A Philippine Legal Article

I. Introduction

A temporary outstation assignment is common in airline operations. Airline employees may be assigned away from their regular base to support flight operations, airport services, ground handling, maintenance, cargo, sales, customer service, station opening, audit, training, irregular operations, aircraft recovery, route launch, or manpower shortage at another airport or station. When this happens, the employee often incurs additional expenses for meals, transportation, lodging, laundry, communication, and incidental costs.

The central legal question is whether the employee is entitled to per diem during the temporary outstation assignment.

In the Philippine context, the answer depends on several factors: the employment contract, company policy, collective bargaining agreement, past company practice, the nature of the assignment, whether the employee remained away from the regular workplace, whether expenses were actually incurred, whether lodging and meals were provided, whether the benefit has ripened into a demandable right, and whether non-payment violates labor standards, contractual obligations, or the rule against diminution of benefits.

Per diem is not always a statutory labor standard like minimum wage or overtime pay. It is usually a contractual, policy-based, CBA-based, or practice-based benefit. However, once promised, regularly granted, or incorporated into employment terms, it may become legally enforceable.

II. Meaning of Per Diem

“Per diem” literally means “per day.” In employment practice, it usually refers to a daily allowance paid to an employee for expenses incurred while performing work away from the regular workplace or official station.

For airline employees, per diem may cover:

meals;
local transportation;
lodging, if not directly provided;
laundry;
communication;
incidental travel expenses;
airport transfers;
foreign exchange differential;
cost-of-living difference at the outstation;
hardship or station allowance;
temporary relocation expenses.

Some companies use related terms, such as:

meal allowance;
station allowance;
subsistence allowance;
travel allowance;
layover allowance;
outstation allowance;
duty travel allowance;
field allowance;
daily living allowance;
temporary assignment allowance;
accommodation allowance;
relocation allowance.

The label is not controlling. The legal treatment depends on the purpose and actual nature of the payment.

III. Airline Context: What Is a Temporary Outstation Assignment?

An airline employee’s “station” or “base” is usually the regular place where the employee reports for work. For flight crew, this may be a home base or crew base. For ground staff, it may be a specific airport, office, terminal, hangar, cargo facility, ticketing office, or operations center.

A temporary outstation assignment occurs when the employee is sent to another location for a limited period while still remaining employed under the same employer.

Examples include:

Manila-based ground staff sent to Cebu for two weeks;
Cebu-based station employee assigned to Clark for route launch;
maintenance personnel sent to Davao to support aircraft recovery;
cargo employee temporarily assigned to Iloilo due to manpower shortage;
customer service agent sent to another airport for peak-season operations;
safety, audit, or quality personnel sent to inspect another station;
commercial employee sent to open a sales office;
flight dispatcher temporarily assigned to another operations control office;
cabin crew or pilots assigned to another base temporarily;
trainer sent to conduct outstation training;
supervisor sent to manage irregular operations after flight disruption.

The temporary nature matters. A temporary outstation assignment is different from a permanent transfer, reassignment, relocation, or change of work base. The distinction affects per diem entitlement.

IV. Is Per Diem Required by Law?

There is no single general rule in Philippine labor law requiring all employers to pay per diem whenever an employee is temporarily assigned elsewhere. Per diem is typically not a universal statutory benefit in the same way as minimum wage, holiday pay, overtime pay, night shift differential, service incentive leave, 13th month pay, SSS, PhilHealth, and Pag-IBIG coverage.

However, per diem may become legally demandable if it is provided by:

employment contract;
company policy or employee handbook;
collective bargaining agreement;
travel policy;
assignment memorandum;
board or management resolution;
established company practice;
industry-specific agreement;
individual undertaking by the employer;
lawful order, settlement, or award.

Thus, the first step is to identify the legal source of the claimed entitlement.

V. Sources of Per Diem Entitlement

A. Employment Contract

If the employment contract states that the employee is entitled to per diem when assigned outside the regular station, the employer must comply. The contract may define:

amount per day;
covered locations;
domestic or international rate;
eligibility;
duration;
required documentation;
deductions if meals or lodging are provided;
approval process;
liquidation rules;
tax treatment.

If the contract is silent, the employee may still rely on policy, CBA, or practice.

B. Company Policy or Employee Handbook

Many airlines have travel or duty assignment policies. These policies may provide per diem rates for domestic and foreign travel.

A policy may classify employees by:

rank;
job level;
union or non-union status;
station;
country or city;
length of assignment;
nature of duty;
whether accommodation is provided;
whether meals are included.

If the company has a written policy granting per diem, employees who fall within the policy should generally receive it.

C. Collective Bargaining Agreement

For unionized airline employees, the CBA is often the most important source. The CBA may contain provisions on:

layover allowance;
meal allowance;
outstation allowance;
travel allowance;
temporary assignment allowance;
lodging;
transportation;
station transfer;
route assignment;
deadhead travel;
rest periods;
hardship allowance;
reimbursement procedure;
grievance mechanism.

If the CBA grants per diem, non-payment may be grievable and may proceed through the CBA’s grievance machinery and voluntary arbitration.

D. Assignment Memorandum or Travel Order

A specific assignment letter or travel order may state the allowances for the assignment. If management issues a travel order promising a daily allowance, that document can become an enforceable basis.

The employee should keep copies of:

travel order;
assignment memo;
email approval;
itinerary;
hotel booking;
duty schedule;
station reporting instructions;
reimbursement instructions.

E. Past Practice

Even if no written contract or policy exists, a regular, consistent, and deliberate company practice of paying per diem may ripen into a demandable benefit.

