Quick answer

Usually, an employer cannot unilaterally reduce an employee’s commission rate if the existing rate is part of the employment contract, a collective bargaining agreement (CBA), an express company policy, or a consistent and deliberate company practice that has become part of the employee’s compensation.

A prospective change may be lawful when the commission plan validly allows revisions, the employee genuinely agrees, or the commission is a discretionary incentive that has not yet vested. Even then, the employer cannot retroactively reduce commissions already earned, violate a CBA or minimum-wage requirement, disguise an unlawful wage deduction, discriminate or retaliate against workers, or impose a severe pay cut that amounts to constructive dismissal.

The result depends heavily on the exact wording of the commission plan and on when the commission becomes “earned.”

Why commissions receive legal protection

The Labor Code defines “wage” broadly as remuneration payable for work or services, whether calculated by time, task, piece, commission, or another method. In Songco v. NLRC, the Supreme Court recognized that earned sales commissions attributable to an employee’s transactions are part of wage or salary.

This does not mean every bonus, incentive, or proposed commission is automatically fixed and permanent. The legal character of the payment matters:

A commission earned as direct compensation for completed sales or services is generally treated as wage.
A guaranteed rate stated in an employment contract, CBA, signed compensation plan, or binding policy is generally enforceable according to its terms.
A benefit consistently and deliberately granted over a substantial period may become an enforceable company practice.
A genuinely discretionary bonus that depends on conditions such as profits, management approval, or unachieved targets may not become payable until those conditions are satisfied.

Courts examine the arrangement’s substance, not merely the labels “commission,” “bonus,” “incentive,” or “allowance.”

When a reduction is likely unlawful

The existing rate is contractually guaranteed

An employer generally cannot change a binding compensation term by itself. Under Article 1308 of the Civil Code, a contract must bind both parties; its validity or performance cannot be left solely to one party’s will.

The Supreme Court has explained that employment terms may be express or implied and ordinarily cannot be withdrawn without mutual consent. The non-diminution rule applies when a benefit rests on an express policy, written contract, or established practice. See Home Credit Mutual Building and Loan Association v. Prudente.

A signed acknowledgment of a new rate is relevant, but it is not always conclusive. The surrounding circumstances may matter, including whether the employee understood the change, received consideration, objected promptly, or signed under pressure.

The employer applies the lower rate to commissions already earned

A company should not change the rules after an employee has completed the work that, under the existing plan, earned the commission. The critical issue is the plan’s accrual event—for example:

execution of the sale;
customer payment;
delivery or completion of service;
expiration of a cancellation period;
collection of the account; or
satisfaction of another written condition.

A later payroll date does not necessarily mean the employer may use a newly announced rate. If the commission vested before the change took effect, applying the lower rate may constitute underpayment or unlawful withholding of wages.

The rate has become an established company practice

Even without a written promise, a commission arrangement may become enforceable if it was voluntarily, consistently, and deliberately applied for a considerable period.

In Netlink Computer Inc. v. Delmo, the Supreme Court held that a long-standing method of paying commissions had ripened into company practice and could not be unilaterally diminished. The Court also emphasized that no fixed minimum number of years determines whether a practice has become binding.

The employee bears the burden of establishing the claimed practice. Repeated payslips, commission statements, policies, emails, and records concerning similarly situated employees can be important.

The change violates a CBA

A CBA is binding on the employer, union, and covered employees. If it fixes commission rates or formulas, the employer ordinarily must follow its grievance machinery and bargaining obligations rather than impose a unilateral change.

A dispute involving interpretation or implementation of a CBA normally proceeds through the CBA’s grievance procedure and, if unresolved, voluntary arbitration. Workers should immediately notify their union because the CBA may contain short internal grievance deadlines.

The employee’s total pay falls below the applicable minimum

Commission-based compensation does not give an employer permission to pay below the legally applicable minimum wage. Article 101 of the Labor Code authorizes regulation of wages paid by results to ensure fair and reasonable rates. The applicable wage floor depends on the worker’s region, industry, employer classification, and any lawful exemption.

Current regional wage orders are available from the National Wages and Productivity Commission. A worker should compare the correct regional rate with actual compensation for the relevant pay period, not rely on an outdated nationwide figure.

