When you visit this website, a small text file (a “cookie”) gets saved on your computer. This enables us to measure the number of visits and which pages are most read.

Out tracking tool, Matomo, is set up in compliance with the “Cookies” recommandations from the French data privacy authority, the CNIL, which allows the lack of prior consent. In particular, your IP address is anonymised before any visit is tracked.

I contribute to your data, can I access it?

Of course! The usage data for the OpenFisca website is public.


OpenFisca does not collect nor handle any personal information.

Applications built with OpenFisca may collect personal information and send some of it to OpenFisca for the purpose of calculations. The engine does not store, nor transfer, the data it is sent.