In the Philippine labor landscape, the 13th-month pay is a mandatory benefit codified under Presidential Decree No. 851. While the general rule—one-twelfth ($1/12$) of the total basic salary earned within a calendar year—seems straightforward, its application becomes nuanced when an employee is absent for extended periods due to maternity or prolonged illness.
1. The Legal Basis and General Formula
All rank-and-file employees are entitled to 13th-month pay, provided they have worked for at least one (1) month during the calendar year. The benefit must be paid no later than December 24 of each year.
The standard computation is as follows:
$$\text{13th Month Pay} = \frac{\text{Total Basic Salary Earned During the Calendar Year}}{12}$$
What constitutes "Basic Salary"?
Under the law, basic salary includes all remunerations or earnings paid by an employer to an employee for services rendered. However, it generally excludes the following unless stipulated otherwise in a Collective Bargaining Agreement (CBA):
- Cost of Living Allowance (COLA)
- Profit-sharing payments
- Overtime pay and night shift differentials
- Holiday pay
- Unused vacation and sick leave credits converted to cash
2. Impact of Maternity Leave (RA 11210)
Under the 105-Day Expanded Maternity Leave Law (Republic Act No. 11210), female employees are granted 105 days of leave (120 days for single parents).
Inclusion in Computation
For the purpose of 13th-month pay, the period an employee is on maternity leave is generally not considered as time "earned" in terms of basic salary.
- SSS Maternity Benefit: This is a social security benefit, not a salary paid by the employer. Therefore, it is excluded from the "Total Basic Salary Earned."
- Salary Differential: If the employer pays a salary differential (the difference between the employee's full salary and the SSS benefit), this differential is also generally excluded from the 13th-month pay computation unless company policy or a CBA specifically includes it.
Result: An employee who takes maternity leave will receive a proportionately lower 13th-month pay because their total basic salary earned for the year is reduced by the duration of their leave.
3. Prolonged Sick Leave and 13th-Month Pay
The computation for employees on prolonged sick leave depends on whether the leave is paid or unpaid.
Paid Sick Leave
If an employee uses their earned sick leave credits provided by the company, the payments received are considered part of the basic salary. Consequently, these periods do not reduce the 13th-month pay.
Unpaid Sick Leave (Leave Without Pay)
If an employee exhausts their leave credits and remains on leave without pay, or if they are receiving SSS Sickness Benefits, those periods are excluded from the computation.
- Like maternity benefits, SSS Sickness Allowances are social security reimbursements, not wages paid by the employer for services rendered.
4. Illustrative Computation
Consider an employee with a monthly basic salary of PHP 30,000.
Scenario A: Full Attendance
If the employee worked the entire year: $$\frac{30,000 \times 12}{12} = \mathbf{PHP,30,000.00}$$
Scenario B: Maternity Leave (Approx. 3.5 months)
If the employee was on maternity leave for 105 days and received no salary from the employer during that period, she effectively earned her basic salary for only 8.5 months. $$\text{Total Basic Salary} = 30,000 \times 8.5 = 255,000$$ $$\text{13th Month Pay} = \frac{255,000}{12} = \mathbf{PHP,21,250.00}$$
Scenario C: Prolonged Unpaid Sick Leave
If an employee was on unpaid sick leave for 2 months: $$\text{Total Basic Salary} = 30,000 \times 10 = 300,000$$ $$\text{13th Month Pay} = \frac{300,000}{12} = \mathbf{PHP,25,000.00}$$
5. Summary Table of Treatment
| Item | Included in 13th Month Computation? |
|---|---|
| Monthly Basic Pay | Yes |
| Paid Sick Leave (Company) | Yes |
| Paid Vacation Leave (Company) | Yes |
| Maternity Leave Period (Unpaid by Employer) | No |
| SSS Sickness Benefit | No |
| Salary Differential (RA 11210) | Generally No |
| Overtime / Holiday Pay | No |
6. Important Considerations for Employers
- CBA and Company Policy: The rules above are the legal minimums. If a company policy or a Collective Bargaining Agreement states that maternity leave or unpaid sick leave shall be included in the 13th-month computation, the employer must follow the more liberal provision.
- Pro-rated Rule: If an employee resigns or is terminated before the end of the year, they are still entitled to a pro-rated 13th-month pay based on the total basic salary earned during the period they stayed with the company.
- Compliance: Failure to pay the 13th-month pay is a labor law violation that can lead to money claims filed before the Department of Labor and Employment (DOLE).