For example, if an airline has consistently paid Manila-based airport staff a daily allowance whenever assigned to provincial stations for several years, it may be difficult for the company to suddenly withdraw the benefit without legal justification.

Past practice is fact-specific. The employee must show that the grant was not isolated, discretionary, accidental, or temporary.

F. Management Prerogative With Limits

Employers generally have management prerogative to assign employees according to business needs. However, the exercise of management prerogative must be done in good faith, without discrimination, without bad faith, and without violating law, contract, CBA, or established rights.

If the employer sends employees to an outstation and requires them to incur expenses necessary for work, refusing to provide agreed or established allowances may be legally questionable.

VI. Per Diem Versus Reimbursement

Per diem and reimbursement are related but different.

A. Per Diem

A per diem is a fixed daily amount. The employee may not need to submit receipts for every meal or incidental expense, depending on policy. It is paid because the employee is away from base and is presumed to incur additional expenses.

Example:

An airline gives ₱1,500 per day to employees assigned outside their home station.

B. Reimbursement

Reimbursement pays back actual expenses incurred by the employee. It usually requires receipts, approval, and liquidation.

Example:

The employee pays ₱700 for airport transfer and submits the receipt for reimbursement.

C. Hybrid System

Some airlines use both:

hotel paid directly by company;
airfare booked by company;
fixed meal per diem;
reimbursable transportation;
actual laundry reimbursement after a certain number of days;
communication allowance.

A dispute may arise when the employer says per diem is unnecessary because expenses are reimbursable, while the employee claims that the policy grants both.

The written policy or CBA controls.

VII. Per Diem Versus Wage

Per diem may or may not be treated as wage depending on its nature.

A. Expense Allowance

If per diem is intended to cover travel or subsistence expenses incurred because of temporary assignment, it is often considered an allowance or reimbursement-type benefit rather than basic wage.

B. Wage Supplement

If the allowance is regularly given regardless of actual travel expenses, is freely available for the employee’s personal use, and forms part of compensation, it may be argued as a wage supplement or benefit.

C. Importance of Classification

Classification matters for:

overtime computation;
13th month pay;
tax treatment;
retirement pay;
separation pay;
social security contributions;
diminution of benefits;
wage orders;
payroll reporting.

An employer cannot avoid wage obligations by simply labeling compensation as “allowance” if it is actually part of wages. Conversely, a true travel expense allowance does not automatically become basic salary.

VIII. Temporary Assignment Versus Permanent Transfer

Per diem is usually associated with temporary assignments, not permanent transfers. Therefore, classifying the assignment is critical.

A. Temporary Outstation Assignment

Indicators of temporary assignment:

assignment has a definite period;
employee remains based in original station;
travel order states temporary detail;
employee is expected to return;
payroll, supervisor, or HR record remains at original base;
lodging is temporary;
family relocation is not required;
employee continues to hold position in original station;
outstation need is project-based, seasonal, or emergency-related.

In this case, per diem is more likely if company policy grants it.

B. Permanent Transfer

Indicators of permanent transfer:

employee’s official station is changed;
employee is reassigned indefinitely;
employee reports to new station as regular workplace;
employment records are updated;
employee is no longer expected to return to original base;
relocation assistance, not per diem, may apply;
new supervisor and worksite are permanent.

In a permanent transfer, per diem may stop after the effective date of transfer unless the contract, CBA, or relocation policy provides otherwise.

C. Disputed Classification

Employers may label an assignment “temporary” but keep the employee outstation for months or years. Conversely, they may call it “transfer” to avoid per diem even though the assignment is temporary in substance.

The facts matter more than the label.

IX. When Does Per Diem Start?

Per diem may start:

on the day of departure from the home station;
on the day of arrival at the outstation;
on the first day of actual duty at the outstation;
after a minimum number of hours away from base;
only for overnight assignments;
only if the outstation is outside a specified radius;
from the date stated in the travel order.

The governing policy should specify the start date.

If the policy is silent, reasonable interpretation may depend on the purpose of the allowance. If per diem covers meals and incidental expenses while away, it may be arguable that entitlement begins once the employee leaves the regular station for official duty.

X. When Does Per Diem End?

Per diem may end:

on return to home station;
on the last day of duty at the outstation;
on the date of permanent transfer;
when the temporary assignment is cancelled;
when the employee goes on personal leave;
when the employee refuses assignment without valid reason;
when company-provided full board covers the expenses, if policy allows offset;
after the maximum period allowed by policy.

Disputes often arise when the employee is retained beyond the original temporary period. If the assignment is extended, the per diem obligation may also extend unless the policy provides a cap or the employee’s status changes.

XI. Domestic Versus International Per Diem

Airline employees may be assigned within the Philippines or abroad. Per diem rates usually differ.

A. Domestic Outstation

Domestic outstation examples:

Manila to Cebu;
Cebu to Manila;
Clark to Davao;
Iloilo to Caticlan;
Davao to Zamboanga;
Puerto Princesa to Manila.

Domestic per diem may be lower because expenses are in Philippine pesos.

B. International Outstation

International outstation examples:

Manila employee assigned to Singapore station;
Cebu-based employee sent to Hong Kong for station support;
Philippine-based maintenance employee assigned to Japan for aircraft issue;
airline sales employee sent to Dubai or Doha.

International per diem may be higher due to foreign cost of living, currency exchange, meals, transport, and communication.

C. Foreign Exchange Issues

If the allowance is stated in foreign currency, the policy should specify:

applicable exchange rate;
payment currency;
conversion date;
payroll treatment;
cash advance rules;
liquidation rules.

