13th Month Pay Computation Calculator

What the 13th month pay is

The 13th month pay is a benefit Philippine law requires from private employers. Presidential Decree No. 851 (1975) started it as a one month basic salary for lower paid employees, and Memorandum Order No. 28 (1986) extended it to all rank and file employees no matter how much they earn. It is not a gift or a company choice. An employer who skips it owes the money, and the Department of Labor reminds employers of the deadline every year.

Rank and file means everyone below the managerial level, in any employment status, so probationary, seasonal, project based and piece rate workers all qualify once they have worked at least one month in the calendar year. Employees already receiving a Christmas bonus of at least the same size under a company policy may be treated as covered, but the minimum standard itself never went away.

The formula DOLE uses

The DOLE Handbook on Workers' Statutory Monetary Benefits, 2024 Edition sets the computation in one line: total basic salary earned during the calendar year, divided by 12. That is the minimum. A collective bargaining agreement, an employment contract or an established company practice can push the amount up, but nothing moves it below this floor.

The handbook's own illustration follows an employee whose basic salary for the year reached 194,682.50 pesos, already reduced by unpaid absences. Divide by 12 and the proportionate 13th month pay is 16,223.54 pesos. The same arithmetic covers the steady case: a basic salary of 25,000 pesos a month with no absences builds 25,000 x 12 = 300,000 pesos for the year, and 300,000 / 12 = 25,000 pesos of 13th month pay.

Notice the divisor never changes. Someone who worked all 12 months and someone hired in November both divide by 12, because the calendar already did the prorating through the smaller total basic salary.

What counts as basic salary, and what does not

Basic salary, for this computation, is the pay for regular working hours. The DOLE handbook and Labor Advisory No. 13, Series of 2024, list the exclusions clearly, and the list is where most wrong computations come from. One important detail cuts the other way: if a company policy or agreement treats one of these benefits as part of basic salary, then it does belong in the total. The default rule, though, is exclusion.

A concrete contrast: an employee earns 15,000 pesos basic monthly, so the year's basic salary is 180,000 pesos and the minimum 13th month pay is 180,000 / 12 = 15,000 pesos. The same employee also received 40,000 pesos of overtime and 12,000 pesos of allowances during the year. Adding those in would give 232,000 / 12 = 19,333.33 pesos, but that is wrong under the default rule. Only a company policy that integrates those payments into basic salary changes the answer.

Worked example: a full year at a steady salary

Take an office worker with a basic salary of 25,000 pesos a month, paid for every working day from January to December, with allowances for transportation on top. Nothing reduces the monthly basic, so the year's total basic salary is 300,000 pesos and the 13th month pay is 25,000 pesos, equal to one monthly salary. The allowance never enters the math.

Two checks worth running on any payslip: the base should be the salary before deductions, since the law computes on gross basic pay, and the result should never be lower than one twelfth of the basic total even if the company paid a bigger bonus earlier in the year, unless that bonus was explicitly granted in lieu of the 13th month pay.

Partial years, absences and leaving mid year

The formula already handles every partial situation, because it works on what was earned. A worker hired on July 1 at a basic salary of 18,000 pesos a month collects six monthly salaries by December, so the year's total is 6 x 18,000 = 108,000 pesos, and the proportionate 13th month pay is 108,000 / 12 = 9,000 pesos. A worker who resigns in September with nine months at 22,000 pesos earned 198,000 pesos, so the payout is 198,000 / 12 = 16,500 pesos, and DOLE treats it as due regardless of who ended the employment.

Unpaid absences work the same way: they shrink the basic salary earned, and the smaller total shrinks the 13th month pay. Leave with pay does not reduce anything, because the basic salary for those days still counts. The 2024 handbook also adds that the salary differential paid to an employee on maternity leave belongs in the basic total, so it raises the payout slightly rather than lowering it.

The 90,000 peso tax exemption under the TRAIN law

Section 9 of Republic Act No. 10963, the TRAIN law, raised the tax free ceiling for 13th month pay and other benefits to 90,000 pesos a year, effective January 1, 2018. The ceiling is combined: the 13th month pay, Christmas bonus, productivity incentives and similar benefits all share one 90,000 peso bucket. Only the part above the bucket becomes taxable compensation income.

For most employees the arithmetic ends in zero tax. A 13th month pay of 25,000 pesos sits far below the ceiling, so nothing is withheld. Problems appear only at higher incomes: an employee whose 13th month pay is 25,000 pesos and who also received an 80,000 peso Christmas bonus has a combined 105,000 pesos, so the excess of 105,000 - 90,000 = 15,000 pesos is added to taxable income.

Deadlines and what happens if an employer is late

The deadline is December 24, fixed by the decree from 1975 and repeated in every DOLE advisory since. Some employers split the payment, releasing half around the school opening in June and the rest by December, and DOLE allows that as long as the final installment lands on time. The Bureau of Working Conditions' 2025 advisory adds that requests for exemption or for deferral of the payment are not allowed.

An employee who did not receive the 13th month pay, or received less than the minimum, can file a complaint at the DOLE regional office that covers the workplace, or raise it through the Single Entry Approach, which is the department's free conciliation process. Claims for unpaid 13th month pay follow the same three year prescriptive period that applies to money claims from the employment relationship.

What this calculator does not cover

The tool computes the statutory minimum from the numbers you type in. It does not know your company's internal rules, so a few situations deserve manual attention. If your employer pays a mid year half, enter only what has been received so far, and the remaining balance shown is what should arrive by December 24. If your company integrates allowances into basic salary, add them through the dedicated field rather than assuming they are automatic.

Managerial employees are outside the decree, though many companies grant them an equivalent bonus by policy. Government employees follow separate rules. Employees with multiple employers in one year can claim the proportionate 13th month pay from each one, since the entitlement attaches to each employment, not to the person. And where a collective bargaining agreement or company practice promises more than the minimum, the promised figure governs, because the law sets a floor and not a ceiling.