Swiss 13th Month Salary Calculator (Pro Rata)
Calculate the 13th month salary in Switzerland pro rata: one twelfth of the monthly salary for each month worked, for new starters and leavers.
A 13th salary is only due if the contract or collective agreement provides it; if it does, it is paid pro rata when the job starts or ends during the year. A bonus that depends on results is different and may not be pro rata.
What it does
Most Swiss contracts pay the annual salary in 13 parts: twelve monthly salaries and a 13th in November or December. Someone who joins or leaves during the year gets one twelfth of the monthly salary for each month worked. Social contributions and tax are deducted from the 13th as from any salary.
How to use it
- Type your monthly gross salary.
- Type the months worked this year.
- Read the 13th salary due.
The arithmetic runs in your browser. Nothing you type is sent anywhere and nothing is stored, so you can use these with real numbers.
Frequently asked questions
How much 13th salary after 7 months on CHF 6,000?
6,000 × 7 ÷ 12 = CHF 3,500 gross.
Is the 13th salary mandatory?
No, only if the contract or a collective agreement provides it.
Is the 13th salary taxed?
Yes, AHV and other contributions and, for withholding tax payers, tax are deducted.
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