What is the CSG?

Written by Solvo · based on official sources · Published on 10 September 2026

In brief: The CSG is the generalized social contribution, a social contribution within the French system that applies to several categories of income.

The definition of the CSG

CSG stands for generalized social contribution. It concerns, in particular, earned and replacement income, income from assets and investment income.

Earned and replacement income

Earned income is linked to carrying out a professional activity. Replacement income includes, in particular, certain pensions and allowances.

For this income, the CSG may be withheld at source by the employer or, for certain benefits, by the organization paying them.

Income from assets and investment income

The CSG also applies to income from assets and investment income. These two categories are subject to separate rules:

You must therefore identify the category of income concerned in order to determine the rules applicable to the CSG.

Informational content, does not constitute personalized tax advice.

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Official sources

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