What is 13th Month Pay and What Law Mandates It?
The 13th month pay is a mandatory monetary benefit required by Presidential Decree No. 851, signed by President Marcos Sr. in 1975 and amended by its Revised Guidelines. It is a statutory bonus equal to at least one-twelfth (1/12) of an employee's total basic salary earned during the calendar year.
The 13th month pay is distinct from a Christmas bonus. The Christmas bonus, if any, is a discretionary benefit. The 13th month pay is a legal obligation. Every covered employer that fails to pay it on time faces administrative complaints, labor standards violations, and potential DOLE inspection findings.
As of 2025, the 13th month pay rules remain unchanged from their latest revision. HR teams must understand the formula, deadlines, tax treatment, and covered employees to execute this correctly every year.
Who is Covered by the 13th Month Pay Law?
The 13th month pay applies to all rank-and-file employees who have worked for at least one (1) month during the calendar year, regardless of their position designation, employment status, or method of wage payment. This includes:
- Regular (permanent) employees
- Probationary employees
- Project-based employees
- Seasonal employees
- Part-time employees
- Piece-rate employees
- Employees on extended sick leave or maternity leave (provided they received basic pay during the year)
Who is NOT covered:
- Managerial employees (those who have authority to hire, fire, and discipline, or whose primary duty is managing the enterprise)
- Household helpers and personal service employees (kasambahay are covered under the Kasambahay Law, which provides a separate benefit)
- Workers who are paid on a purely commission basis
- Employees of distressed establishments that have been exempted by the DOLE Secretary
13th Month Pay Formula and Computation Examples
The correct formula under DOLE guidelines is:
13th Month Pay = Total Basic Salary Earned During the Year ÷ 12
What counts as "basic salary":
- Regular basic pay (monthly rate × months worked)
- Pro-rated pay for incomplete months
What does NOT count as basic salary:
- Overtime pay
- Night shift differential
- Holiday pay (extra pay, not basic)
- Cost of Living Allowance (COLA) unless already integrated into basic pay
- Profit-sharing payments
- Cash equivalent of unused vacation leave (unless company policy integrates it)
- Non-cash benefits (housing, food, transportation)
Example 1 — Full year, regular employee:
Basic salary: ₱25,000/month × 12 months = ₱300,000 total basic salary earned
13th month pay: ₱300,000 ÷ 12 = ₱25,000
Example 2 — Employee hired in June (7 months worked):
Basic salary: ₱20,000/month × 7 months = ₱140,000 total basic salary earned
13th month pay: ₱140,000 ÷ 12 = ₱11,667
Example 3 — Employee with leave without pay (3 months unpaid):
Basic salary earned: ₱18,000 × 9 months = ₱162,000
13th month pay: ₱162,000 ÷ 12 = ₱13,500
The key insight: the divisor is always 12 (months in a year), never the number of months actually worked. This means employees who worked fewer months receive a proportionally smaller benefit — but the formula is based on total earnings, not an average monthly rate.
Tax Treatment of 13th Month Pay in 2025
Under the TRAIN Law (RA 10963), the 13th month pay and other bonuses are exempt from income tax up to ₱90,000. This threshold covers the combined total of:
- 13th month pay
- Christmas bonus (if any)
- Other productivity bonuses
- Cash gifts
If the total of these benefits exceeds ₱90,000, only the amount above the threshold is subject to income tax and withheld accordingly. Payroll officers must track the cumulative amount of these benefits across the full calendar year.
Practical example: An employee receives ₱25,000 as 13th month pay and a ₱5,000 Christmas gift. Total = ₱30,000, which is below ₱90,000. No tax withheld on this amount.
Another employee receives ₱80,000 as 13th month pay, a ₱15,000 performance bonus. Total = ₱95,000. The excess of ₱5,000 (₱95,000 − ₱90,000) is subject to income tax.
Payment Deadline and Common Employer Mistakes
Deadline: The 13th month pay must be paid on or before December 24 of each year. DOLE allows employers to pay it in two tranches — the first tranche on or before May 31, and the second on or before December 24 — if this arrangement is agreed upon or stipulated in a CBA or company policy.
Common mistakes Philippine employers make:
- Including overtime pay in the base: Overtime is not part of "basic salary" for 13th month computation. Including it results in overpayment or at minimum an incorrect figure that may confuse employees.
- Using net pay instead of basic salary: Some employers mistakenly compute based on take-home pay after deductions. The formula uses gross basic salary earned, not net pay.
- Excluding probationary employees: Probationary employees are covered from day one. Excluding them is a labor standards violation.
- Deducting absences incorrectly: Authorized absences with pay (sick leave, vacation leave with pay) should still count as basic salary earned. Only unpaid leave without pay should reduce the base.
- Paying late: Missing the December 24 deadline, even by one day, exposes the employer to a DOLE complaint.
How EngageHRIS Automates 13th Month Pay Computation
EngageHRIS tracks all salary transactions throughout the year, making 13th month pay computation accurate and effortless. The payroll module automatically:
- Accumulates each employee's basic salary earned per month, properly excluding overtime, allowances, and other non-qualifying items
- Accounts for mid-year hires, resignations, and salary changes automatically
- Flags the ₱90,000 threshold and computes withheld tax on excess correctly
- Generates a 13th month pay report by department, employee group, or company total
- Sets reminders for the December 24 deadline
For HR teams managing dozens to hundreds of employees, manual spreadsheet computation of 13th month pay is a significant error risk. Request a free demo and see how EngageHRIS handles it in minutes.