Every November, Filipino employers scramble to compute 13th month pay. Despite being one of the most common payroll tasks in the country, it is also one of the most frequently done incorrectly. Business owners include the wrong components in the base, use the wrong divisor, or miscalculate the tax exemption — costing them money or creating compliance exposure.
This guide covers everything: the legal basis, who is covered, the correct formula, deadlines, tax treatment, and the five most common mistakes employers make.
Legal Basis: Presidential Decree 851
13th month pay is mandatory under Presidential Decree No. 851, signed on December 16, 1975 by President Ferdinand Marcos Sr. The Department of Labor and Employment (DOLE) has issued several implementing rules and guidelines since then, most recently updated to reflect the TRAIN Law's tax treatment changes.
The law is not optional. Failure to pay 13th month pay is a labor law violation that can result in DOLE enforcement action, back pay orders, and penalties.
Who Is Covered?
All rank-and-file employees who have worked at least one (1) month during a calendar year are entitled to 13th month pay, regardless of:
- Employment status (regular, probationary, contractual, project-based)
- Nature of work (piece-rate, time-based, output-based)
- Method of payment (daily, weekly, semi-monthly, monthly)
Who is NOT covered?
Managerial employees (those who have the power to hire, fire, and discipline employees, or who formulate management policies) are not covered by P.D. 851. However, many employers voluntarily extend 13th month pay to managers as a best practice and a retention tool.
Government employees are covered by a different scheme under the Salary Standardization Law.
The Correct Formula
The basic formula for 13th month pay is:
13th Month Pay = Total Basic Salary Earned During the Year ÷ 12
For employees who worked all 12 months, this equals one full month's basic salary. For employees who worked less than 12 months, it is prorated.
What Is "Basic Salary"?
This is where most employers go wrong. Basic salary includes only the base pay — it excludes:
- Overtime pay
- Holiday pay premiums
- Night differential
- Allowances (transportation, meal, clothing, representation)
- Commissions (unless these are part of the basic compensation by company policy or contract)
- Bonuses
- Cash equivalents of unused leave
Only the pure basic pay counts in the computation base.
Proration for Partial-Year Employees
If an employee was hired mid-year or resigned before December, you prorate based on the number of months actually worked:
13th Month Pay = (Total Basic Salary for Months Worked) ÷ 12
Days worked vs months worked
DOLE guidelines treat a month as having been worked if the employee was present for at least one day in that month. Fractions of a month are counted proportionally — if an employee worked 15 out of 26 working days in a month, that month's basic pay is (15/26) × monthly rate.
Worked Example: Full-Year Employee
Employee: Juan dela Cruz
Monthly basic salary: ₱18,000
Period employed: January – December 2025 (full year)
Total basic salary earned = ₱18,000 × 12 = ₱216,000
13th month pay = ₱216,000 ÷ 12 = ₱18,000
Juan receives ₱18,000 as his 13th month pay.
Worked Example: Partial-Year Employee
Employee: Maria Santos
Monthly basic salary: ₱22,000
Period employed: April 1 – December 31, 2025 (9 months)
Total basic salary earned = ₱22,000 × 9 = ₱198,000
13th month pay = ₱198,000 ÷ 12 = ₱16,500
Maria receives ₱16,500.
Worked Example: Daily-Rate Employee
Employee: Pedro Reyes
Daily basic rate: ₱750
Working days per year: 286 (5 days per week × 52 weeks, minus holidays)
Days actually worked: 260
Total basic salary earned = ₱750 × 260 = ₱195,000
13th month pay = ₱195,000 ÷ 12 = ₱16,250
Do not use the daily rate × 26 shortcut
Some employers estimate by multiplying the daily rate × 26 (days in a month). This is only accurate if the employee worked every single working day. For any absences or partial-year employees, you must use actual days or basic pay earned — not the shortcut.
Deadline for Payment
13th month pay must be paid on or before December 24 of every year.
