Calculate your estimated 13th month pay based on your basic salary earned during the year. Choose a fixed monthly salary or enter a month-by-month breakdown if your pay changed. This free tool runs in your browser, uses Philippine pesos (₱), and does not require an account.

Disclaimer

This calculator provides an estimate for informational purposes only. Actual 13th month pay may vary depending on your employment status, basic salary, compensation structure, company policies, employment contract, collective bargaining agreement, applicable labor rules, and payroll adjustments. This tool is not legal, tax, or professional payroll advice. For authoritative guidance, consult the appropriate Philippine government agency or a qualified professional.

The calculator focuses on the commonly used formula of total basic salary earned during the calendar year divided by 12. It is not presented as universally applicable to every worker. Review current Department of Labor and Employment (DOLE) materials for official coverage, payment timing, and computation guidance.

How to Use 13th Month Pay Calculator (Philippines)

Follow these steps to estimate 13th month pay from basic salary earned during the year:

• Choose a calculation method — Fixed Monthly Salary if your basic salary stayed mostly the same, or Monthly Salary Breakdown if it changed during the year.
• Enter monthly basic salary — use basic pay only, excluding compensation that does not form part of basic salary.
• Enter months worked — a whole number from 0 to 12 for the fixed-salary method.
• Optional advanced adjustment — enter unpaid-leave or similar amounts that should be excluded from total basic salary earned. Leave this blank if you are not sure.
• Or fill January through December — if you use monthly breakdown, enter the basic salary earned in each month. Empty months are treated as ₱0.
• Click Calculate 13th Month Pay — review the estimated amount, total basic salary, months worked, and average monthly basic salary.
• Copy or reset — copy the result for your records, or reset the calculator without reloading the page.

You can also click Try an example to fill ₱25,000 per month for 12 months and see how the formula works.

Who should use 13th Month Pay Calculator (Philippines)

This free tool is for people who want a clear estimate of 13th month pay without creating an account or sending salary details to a server.

• Private-sector employees in the Philippines checking expected year-end pay.
• HR staff and payroll assistants preparing a first-pass computation.
• Employers and small-business owners estimating employee 13th month pay.
• Employees who worked only part of the year and need a prorated estimate.
• Employees whose basic salary increased during the year and want a month-by-month computation.
• Job seekers comparing compensation packages that mention 13th month pay.

It is not a replacement for official payroll records, a DOLE ruling, or advice from a lawyer, accountant, or payroll professional. Coverage can depend on employment status and current labor regulations.

What Is 13th Month Pay?

13th month pay is additional compensation commonly computed from basic salary earned during the calendar year. In plain terms, it is often about one-twelfth of the basic salary you actually earned from January through December, subject to applicable Philippine rules, company policy, and your employment contract.

Employees who did not work the full year can still receive a prorated amount based on the basic salary they earned during the months they worked. This calculator estimates that amount from the figures you enter.

How Is 13th Month Pay Calculated?

The calculator uses this commonly applied Philippine formula:

13th Month Pay = Total Basic Salary Earned During the Calendar Year ÷ 12

For a constant monthly basic salary, that is the same as:

Estimated 13th Month Pay = Monthly Basic Salary × Months Worked ÷ 12

"Basic salary earned" in this tool means the basic pay amounts you enter for the covered months, minus any optional adjustment you choose to exclude. It does not automatically include overtime, holiday pay, night-shift differential, or allowances.

What Counts as Basic Salary?

This calculator is based on basic salary earned. Whether a particular payment forms part of basic salary can depend on its nature, the applicable regulations, employment contract, company policy, or collective bargaining agreement.

Amounts that may be treated differently include allowances, overtime pay, holiday pay, premium pay, night-shift differential, and similar additional compensation. Enter only the basic salary figures that apply to your situation, and confirm the treatment of other pay items with your employer or a qualified professional.

Example Calculation

Monthly basic salary: ₱25,000. Months worked: 12.

₱25,000 × 12 ÷ 12 = ₱25,000 estimated 13th month pay.

Total basic salary earned is ₱300,000. Dividing that total by 12 also equals ₱25,000.

Example With a Salary Increase

If your basic salary changed during the year, add the amounts actually earned each month instead of using only the latest rate. Example:

• January–June: ₱25,000 each month
• July–December: ₱30,000 each month

Total basic salary: (₱25,000 × 6) + (₱30,000 × 6) = ₱330,000. Estimated 13th month pay: ₱330,000 ÷ 12 = ₱27,500.

Use Monthly Salary Breakdown for this situation so the estimate reflects the salary you actually earned, not only the rate after a promotion or increase.

What If I Worked Less Than a Full Year?

The same formula still applies: divide the basic salary you actually earned by 12. You do not need to have worked all 12 months to estimate a prorated amount.

Example: monthly basic salary ₱30,000, months worked 8.

₱30,000 × 8 = ₱240,000 total basic salary earned. ₱240,000 ÷ 12 = ₱20,000 estimated 13th month pay.

Frequently Asked Questions

What is 13th month pay in the Philippines?
It is additional compensation commonly computed from basic salary earned during the calendar year. This calculator estimates that amount using total basic salary earned divided by 12.

How do I calculate my 13th month pay?
Add the basic salary you earned during the year, then divide by 12. For a fixed monthly rate, multiply monthly basic salary by months worked, then divide by 12.

Is 13th month pay based on basic salary?
The standard computation used here is based on basic salary earned. Treatment of other compensation can depend on applicable rules, your contract, company policy, or a collective bargaining agreement.

What if I did not work for the entire year?
Use the basic salary you actually earned and divide by 12. The result is a prorated estimate based on the months you worked.

What if my salary increased during the year?
Use Monthly Salary Breakdown and enter the basic salary for each month. Adding only the latest monthly rate for the whole year can overstate or understate the estimate.

Is overtime included in 13th month pay?
Overtime and other additional compensation may be excluded from basic salary under applicable rules, subject to your circumstances. This calculator does not add overtime automatically.

Are allowances included?
Treatment depends on the nature of the allowance and applicable rules. Enter basic salary only unless you have confirmed that a specific amount should be included.

When is 13th month pay usually paid?
Philippine rules generally require payment by a statutory deadline near the end of the calendar year. Confirm the current deadline and any company schedule in official DOLE guidance and your employer's payroll calendar.

Is 13th month pay taxable?
Tax treatment can depend on current Bureau of Internal Revenue (BIR) rules and exemption thresholds. This calculator does not estimate tax, withholding, or take-home pay.

Does this calculator guarantee my actual 13th month pay?
No. It is an estimate based on the information entered. Actual entitlement can depend on employment status, compensation structure, company policy, contracts, and current labor regulations.

Is this 13th month pay calculator free?
Yes. You can use it as often as you like at no cost, with no account required.

Are my salary figures stored?
Calculations run in your browser. See Privacy Information below for details.

Official Sources

For authoritative guidance, review official Philippine government materials rather than unofficial blogs. Useful starting points include:

• Department of Labor and Employment (DOLE)
• Official Gazette of the Republic of the Philippines
• Bureau of Internal Revenue (BIR), when reviewing tax treatment.

Last reviewed: August 2026. Review official sources again if coverage, computation rules, payment deadlines, or tax treatment change.

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Privacy Information

Your salary information is calculated directly in your browser. We do not need your salary information to calculate the result. Monthly basic salary, months worked, optional adjustments, and month-by-month amounts are used only on your device. Web4pps does not require an account to use this tool, and these calculator inputs are not sent to our servers for storage. Do not enter information you are uncomfortable keeping on your own device while using the page.