XII. Lodging, Meals, and Per Diem Deductions

Employers sometimes provide hotel accommodation and meals. Does that remove per diem entitlement?

The answer depends on policy.

A. Full Per Diem Despite Hotel

Some policies grant full per diem even if lodging is provided because per diem covers meals and incidentals.

B. Reduced Per Diem

Some policies reduce per diem if:

breakfast is included in hotel;
meals are provided during training;
lodging is company-paid;
station provides staff meals;
airline lounge meals are available;
client or supplier pays meals.

C. No Per Diem if Full Board Provided

Some policies state that no per diem is payable if the company provides lodging and all meals.

D. Employee’s Argument

The employee may argue that even with hotel accommodation, other expenses remain, such as local transport, laundry, personal meals, toiletries, communication, and incidental costs.

E. Employer’s Argument

The employer may argue that per diem is only for actual expenses and that if all necessary expenses are directly paid, no additional allowance is due.

Again, the written policy, CBA, and established practice determine the outcome.

XIII. Per Diem During Rest Days, Holidays, and Days Off at Outstation

A frequent dispute is whether per diem is payable on rest days, holidays, or days off while the employee remains at the outstation.

A. Employee’s Position

If the employee remains away from home because of official assignment, expenses continue even on rest days. Meals, transport, and incidental living costs do not disappear merely because it is a rest day.

B. Employer’s Position

The employer may say per diem is payable only for actual duty days, not rest days, unless policy states otherwise.

C. Practical Rule

If per diem is meant as a subsistence allowance for being away from base, it should logically cover all days the employee is required to remain outstation. If it is meant as a duty-day meal allowance, it may be limited to workdays.

The exact wording matters.

XIV. Per Diem During Leave While Outstation

If the employee takes vacation leave, sick leave, emergency leave, or personal leave while on temporary outstation assignment, entitlement depends on the reason and policy.

Possible treatment:

per diem continues if the employee remains outstation for company-required reasons;
per diem stops during personal leave;
per diem continues during sick leave if illness occurred during assignment and the employee cannot return;
per diem stops if employee voluntarily extends stay for personal reasons;
per diem resumes when official duty resumes.

A fair policy should distinguish between company-required presence and personal travel.

XV. Per Diem During Training

Airline employees may be sent to another station for training. Per diem may apply if the training is outside the regular station.

Examples:

safety training in Manila for provincial employees;
customer service training in Cebu;
aircraft maintenance type training abroad;
recurrent training at a company training center;
system training for a new route.

If the employee is required to attend training away from base, per diem may be due if provided by policy or practice. If the employer provides dormitory and meals, the rate may be reduced if the policy allows.

XVI. Per Diem for Flight Crew

Flight crew per diem may be governed by special arrangements, including crew layover rules, flight duty regulations, company operations manuals, crew contracts, and CBAs.

For pilots and cabin crew, related allowances may include:

layover allowance;
meal allowance;
transport allowance;
international station allowance;
hotel accommodation;
rest period-related benefits;
deadhead travel allowance;
positioning allowance;
standby allowance;
foreign station allowance.

A temporary outstation assignment for crew may mean a change of crew base, temporary basing, extended layover, reserve duty at another station, or route-specific deployment. Entitlement depends heavily on the CBA and crew policies.

XVII. Per Diem for Ground Staff

Ground staff may include:

passenger service agents;
ramp agents;
cargo staff;
load control personnel;
operations personnel;
station supervisors;
duty managers;
customer service representatives;
ticketing agents;
sales staff;
maintenance personnel;
engineering support;
security coordinators;
quality and safety auditors;
administrative staff.

Ground staff per diem is often governed by travel policy, outstation assignment policy, or CBA. Because ground staff may not receive the same layover benefits as flight crew, a specific outstation allowance policy becomes important.

XVIII. Per Diem for Maintenance and Engineering Employees

Aircraft maintenance and engineering employees may be temporarily deployed for:

aircraft-on-ground recovery;
line maintenance support;
scheduled checks;
technical rescue;
audit;
tooling support;
engine change;
aircraft delivery or ferry;
station setup.

These assignments may involve irregular hours, remote airport work, overnight stays, and urgent travel. Per diem may be accompanied by:

overtime;
night shift differential;
hazard or hardship allowance;
tool allowance;
transportation;
hotel;
meal reimbursement.

The employer cannot use per diem to avoid statutory overtime, rest day, holiday, or night shift obligations unless legally allowed and clearly structured.

XIX. Per Diem and Overtime Pay

Per diem is not a substitute for overtime pay.

If an airline employee works beyond normal hours during an outstation assignment, overtime rules may apply, subject to the employee’s classification and applicable exemptions.

For rank-and-file employees, statutory overtime may be due for work beyond eight hours a day. Rest day and holiday work may also create premium pay obligations. Night shift differential may apply for covered employees working during the statutory night period.

An employer cannot say: “You received per diem, so you are no longer entitled to overtime,” unless the employee is exempt or there is a lawful arrangement. Per diem covers expenses or outstation allowance; overtime compensates additional work.

XX. Per Diem and Night Shift Differential

Airline operations often run at night. If a covered employee works during the statutory night shift period, night shift differential may be due. Per diem does not automatically replace night shift differential.

For example, a passenger service agent temporarily assigned to another airport and working a midnight shift may be entitled to both:

per diem under policy; and
night shift differential under law, if covered.

XXI. Per Diem and Rest Day or Holiday Pay

If the employee works on a rest day, special day, or regular holiday while at the outstation, the applicable premium pay rules may apply. Per diem does not automatically erase these statutory benefits.

