Extra-payment calculator
13th & 14th month salary calculator
Enter your gross monthly salary and see what an extra 13th or 14th month is actually worth after income tax and social contributions. The extra payment is taxed on top of your normal annual income, so the net is usually a smaller share of gross than your regular pay.
How the extra month is taxed
- Because income tax is progressive, an extra monthly payment is taxed at your top marginal rate, so its net share is lower than your regular payslip.
- Social contributions usually apply to the extra payment too, unless it falls above a contribution cap.
- Some countries pay only a 13th month; others add a 14th (or a holiday allowance in place of it).
- The 13th month is often paid in December, and the 14th in summer — timing does not change the annual tax, only the cash-flow.
Country
Frequently asked questions
Is the 13th month taxed more than my normal salary?
Not separately, but because it is added on top of your annual income it is taxed at your highest marginal rate, so its effective rate is usually higher than your average rate.
Which countries pay a 13th or 14th month?
Many European countries pay a 13th month, and several add a 14th. In a few, such as Italy and Spain, it is required by law; elsewhere it is contractual or discretionary.
Do social contributions apply to the 13th month?
In most countries, yes — the extra payment is part of gross salary for contributions, subject to each country's annual cap.