13th salary calculator
Calculate your 13th salary, proportional to months worked, including deductions.
Net 13th salary
$2,733.39
Gross 13th (proportional)$3,000.00
1st installment$1,500.00
2nd installment$1,233.39
INSS$253.41
Income tax$13.20
The 1st installment has no deductions; INSS and tax are taken on the 2nd. Reference tables 2025.
How the calculation works
The proportional 13th is salary × (months worked ÷ 12). A month with 15+ days worked counts as a full month.
It is paid in two installments: the 1st (half of gross) with no deductions, and the 2nd with INSS and income tax.
Frequently asked questions
When do I get the 13th?
The 1st installment by Nov 30 and the 2nd by Dec 20.
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Updated on June 17, 2026 · by Rafael Rossi · Methodology & sources