The employer should distinguish:

per diem for being away;
regular wages for work;
overtime pay for excess hours;
rest day premium;
holiday pay;
night shift differential.

Failure to distinguish these can lead to underpayment claims.

XXII. Per Diem and Minimum Wage

If per diem is a true expense allowance, it should not be used to satisfy minimum wage obligations. The employee must still receive at least the applicable wage required by law.

However, if an allowance is actually part of wage, its treatment may differ. The nature of the payment must be examined.

XXIII. Per Diem and 13th Month Pay

A true per diem or travel expense allowance is generally not part of basic salary for 13th month pay computation. However, if the so-called per diem is actually a regular wage supplement not tied to outstation expenses, employees may argue that it should be included.

The key question is whether the allowance is part of basic compensation or a reimbursement/subsistence allowance for official travel.

XXIV. Per Diem and Taxation

Per diem may have tax implications. The tax treatment depends on whether it is:

a reimbursement of ordinary and necessary business expenses;
a substantiated travel expense;
an accountable plan-type payment;
a fixed allowance without liquidation;
compensation income;
fringe benefit for managerial or supervisory employees;
taxable benefit.

Employers should structure per diem policies carefully and consult tax rules. Employees should understand that some allowances may be taxable depending on treatment.

A common dispute arises when employees expect a fixed net amount but payroll deducts withholding tax. Whether this is proper depends on the nature of the allowance, company policy, and tax classification.

XXV. Per Diem and Liquidation

Some companies require liquidation of cash advances. Others pay per diem without receipts.

A. Liquidated Per Diem

If the amount is an advance subject to liquidation, the employee may need to submit receipts and return excess funds.

B. Non-Liquidated Per Diem

If it is a fixed allowance, the employee may not need to submit receipts. However, the employer may still require proof of travel or duty.

C. Consequences of Non-Liquidation

Failure to liquidate may lead to:

payroll deduction, if legally allowed and authorized;
denial of future advances;
disciplinary action;
accounting charge;
dispute over whether the amount was a benefit or cash advance.

The policy should clearly state whether per diem is a cash advance or an allowance.

XXVI. Can the Employer Require Receipts for Per Diem?

Yes, if the governing policy provides that the per diem is liquidable or reimbursable. But if the policy grants a fixed per diem without receipt requirement, the employer should not impose a new receipt requirement arbitrarily if it effectively reduces an established benefit.

A change in procedure may be valid if reasonable, prospective, and not a disguised withdrawal of a vested benefit.

XXVII. Can Per Diem Be Reduced?

Per diem may be reduced if:

policy allows reduction when meals or lodging are provided;
assignment changes;
employee becomes permanently transferred;
the benefit is discretionary and not vested;
the CBA is renegotiated lawfully;
business policy is changed prospectively without violating vested rights;
tax rules require different treatment;
employee is no longer eligible.

However, reduction may be unlawful if it violates:

employment contract;
CBA;
established company practice;
non-diminution of benefits;
equal protection or anti-discrimination principles;
wage laws;
good faith and fair dealing.

XXVIII. Non-Diminution of Benefits

The principle of non-diminution of benefits may apply when a benefit has been given regularly, deliberately, and consistently over time, and employees have come to rely on it as part of employment terms.

For airline employees, non-diminution may be argued if the company has long paid per diem for temporary outstation assignments and then suddenly stops paying without valid basis.

To prove non-diminution, employees may show:

payroll records;
prior per diem claims;
previous travel orders;
emails approving allowances;
testimony of employees;
company memos;
audit records;
CBA provisions;
handbook provisions;
long-standing practice across similar assignments.

The employer may respond that the benefit was conditional, temporary, discretionary, given by mistake, or tied to circumstances that no longer exist.

XXIX. Equal Treatment and Discrimination Issues

If some employees receive per diem while others similarly situated do not, legal issues may arise.

Possible discriminatory or unfair situations:

employees from one station receive per diem but employees from another do not without valid reason;
union members receive less than non-union employees contrary to CBA;
contractual employees are denied allowances despite performing the same outstation work under the same policy;
women or older employees are treated differently;
employees who complained are denied per diem in retaliation;
favored employees receive allowances without criteria.

Differences may be lawful if based on valid distinctions, such as rank, destination cost, CBA coverage, assignment type, or expense coverage. But arbitrary denial may support a grievance or labor complaint.

XXX. Probationary, Regular, Project, Seasonal, and Contractual Employees

Per diem entitlement may depend on employment status only if the policy makes such distinction.

A. Probationary Employees

A probationary employee assigned outstation may be entitled if the policy applies to employees generally or to the position.

B. Regular Employees

Regular employees commonly enjoy full policy or CBA benefits.

C. Project or Seasonal Employees

If project or seasonal employees are required to travel, they may be entitled to per diem if provided by contract, policy, or practice.

D. Agency-Deployed Workers

If workers are deployed by a manpower agency to an airline, the service agreement and employment contract should specify who pays travel allowances. If the principal airline directs outstation work, disputes may arise over responsibility.

E. Independent Contractors

True independent contractors are governed by contract, not labor standards. But if the worker is actually an employee misclassified as a contractor, labor rights may apply.

XXXI. Unionized Employees and Grievance Procedure

If the airline employees are covered by a CBA, the dispute may first go through the grievance machinery. The CBA may require:

discussion with immediate supervisor;
written grievance;
HR or labor relations conference;
union-management meeting;
voluntary arbitration.

A per diem dispute based on CBA interpretation is usually not simply an ordinary money claim. It may be a grievance or CBA interpretation issue.