The reduction is retaliatory or discriminatory

Article 118 of the Labor Code prohibits an employer from reducing wages or benefits, dismissing, or discriminating against an employee because the employee filed a wage complaint, began a proceeding, testified, or was about to testify.

A commission cut directed only at employees who complained, organized, joined a union, took protected leave, or belong to a protected group may raise additional legal issues. Preserve evidence showing the timing of the cut and how other comparable employees were treated.

When an employer may be able to revise the plan

A commission change is more defensible when it operates only prospectively and:

the original agreement clearly reserves a reasonable power to revise the rate or structure;
the employee validly agrees to an amended plan;
the payment is a conditional or discretionary incentive rather than compensation already earned;
the old rate arose from a genuine legal or computational error that the employer corrected promptly after discovery; or
the change is authorized through collective bargaining.

A reservation clause is important but not an unlimited license. Its wording, the parties’ conduct, good faith, notice, and other contractual provisions must still be considered. A clause allowing future changes generally does not authorize confiscation of commissions that already vested.

The Supreme Court has also recognized that the non-diminution rule does not protect every alleged practice. The grant must be supported by an agreement, express policy, or sufficiently consistent and deliberate conduct. An erroneous payment may sometimes be corrected, especially when the mistake involved a doubtful legal question and was addressed promptly. See Limcoma Multi-Purpose Cooperative v. Rodriguez.

A lower commission is not automatically constructive dismissal

Constructive dismissal may exist when an employer makes continued employment impossible, unreasonable, or unlikely, including through a demotion or substantial diminution of pay, or when discriminatory or contemptuous treatment leaves an employee with no realistic choice but to leave.

Not every adjustment qualifies. The amount of the reduction, its contractual basis, business explanation, duration, effect on overall compensation, and the employer’s conduct all matter.

Do not resign impulsively on the assumption that any commission change is constructive dismissal. A voluntary resignation can complicate the case. Before leaving, consider obtaining advice and documenting:

the old and new rates;
the expected monetary effect;
written objections and the employer’s response;
any threats or pressure to accept;
treatment of comparable employees; and
whether work remains available on materially reasonable terms.

Seek urgent legal help if the employer demands an immediate resignation, threatens dismissal for objecting, withholds all pay, or requires a quitclaim as a condition for releasing undisputed wages.

What an employee should do

1. Identify the governing documents

Collect and review:

the employment contract and job offer;
every commission plan or amendment;
the employee handbook and compensation policies;
the CBA, if applicable;
sales targets, territory assignments, and account-ownership rules;
memoranda announcing the change; and
emails, messages, or presentations explaining how commissions are earned.

Look for provisions on amendment, notice, effective date, customer cancellations, collections, chargebacks, returns, split commissions, reassigned accounts, and post-employment payment.

2. Build a transaction-by-transaction computation

For each affected sale or service, record:

Item	Information to record
Transaction	Customer, invoice, project, or account
Work date	When the sale or service was performed
Accrual event	What made the commission payable
Old rate	Rate in force when the commission was earned
New rate	Rate the employer applied
Commission base	Gross sale, net sale, collection, or another amount
Amount paid	Actual payroll or remittance
Difference	Amount allegedly unpaid
Supporting proof	Contract, invoice, CRM record, payslip, or statement

Keep the calculation factual. Do not count uncompleted or cancelled transactions unless the plan expressly treats them as commissionable.

3. Object promptly and in writing

Ask Human Resources or payroll to identify:

the contractual or policy basis for the change;
its effective date;
whether it affects pending transactions;
the definition of an earned commission;
the computation for each disputed account; and
whether employees are expected to sign an amendment.

State clearly that receiving partial payment or continuing to work does not mean you waive the disputed balance. Remain professional and keep proof that the objection was delivered.

4. Preserve evidence lawfully

Save copies of documents to which you are legitimately entitled, including:

payslips and payroll summaries;
bank records showing deposits;
commission statements;
official sales and collection reports;
performance records;
written instructions and change notices;
prior computations showing the established formula; and
messages concerning objections, threats, or retaliation.

Do not remove customer databases, trade secrets, privileged material, or confidential files unrelated to your claim. Where possible, request personal payroll and commission records through proper company channels.

