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Calculate pro-rated 13th-month pay by months worked.
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For millions of workers across the Philippines, Brazil, and dozens of other countries, 13th month pay is not a bonus — it's a statutory right. Whether you're an employee verifying your entitlement or an HR team running the year-end payroll calculator, understanding how 13th month pay is calculated (and prorated) prevents underpayment and compliance risk.
13th month pay is an additional payment equal to (or based on) one month's salary, paid to employees on top of their regular 12 months of compensation. In many countries it is a legal mandate — not discretionary — and non-payment carries penalties.
It is distinct from a Christmas bonus or end-of-year gift. A 13th month pay benefit is a defined entitlement computed from a specific formula, often tied to the employee's total basic salary earned during the year.
| Country | Legal Basis | Amount | Typical Payment Timing |
|---|---|---|---|
| Philippines | PD 851 — mandatory for all private sector | 1/12 of total basic salary earned | On or before December 24 |
| Brazil | Law 4090/1962 — mandatory for all employees | 1 month's salary (paid in 2 installments) | Nov 30 & Dec 20 |
| Mexico | Federal Labour Law Art. 87 | Minimum 15 days' salary | Before December 20 |
| Colombia | Labor Code — mandatory | ~1 month's salary (calculated on all earnings) | June & December |
| Indonesia | Minister of Manpower Regulation | 1 month's salary | Before religious holiday (Eid) |
| Various others | Italy, Spain, parts of Africa, Middle East (by contract) | Varies 0.5–1 month | Varies |
The Philippine formula (one of the most widely referenced in Asia) is used by the monthly salary calculator above and forms the basis for most 13th month calculations globally:
13th Month Pay = Total Basic Salary Earned in the Year ÷ 12
Example: Employee earned $24,000 basic salary over 12 months → $24,000 ÷ 12 = $2,000
For monthly salary workers who worked the full year, this simplifies to:
13th Month Pay = Monthly Basic Salary (for full-year employees)
Example: $2,000/month × 12 months = $24,000 ÷ 12 = $2,000
Employees who did not work the full calendar year — due to mid-year joining, resignation, or unpaid leave — receive a prorated 13th month pay:
Prorated 13th Month = Total Basic Salary Earned During Period ÷ 12
Example: Joined in May, earned $16,000 basic (8 months) → $16,000 ÷ 12 = $1,333.33
Enter total basic salary earned and months worked above for an instant, prorated 13th month pay result.
In the Philippines and most jurisdictions, 13th month pay is based on basic salary only — overtime pay, allowances, holiday pay, and discretionary bonuses are excluded from the computation. Always verify the specific statutory definition of "basic salary" in your jurisdiction, as some countries include all regular earnings.
Taxability depends on the country. In the Philippines, 13th month pay is exempt from income tax up to PHP 90,000 per year (combined with other benefits). Amounts above the cap are taxable. In Brazil and other Latin American countries, 13th month pay is subject to normal income tax and social security contributions.
Yes, in most jurisdictions. Resigned employees are entitled to a prorated 13th month pay covering the period they worked during the calendar year. The payout should be included in their final settlement. Denying it constitutes non-compliance with labor law in countries where it is mandated.
No. A Christmas bonus is discretionary — the employer decides whether and how much to pay. 13th month pay is a statutory entitlement that must be paid according to the legal formula regardless of company performance or management decisions. In some countries, employers pay a 14th month (sometimes called a Christmas bonus) on top of the mandatory 13th month.
Disclaimer: This calculator is for informational purposes only and does not constitute legal or financial advice. We do not guarantee the accuracy or completeness of the results. Please consult a qualified professional for advice specific to your situation.