Employees should follow the CBA procedure to avoid dismissal for prematurity or wrong forum.

XXXII. Non-Union Employees and Money Claims

Non-union employees may raise per diem claims internally through HR, payroll, or management. If unresolved, the proper legal forum depends on the nature and amount of the claim, employment status, and whether termination is involved.

A claim for unpaid allowances may be treated as a money claim. If accompanied by illegal dismissal, constructive dismissal, retaliation, or unfair labor practice allegations, jurisdictional analysis may change.

XXXIII. Can an Employee Refuse Outstation Assignment Without Per Diem?

An employee should be cautious before refusing a lawful work assignment. Employers have management prerogative to assign employees for business needs. Refusal may lead to disciplinary action if the assignment is lawful, reasonable, and within the employee’s duties.

However, if the assignment requires the employee to shoulder unreasonable expenses without reimbursement or promised allowance, the employee may raise a legitimate objection.

The safer approach is to:

ask for written clarification;
request travel order and allowance details;
document expected expenses;
avoid outright insubordination;
comply under protest if safe and feasible;
file grievance or claim afterward;
seek union assistance if covered.

If the assignment is unsafe, discriminatory, retaliatory, or impossible without personal financial burden, the employee should document the reasons carefully.

XXXIV. Employer’s Duty to Reimburse Necessary Work Expenses

Philippine labor law does not have a broad, simple rule that every work expense must always be reimbursed in all circumstances. However, as a matter of contract, equity, labor protection, and fair employment practice, employees should not be forced to personally subsidize necessary business expenses incurred for the employer’s benefit, especially where policy or practice provides reimbursement or allowance.

For airline outstation assignments, necessary expenses may include:

official transportation;
required lodging;
meals while away;
communication for operations;
baggage for tools or uniforms;
local transfers;
emergency expenses caused by the assignment.

If the employer required the travel, the business should generally bear the legitimate business expenses according to policy.

XXXV. Per Diem and Constructive Dismissal

Non-payment of per diem alone does not automatically constitute constructive dismissal. However, an outstation assignment may become problematic if it is used to make employment unbearable.

Possible constructive dismissal indicators:

assignment to remote station without allowance or support;
assignment far from home as punishment;
unreasonable duration without relocation assistance;
denial of lodging or meals despite known inability to pay;
discriminatory selection;
demotion disguised as assignment;
salary reduction;
isolation from regular duties;
retaliatory transfer after complaint;
forcing resignation by making conditions impossible.

The issue is whether the employer’s acts are unreasonable, hostile, or designed to force the employee to quit.

XXXVI. Per Diem and Floating Status

Airline industry disruptions sometimes lead to temporary assignments, standby arrangements, or lack of regular station work. If an employee is sent to an outstation instead of being placed on floating status or reduced work, per diem entitlement still depends on policy.

A temporary assignment should not be used to evade wage obligations or impose hidden costs on employees.

XXXVII. Temporary Outstation During Route Launch or Station Opening

When an airline opens a new route or station, it may send experienced employees from existing stations. Common issues include:

length of temporary assignment;
hotel accommodations;
meal allowance;
overtime;
rest days;
local transportation;
training of local hires;
return ticket;
extension of assignment;
conversion to permanent station;
family relocation.

The assignment memo should clearly state whether the employee is temporarily detailed or permanently transferred. If temporary, per diem should follow the travel or outstation policy.

XXXVIII. Temporary Outstation Due to Manpower Shortage

If an employee is sent to another station because of manpower shortage, the employer may argue that this is operational necessity. That may justify the assignment, but it does not automatically remove allowance obligations.

If the company has a policy granting per diem for temporary duty outside base, manpower shortage assignments should ordinarily be covered unless expressly excluded.

XXXIX. Temporary Outstation During Irregular Operations

Irregular operations include cancellations, diversions, aircraft-on-ground situations, weather disruptions, airport closures, strikes, and emergency recovery operations.

Employees may be sent to support affected stations. Because such assignments can be urgent, written approvals may be incomplete. Employees should later request documentation and keep records of:

travel dates;
duty schedules;
hotel stay;
meals;
actual expenses;
supervisor instructions;
emergency approvals.

An employer should not deny per diem merely because the assignment was urgent if the employee was clearly sent on official duty.

XL. Per Diem for Same-Day Outstation Travel

If an employee travels to another station and returns the same day, entitlement depends on policy.

Some policies grant:

full per diem for travel exceeding a certain number of hours;
half-day per diem;
meal allowance only;
actual reimbursement only;
no per diem unless overnight stay is required.

For example, a Manila employee sent to Cebu in the morning and back at night may incur meals and transport but no lodging. A half-day or meal allowance may apply if provided by policy.

XLI. Per Diem for Remote Work From Another Station

If the employee voluntarily works remotely from another location, per diem may not be due. Per diem usually applies when the employer requires the employee to work away from the regular station.

If the company directs the employee to report physically to another station while performing similar work, per diem may apply.

The distinction is between:

employee-requested work-from-elsewhere; and
employer-directed temporary outstation assignment.

XLII. Required Documentation for Claiming Per Diem

Employees should prepare:

travel order;
assignment memo;
email or message from supervisor;
boarding passes;
tickets;
hotel folio;
duty roster;
attendance records;
station log;
reimbursement forms;
receipts for reimbursable items;
payroll records;
prior per diem payments;
company policy;
CBA provisions;
employee handbook;
communications with HR;
bank statements showing payments or non-payment;
written demand.

The absence of documents does not always defeat the claim, but documentation greatly strengthens it.