Employers may pay the 13th month in two tranches if both are paid by December 24:
- First tranche: on or before May 15 (many companies tie this to mid-year bonus)
- Second tranche: on or before December 24
Paying in two tranches is allowed but not required. Some companies pay everything in December. What matters is that the full amount is received by the employee by December 24.
Don't confuse 13th month with Christmas bonus
13th month pay is a legal mandate. A Christmas bonus is a discretionary management benefit. They are separate. Paying a 13th month pay does not satisfy a separate Christmas bonus commitment you may have made, and vice versa.
Tax Treatment: The ₱90,000 Exemption
Under the TRAIN Law (Republic Act 10963), 13th month pay and other benefits (such as productivity bonuses, performance incentives, and Christmas bonuses) are exempt from income tax up to a combined total of ₱90,000 per year.
How the exemption works:
If an employee receives:
- 13th month pay: ₱22,000
- Performance bonus (mid-year): ₱30,000
- Total other benefits: ₱52,000
The total is ₱52,000 — well within the ₱90,000 threshold. No tax withheld.
If another employee receives:
- 13th month pay: ₱60,000
- Year-end bonus: ₱50,000
- Total other benefits: ₱110,000
Excess over ₱90,000 = ₱20,000
This ₱20,000 is subject to income tax and must be included in the employee's taxable compensation.
Track cumulative benefits year-round
Because the ₱90,000 cap covers all "other benefits" including mid-year bonuses, productivity pay, and 13th month, you need to track the running total for each employee throughout the year — not just at December payroll. Akauntants does this automatically.
DOLE Reporting Requirement
Employers are required to submit a 13th Month Pay Compliance Report to the DOLE Regional Office by January 15 of the following year. The report covers:
- Business name and address
- Total number of employees covered
- Total amount of 13th month pay paid
- Date of payment
Failing to submit this report can draw a DOLE inspection. The form is available on the DOLE website or at your regional DOLE office.
Common Employer Mistakes
Mistake 1: Including overtime, allowances, and bonuses in the base
The single most common error. Some employers compute 13th month based on total earnings (including OT, allowances, and commissions) rather than basic salary only. This overpays employees and may inflate your computation base for future years.
Fix: Strip out everything that is not basic salary before computing.
Mistake 2: Using 13 as the divisor instead of 12
P.D. 851 and all DOLE guidelines are clear: the divisor is 12, not 13. Dividing by 13 produces a lower (and incorrect) result.
Fix: Always divide total basic salary by 12.
Mistake 3: Forgetting probationary and contractual employees
Many employers assume only regular employees get 13th month pay. P.D. 851 says any employee who has worked at least one month during the calendar year is covered — regardless of employment status.
Fix: Include all employees (regular, probationary, project-based, contractual) who met the one-month minimum service threshold.
Mistake 4: Not prorating for mid-year hires and resignees
Some employers pay a full month's salary to an employee who only worked 6 months, or pay nothing to one who resigned in November. Both are wrong.
Fix: Always prorate based on actual months/days of service during the calendar year.
Mistake 5: Missing the December 24 deadline
Payment after December 24 is a labor law violation — even if it's December 26. DOLE inspectors take this seriously, especially if an employee complains.
Fix: Run your 13th month payroll in the first or second week of December to give yourself time to process and release payment before the 24th.
How Akauntants Handles 13th Month Pay
Akauntants tracks each employee's basic salary earned throughout the year separately from OT, allowances, and other extras. At any point in the year, you can preview the 13th month pay computation for every employee — prorated automatically for mid-year hires and resignees. When December arrives, the payroll run includes the 13th month computation already done, and the DOLE compliance report is generated automatically.
This guide reflects DOLE and BIR regulations as of 2026. Always confirm current rules with your DOLE Regional Office or labor lawyer for complex cases involving piece-rate workers, homeworkers, or apprentices.
Akauntants Team
The Akauntants team writes practical accounting and tax guides for Philippine small business owners. Our content is reviewed for BIR compliance accuracy.
April 5, 2026 · 7 min read
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