5. Use the appropriate dispute process

Most labor issues must first undergo mandatory conciliation-mediation through the Single Entry Approach or SEnA. A Request for Assistance may be filed online through the official DOLE Assistance for Request Management System or onsite at participating DOLE, National Conciliation and Mediation Board, or NLRC offices.

If no settlement is reached, an individual money claim may proceed to the proper Labor Arbiter, subject to jurisdictional rules. A unionized employee whose dispute requires interpretation or implementation of a CBA should normally use the CBA grievance machinery and voluntary arbitration route.

A settlement or quitclaim should specify the covered transactions, gross amount, deductions, payment date, and whether any claims remain open. Read it before signing and request a copy.

Do not wait too long

Under Article 306 of the Labor Code, money claims arising from employment must generally be filed within three years from the time each cause of action accrued, or they are barred. For recurring commission shortfalls, each underpayment may have its own accrual date.

Mandatory conciliation is generally a prerequisite before an NLRC complaint, but workers should not assume that an internal grievance, HR discussion, or unanswered demand automatically preserves every deadline. The Supreme Court confirmed the mandatory conciliation requirement in Trinity University of Asia v. Caguioa. File early enough to avoid a prescription dispute.

Different periods may apply to claims such as unfair labor practice, illegal dismissal, or breach of a CBA grievance deadline. Obtain individualized advice when termination, union rights, or an approaching deadline is involved.

Common mistakes

Focusing only on the percentage and ignoring when the commission legally accrues.
Assuming a clause allowing revisions automatically covers past transactions.
Signing a new plan, quitclaim, or “full settlement” without checking its scope.
Relying on verbal assurances instead of requesting a written computation.
Comparing gross sales with a plan based on net collections, or vice versa.
Resigning immediately without assessing constructive-dismissal risks.
Taking confidential company or customer information unnecessarily.
Waiting while the three-year period runs.
Skipping the union grievance process where the CBA controls the dispute.
Treating an independent contractor’s commercial commission dispute as automatically covered by employee protections.

Frequently asked questions

Can an employer change the commission rate with notice alone?

Notice alone does not necessarily make the change lawful. The answer depends on the contract, CBA, commission plan, established practice, employee consent, and whether the change is prospective. Notice cannot ordinarily erase a commission that was already earned.

What if the contract says the company may change rates at any time?

That language strengthens the employer’s position regarding future commissions, but its exact scope still matters. It should not automatically be read as authorizing bad-faith, discriminatory, retaliatory, below-minimum, or retroactive reductions.

Can the employer raise quotas instead of lowering the percentage?

A quota change can also reduce actual compensation. Its validity depends on the governing agreement, the employer’s reserved authority, past practice, reasonableness, good faith, and whether it affects already earned pay. Courts will examine substance rather than form.

May commissions be charged back after a customer cancels or fails to pay?

They may be chargeable back if a valid plan clearly makes payment conditional on collection, non-cancellation, or another event. If the commission had already vested unconditionally, a later clawback is more questionable. The written plan and transaction records are decisive.

Does accepting one payroll at the lower rate mean the employee agreed?

Not necessarily, particularly if the employee objected or had no realistic opportunity to negotiate. But silence, repeated acceptance, or signing an amendment may be used as evidence of consent. Object promptly in writing if the reduction is disputed.

Are sales agents always employees?

No. A person called an “agent,” “freelancer,” or “independent contractor” may still be an employee if the actual relationship shows the employer’s right of control and economic dependence; conversely, a genuine independent contractor may need to pursue a contractual remedy outside labor tribunals. The Supreme Court applied these tests to commission-paid personal trainers in Aboitiz v. W Fitness Center.

What can a successful employee claim?

Depending on the facts and the tribunal’s findings, possible relief may include unpaid commission differentials and applicable legal interest. Constructive-dismissal remedies, damages, or attorney’s fees require separate legal and evidentiary bases and are not automatic.

Official sources

This article provides general Philippine legal information, not legal advice. Commission disputes are document- and fact-specific; consult DOLE, the employee’s union, or a Philippine labor lawyer for advice on a particular situation. Laws, procedures, and official guidance were checked as of September 2, 2026.