XLIII. Employer Documentation and Controls

Employers should maintain clear policies to avoid disputes.

A good policy should specify:

eligibility;
covered assignments;
approval authority;
domestic and international rates;
full-day and half-day rules;
treatment of rest days;
treatment of leave days;
deductions for provided meals or lodging;
maximum duration;
extension process;
liquidation rules;
tax treatment;
payment schedule;
documentation requirements;
emergency assignment procedure;
relationship with overtime and other benefits;
grievance or appeal process.

Ambiguous policies are often interpreted against the drafter, especially where labor protection principles apply.

XLIV. Written Demand for Unpaid Per Diem

Before filing a case, an employee may send a written request or demand.

It should include:

assignment dates;
outstation location;
basis of entitlement;
applicable policy or CBA provision;
amount claimed;
previous payments made, if any;
unpaid balance;
attached documents;
request for payment by a reasonable date.

The tone should be professional. Employees should avoid accusations unless necessary.

XLV. Sample Demand Structure

A demand may be structured as follows:

Identify the employee and position.
State regular station.
State temporary outstation assignment.
State travel dates and duty dates.
Cite policy, contract, CBA, or practice.
State per diem rate.
Compute total amount.
Deduct amounts already paid.
Request payment.
Reserve rights.

For unionized employees, the demand should usually be coordinated with the union or filed as a grievance if required.

XLVI. Computation of Per Diem

A basic computation is:

Daily rate × number of covered days = gross per diem

Then adjust for:

half-day rates;
meals provided;
lodging provided;
leave days;
rest days;
prior advances;
taxes, if applicable;
foreign exchange;
reimbursed expenses;
policy caps.

Example:

Employee assigned to Cebu for 15 days. Policy grants ₱1,200 per day for temporary domestic outstation assignment. Hotel is provided but meals are not. Policy does not deduct for hotel.

₱1,200 × 15 days = ₱18,000 per diem.

If the employer paid only ₱10,000, unpaid balance is ₱8,000, subject to any lawful deductions.

XLVII. Disputes Over Counting Days

Common counting issues include:

whether travel day counts;
whether return day counts;
whether rest days count;
whether holidays count;
whether day of arrival without duty counts;
whether delayed flights count;
whether personal extension counts;
whether quarantine or medical isolation counts;
whether assignment extension was official.

The policy should answer these questions. If not, the purpose of the allowance should guide interpretation.

XLVIII. Prescription of Claims

Money claims under labor law are subject to prescriptive periods. Employees should not delay. Claims for unpaid allowances, wages, or benefits may prescribe if not filed within the applicable period.

Even before prescription, delay can weaken evidence and make records harder to obtain.

XLIX. Burden of Proof

In a per diem claim, the employee generally needs to prove:

employment relationship;
temporary outstation assignment;
entitlement source;
period covered;
amount due;
non-payment or underpayment.

The employer may need to prove payment, policy exclusions, liquidation issues, or lawful basis for denial.

Payroll records, travel orders, and company policies are often in the employer’s possession. Employees should keep personal copies.

L. Common Employer Defenses

Employers may argue:

no policy grants per diem;
assignment was permanent, not temporary;
per diem was discretionary;
employee was provided lodging and meals;
employee failed to liquidate cash advances;
employee was on personal leave;
amount was already paid;
claim is prescribed;
CBA excludes the employee;
employee was not similarly situated with those who received per diem;
benefit was given by mistake;
emergency assignment was subject to actual reimbursement only;
employee voluntarily requested the outstation work;
rate claimed is incorrect;
employee is managerial and governed by separate policy.

These defenses must be supported by evidence.

LI. Common Employee Arguments

Employees may argue:

policy expressly grants per diem;
CBA covers temporary outstation assignments;
company has long paid the benefit;
assignment remained temporary;
lodging alone does not cover meals and incidentals;
rest days should count because employee remained outstation for company reasons;
per diem is separate from overtime and statutory benefits;
similarly situated employees were paid;
denial is discriminatory or retaliatory;
the company cannot diminish established benefits;
the employee incurred necessary expenses for company business;
non-payment caused financial burden;
the employer benefited from the outstation assignment.

LII. Proper Forum for Dispute

The proper forum depends on the facts.

A. Internal HR or Payroll

Initial correction may be possible through HR, finance, payroll, or station management.

B. Grievance Machinery

If covered by a CBA, the grievance process may be mandatory.

C. Voluntary Arbitration

CBA interpretation disputes often proceed to voluntary arbitration.

D. Labor Arbiter

Money claims, illegal dismissal with money claims, or employment disputes may fall under labor arbiter jurisdiction depending on the nature of the claim.

E. DOLE Mechanisms

Certain labor standards issues may be raised through Department of Labor and Employment mechanisms, depending on the claim and circumstances.

F. Civil Court

If the person is not an employee but an independent contractor, civil court or contract remedies may apply.

Choosing the wrong forum may delay the case.

LIII. Per Diem and Management Prerogative

Airlines operate in a highly dynamic environment. Management must move employees to maintain flights, safety, station operations, and customer service. This operational reality supports the employer’s right to temporarily assign employees.

However, management prerogative does not authorize the employer to ignore agreed benefits. If the employer requires outstation duty, it must comply with contractual, CBA, policy, and legal obligations attached to that assignment.

The proper balance is:

employer may assign employees for legitimate business reasons;
employee must comply with lawful assignments;
employer must pay legally or contractually required wages, allowances, and benefits;
assignment must not be discriminatory, retaliatory, oppressive, or in bad faith.

