Deducting child support from French income tax: the rules and the real saving

Yes, if the child does not live mainly with you and is not counted in your family quotient. Service-public.fr explains that you deduct the amount set by the judge, indexed where relevant, plus costs in kind paid directly on top (school meals, school fees, medical costs). Costs of exercising visiting rights, such as travel, are not deductible.

Yes. Without a judgment, support is still deductible if it matches the maintenance obligation, meaning the child’s needs and your means, and if you can prove the payments. Keep your bank transfer records: the tax office may ask for them. An amount clearly out of proportion to your income can be challenged.

In the deductible expenses section of the income tax return, on the line for maintenance payments made. Service-public.fr points to the official notice and the income tax brochure for the exact boxes. Supporting documents are not sent with the return: you keep them in case the tax office asks.

Because it is calculated on one family-quotient share, with the progressive scale for 2025 income, without the décote (low-income reduction) or the cap on family-quotient benefits. For a household with several shares, or close to the tax threshold, the real saving can differ: the official tax simulator gives the exact figure once your return is filled in.