About this tool
The 13th salary (décimo terceiro) is one extra monthly pay per year, proportional to the months worked: each month with at least 15 days counts as one twelfth. The first instalment, half of the amount, is paid by 30 November with no deductions; the second, by 20 December, carries the INSS and the income tax on the whole 13th. Income tax on the 13th is calculated apart from the salary, and the 2026 reduction of Lei 15.270 cancels it up to R$ 5,000. The average of overtime and commissions is included. Everything is calculated in your browser.
How to use it
- 1 Type the gross salary and the monthly average of overtime and commissions in the year.
- 2 Choose the months worked in the year (a month counts from 15 days).
- 3 Add dependents and any court-ordered alimony.
- 4 Read the net 13th salary and how much comes in each instalment.
Frequently asked questions
How is the proportional 13th calculated?
Divide the monthly pay by 12 and multiply by the months worked in the year. A month counts when at least 15 days were worked in it.
When are the instalments paid?
The first, half of the gross 13th, by 30 November (or with the vacation, if requested); the second by 20 December, with INSS and income tax on the whole amount deducted.
Is there income tax on the 13th salary?
Yes, taxed apart from the monthly salary (exclusive taxation), with the same monthly table, deductions and the 2026 reduction: no tax on a 13th of up to R$ 5,000.
Do overtime and commissions count?
Yes. The average of the variable pay received in the year is added to the salary for the 13th.
13th salary in 2026
In Brazil, the first instalment, with no deductions, is due by Monday 30 November. The second, with INSS and income tax, is due by Friday 18 December.
Guide
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