LIV. Per Diem and Business Necessity

Business necessity may justify temporary assignment, but it does not automatically justify non-payment.

For example:

An airline urgently sends staff from Manila to Cebu after mass absences at the Cebu station. Business necessity supports the deployment. But if the travel policy grants domestic outstation per diem, the employee should still be paid according to policy.

Business necessity explains why the employee was sent. It does not by itself answer what the employee is owed.

LV. Per Diem During Probationary Station Evaluation

Some airlines assign employees to different stations for evaluation or training. If the employee’s regular station is not yet fixed, the employer may argue that there is no outstation because assignment to different locations is part of training.

The employee may argue that once a reporting base is designated, assignment elsewhere triggers per diem.

The offer letter, training contract, and onboarding documents matter.

LVI. Per Diem for Employees Assigned From Province to Manila

Some employers assume allowances apply only when Manila-based employees go to provinces, not when provincial employees go to Manila. That is not necessarily correct.

If the policy says employees are entitled when assigned outside their regular station, a Cebu-based employee temporarily assigned to Manila should be covered in the same way unless the policy validly provides different rates.

Different rates may be lawful because cost of living differs, but total denial without basis may be questionable.

LVII. Per Diem and Accommodation in Company Dormitory

If the airline provides a dormitory or staff house at the outstation, per diem may still be due if it covers meals and incidentals. If the policy states that dormitory plus meals replaces per diem, then the allowance may be reduced or unavailable.

The quality and adequacy of accommodation may also matter. If the dormitory is unsafe, overcrowded, or far from the workplace, employees may raise occupational safety, health, or reasonableness concerns.

LVIII. Per Diem and Uniform, Laundry, and Grooming Costs

Airline employees often have grooming and uniform requirements. Temporary outstation assignments may create additional laundry and maintenance costs.

If the per diem is intended to cover incidentals, laundry may be included. If the assignment is long, a separate laundry allowance may be reasonable or provided by policy.

The employee should check whether uniform maintenance is separately reimbursable.

LIX. Per Diem and Communication Expenses

Outstation employees may need mobile data, calls, roaming, or messaging for operations. If these are required for work, the company should clarify whether they are covered by per diem, reimbursable, or provided through company devices.

If employees are required to use personal phones for outstation operations, disputes may arise over reimbursement.

LX. Per Diem and Transportation

Transportation may include:

flight to outstation;
land transfer to hotel;
daily hotel-airport transfer;
airport terminal transfer;
transport to training site;
emergency transport;
return travel.

Some policies include local transport in per diem. Others reimburse it separately. The employer should not require employees to pay unavoidable official transport costs without reimbursement where policy provides coverage.

LXI. Per Diem and Safety

Outstation assignments can involve safety issues, including late-night transport, unfamiliar locations, natural disasters, civil disturbances, health risks, or unsafe accommodation.

The employer has a duty to provide a safe work environment. Per diem is not a substitute for safety measures. The employer should ensure:

safe lodging;
safe transport;
emergency contacts;
medical support;
reasonable schedules;
compliance with rest rules;
security guidance;
incident reporting.

If an employee refuses an assignment due to genuine safety concerns, the facts should be documented.

LXII. Special Considerations for Female Employees

Female airline employees assigned outstation may face added safety and accommodation concerns. Employers should avoid discriminatory assumptions but must provide safe, secure, and dignified accommodations.

Issues may include:

shared rooms;
late-night transport;
harassment risks;
security of lodging;
pregnancy;
lactation needs;
safe spaces obligations;
gender-based harassment.

If per diem or accommodation policies are applied in a way that exposes employees to unsafe conditions, the matter may go beyond allowance disputes.

LXIII. Per Diem and Pregnant Employees or Employees With Medical Conditions

If an employee has a medical condition, pregnancy, disability, or other health concern, temporary outstation assignment may require reasonable accommodation or medical clearance.

Per diem entitlement remains a separate issue. The employer should not deny per diem because the employee requires medical accommodation.

LXIV. Per Diem and Disciplinary Assignments

If an employee is sent to an outstation as punishment, the assignment may be challenged if it is punitive, unreasonable, humiliating, or not supported by business necessity.

Even if the assignment is lawful, per diem may still be due if the policy covers outstation duty. Disciplinary motive does not remove financial obligations.

LXV. Per Diem and Retaliation

An employer should not deny per diem because the employee:

joined a union;
filed a grievance;
complained about labor standards;
reported safety issues;
refused illegal orders;
reported harassment;
questioned payroll.

Retaliatory denial may support additional legal claims.

LXVI. Per Diem and Documentation by Email or Messaging Apps

Airline operations often use email, Viber, WhatsApp, Teams, Workplace, or other messaging platforms for urgent assignments. These communications may be evidence.

Employees should preserve:

supervisor instructions;
assignment details;
travel schedule;
station duty roster;
allowance promises;
HR approvals;
payroll responses;
screenshots with dates;
group chat announcements.

For formal claims, screenshots should be organized and authenticated through affidavit if needed.

LXVII. Practical Checklist for Airline Employees

An employee assigned temporarily to an outstation should:

Ask for written travel order or assignment memo.
Confirm whether the assignment is temporary or permanent.
Request the applicable per diem rate.
Ask whether lodging, meals, and transport are provided.
Clarify whether rest days are covered.
Keep boarding passes and itineraries.
Keep receipts for reimbursable expenses.
Record duty days and rest days.
Save communications from supervisors.
Check the CBA or company travel policy.
Submit claims promptly.
Follow liquidation procedure.
Escalate non-payment in writing.
Coordinate with the union if covered.
File claim before prescription.

