13th Month Pay Calculator Philippines
Estimate your 13th month pay in the Philippines based on your monthly basic salary and months worked during the calendar year. Use this calculator for both full-year and prorated scenarios, then check the guide below to understand which pay elements are included and excluded from the computation.
Updated March 17, 2026
13th Month Pay Calculator
Estimated 13th Month Pay
₱24,000.00
Full Year • 12 months counted
Computation Breakdown
Enter your regular basic monthly salary.
Choose full-year if you worked the whole year. Choose prorated if you worked only part of the year.
Computation Reference
13th month pay = total basic salary earned during the calendar year ÷ 12. Based on PD 851 and its implementing rules.
This estimate focuses on basic salary and may not reflect every payroll-specific classification.
This estimate follows the standard rule that 13th month pay is based on 1/12 of the basic salary earned within the calendar year.
Full-Year vs Prorated 13th Month Pay
If you worked the full calendar year, the estimate is usually based on your total basic salary earned during the year divided by 12. If you did not work the full year, the amount is usually prorated based on the basic salary earned during the months counted for the computation.
Both scenarios still use basic salary as the base. This is why the months worked matter when estimating 13th month pay.
How 13th Month Pay Is Computed
The standard idea is simple: add the employee's basic salary earned within the calendar year, then divide by 12. For a fixed monthly basic salary, this often becomes monthly basic salary multiplied by months worked, then divided by 12.
PD 851 and its implementing rule define 13th month pay as one-twelfth of the basic salary earned during the calendar year.
Formula
13th Month Pay = Total Basic Salary Earned During the Year ÷ 12
If monthly basic salary stayed the same, the estimate is usually straightforward.
What Is Included and Excluded in the Computation
The most important rule to understand is that 13th month pay is based on basic salary, not all forms of pay. Philippine rulings on PD 851 consistently treat basic salary as the computation base.
Usually Included
- regular basic salary
- fixed salary actually earned during the covered months
Usually Excluded
- overtime pay
- holiday pay
- night shift differential
- allowances
- commissions that are not part of basic salary
- non-cash benefits
If you are unsure whether a pay item counts, check your company payroll policy or labor guidance before relying on the estimate.
Sample 13th Month Pay Computations
These examples help show how the estimate works for common scenarios.
What This Calculator Includes
This page is designed for a simple 13th month pay estimate and does not replace payroll review.
- a basic salary-based estimate
- full-year and prorated scenarios
- calendar-year computation illustration
- simple term comparison support
What This Calculator Does Not Include
- automatic classification of every payroll item
- company payroll rules or legal advice
- determination of disputed pay items
This estimate focuses on basic salary and may not reflect every payroll-specific classification. Always check your company payroll policy for final amounts.
Why Your Actual 13th Month Pay May Be Different
Your actual 13th month pay may differ from a simple estimate for several reasons.
- your salary changed during the year
- payroll items were classified differently
- your employer already provides a 13th month pay equivalent
- case law around PD 851 may affect how compliance is measured
- additional company-specific compensation rules apply
Frequently Asked Questions
Related Payroll Pages and Guides
After estimating your 13th month pay, you may also want to review these related pages.
Use this estimate to plan for your 13th month pay
A 13th month pay calculator helps you estimate what you may receive based on your basic salary and months worked. Use it to plan your year-end budget or compare full-year and prorated scenarios.