GAC – EPA

Le site des retraités du CERN et de l’ESO
The CERN and ESO pensioners site

Swiss Franc Exchange Rate for 2025 Tax Return in France

Dear members

CERN has just published the Swiss Franc exchange rate to be used for the 2025 income tax declaration in France:
https://home.cern/news/official-news/cern/exchange-rate-tax-declaration-form-2025-income

1 CHF =1.07 Euros

This year, the two methods that we described last year:

  • Either use the exchange rate mentioned above, determined by the French fiscal administration for income received in 2025.
  • Or use the exchange rate valid on the day of receipt of the pension payment and repeat the operation for all the payments

give the same result after rounding.

To our knowledge, the instructions for filling the tax forms that were published on our site in April 2025 are still valid. Since these instructions were given in French we prefer to direct you to the French versions:

We remain available to GAC-EPA members who would like assistance or clarification.