LXVIII. Practical Checklist for Airline Employers

An airline employer should:

Maintain a written outstation assignment policy.
Define temporary assignment clearly.
State per diem eligibility and rates.
Clarify treatment of lodging and meals.
Clarify duty days, rest days, travel days, and leave days.
Ensure compliance with CBA.
Avoid discriminatory application.
Document all travel orders.
Pay allowances promptly.
Separate per diem from wages and statutory benefits.
Maintain payroll and liquidation records.
Train station managers on policy.
Avoid informal promises inconsistent with policy.
Provide safe accommodation and transport.
Respect grievance procedures.
Avoid unilateral withdrawal of vested benefits.

LXIX. Sample Policy Clauses

A clear policy may state:

A. Eligibility

“Employees temporarily assigned outside their official station for company business shall be entitled to per diem in accordance with this policy.”

B. Temporary Assignment

“Temporary assignment means official duty outside the employee’s regular station for a period not exceeding ___ days, unless extended in writing.”

C. Covered Days

“Per diem shall be payable for each calendar day the employee is required to remain at the outstation, including travel days and rest days, but excluding personal leave days and personal extensions.”

D. Provided Meals

“Where the company provides all meals, the meal component of the per diem shall be deducted according to the schedule below.”

E. Lodging

“Company-provided lodging shall not affect the incidental allowance unless otherwise stated.”

F. Liquidation

“Per diem is a fixed allowance and does not require meal receipts. Transportation and other reimbursable expenses require receipts.”

G. Extension

“Any extension of temporary assignment must be approved in writing and shall carry the corresponding per diem unless the assignment is converted into permanent transfer.”

These clauses reduce disputes.

LXX. Common Mistakes by Employees

Employees often weaken their claims by:

not securing written assignment proof;
failing to keep travel documents;
delaying claims;
assuming all expenses are covered without reading policy;
failing to liquidate cash advances;
refusing assignment without documenting reasons;
relying only on verbal promises;
not coordinating with the union;
mixing personal expenses with official expenses;
posting complaints online before using formal channels;
losing receipts;
waiting too long to file.

LXXI. Common Mistakes by Employers

Employers often create liability by:

issuing vague travel orders;
failing to distinguish temporary assignment from transfer;
paying some employees but not others without criteria;
relying on verbal rules;
changing per diem policy retroactively;
ignoring CBA provisions;
treating per diem as substitute for overtime;
delaying reimbursement;
requiring employees to advance large amounts;
denying per diem despite long practice;
failing to provide safe lodging;
making station managers promise allowances informally;
failing to keep payroll records.

LXXII. Illustrative Scenarios

Scenario 1: Policy Expressly Grants Per Diem

A Manila-based ground staff is sent to Davao for ten days. The company travel policy grants ₱1,500 per day for domestic temporary assignments. The employee is entitled to ₱15,000, subject to valid policy deductions.

Scenario 2: Hotel Provided, Meals Not Provided

The company pays for hotel but not meals. If policy says per diem covers meals and incidentals, employee remains entitled. If policy says lodging and meals fully replace per diem, only remaining allowance may be due.

Scenario 3: Assignment Becomes Permanent

Employee is sent to Cebu “temporarily” for one month but later receives a formal permanent transfer. Per diem may be due for the temporary period before transfer, while relocation benefits may apply afterward depending on policy.

Scenario 4: Long-Standing Practice

The airline has paid per diem for all temporary outstation assignments for ten years. It stops paying without notice. Employees may argue non-diminution of benefits.

Scenario 5: CBA Coverage

Unionized station staff have a CBA provision granting outstation allowance. The dispute should generally follow the grievance procedure.

Scenario 6: Same-Day Travel

Employee flies to Iloilo for a station audit and returns the same day. If policy grants half-day allowance for travel exceeding eight hours, employee may claim it. If policy requires overnight stay, claim may fail unless actual reimbursement applies.

Scenario 7: Per Diem Used to Avoid Overtime

Employee works 14-hour shifts at the outstation. Employer says per diem covers extra work. This is legally questionable because per diem does not replace statutory overtime for covered employees.

LXXIII. Conclusion

Airline employees on temporary outstation assignment in the Philippines may be entitled to per diem if the benefit is granted by contract, company policy, collective bargaining agreement, travel order, established practice, or other binding undertaking. Per diem is usually not a universal statutory benefit automatically owed in every case, but once it is promised, regularly granted, or incorporated into employment terms, it can become legally enforceable.

The most important questions are: Was the employee temporarily assigned outside the regular station? What policy, CBA, or practice applies? What expenses were covered by the company? Were meals, lodging, and transportation provided? Did the assignment remain temporary or become permanent? Was the benefit consistently granted before? Was the employee also owed overtime, night shift differential, rest day pay, or holiday pay?

Per diem should not be confused with wages, overtime, or statutory benefits. It usually addresses the additional burden of official duty away from base. An employer may validly manage airline operations and deploy employees where needed, but it must honor applicable allowances and avoid arbitrary, discriminatory, retaliatory, or retroactive denial of benefits.

For employees, the best protection is documentation: travel orders, duty rosters, receipts, policies, CBA provisions, payroll records, and written demands. For employers, the best protection is a clear written policy, consistent application, proper payroll records, safe accommodation, and compliance with CBAs and labor standards.

In short, a temporary outstation assignment may lawfully be required by airline operations, but the financial consequences of that assignment must be handled according to Philippine labor law, employment agreements, company policy, collective bargaining commitments, and the principle that employees should not be made to personally shoulder the necessary costs of the employer’s business.