Total Fiscal Parts
3
Tax With Quotient Familial
0,00 €
Tax Without QF (1 or 2 parts)
634,00 €
Tax Saving from QF
634,00 €
Effective Tax Rate
0.0%
The QF advantage per additional half-part is capped at 1 791,00 €.
| Scenario | Parts | Tax | Saving |
|---|---|---|---|
| Single, no children | 1 | 3 965,00 € | - |
| Single, 1 child | 2 | 634,00 € | 3 331,00 € |
| Couple, no children | 2 | 634,00 € | 3 331,00 € |
| Couple, 2 children | 3 | 0,00 € | 3 965,00 € |
| Couple, 3 children | 4 | 0,00 € | 3 965,00 € |
How many fiscal parts do I have?
Single: 1 part. Married/PACS couple: 2 parts. First two children: +0.5 part each. Third and subsequent children: +1 part each. Single parents get an extra +0.5 part for the first child.
Is there a cap on the family quotient benefit?
Yes, the tax reduction per additional half-part beyond the base (1 for single, 2 for couple) is capped at €1,791 per year. This means high-income families cannot reduce their tax indefinitely by having more children.
What about shared custody?
In shared custody, each parent counts half the children's parts. For example, a single parent with shared custody of 2 children gets 1 + 0.25 + 0.25 = 1.5 parts instead of 1 + 0.5 + 0.5 + 0.5 (single parent bonus) = 2.5 parts.
Compliance: This calculator uses official French tax rates for 2025. Results are indicative — for complex situations, consult a tax professional.
How the quotient familial reduces your income tax based on family size
What is the quotient familial?
The quotient familial is a system that divides your household income by the number of "parts" (fiscal shares) based on family size before applying tax brackets. A single person has 1 part. A married couple has 2 parts. Each of the first two children adds 0.5 parts, and each child from the third adds 1 part. This effectively lowers your marginal tax rate.
How does it work in practice?
If a married couple with 2 children earns €80,000 net taxable, they have 3 parts (2 + 0.5 + 0.5). Income per part = €80,000 ÷ 3 = €26,667. Tax is calculated on €26,667 then multiplied by 3. Without the quotient, the full €80,000 would hit the 30% bracket. With it, each part stays mainly in the 11% bracket, saving thousands of euros.
Is there a cap on the benefit per child?
Yes. The tax saving from each half-part for children is capped at €1,759 in 2025. So even if your income is very high, the maximum benefit from each child is limited. For a family in the 45% bracket, the cap means the third child (1 full part) saves at most €3,518 in tax — not the unlimited amount the calculation might suggest.
How do single parents benefit?
A single parent (parent isolé) raising children alone gets an extra 0.5 part on top of the normal allocation. So a single parent with 1 child has 2 parts (1 + 0.5 for single parent + 0.5 for child) instead of 1.5 parts. This gives a significant tax advantage — on a €40,000 income, it can save about €1,500 in tax.
Does PACS give the same benefit as marriage?
Yes. Since 2005, PACS partners file a joint tax return with 2 parts, exactly like married couples. You get the full benefit of the quotient familial. However, you must file jointly from the year of your PACS — you cannot choose to file separately like in some other countries. Cohabiting couples (concubins) without PACS each file as single persons with 1 part.
When do children stop counting for the quotient?
Children count as dependants (enfants à charge) until they turn 18, or until 21 if not working, or until 25 if they are students. After these ages, they can choose to be rattachés (attached) to your household or file their own return. If they are rattachés, you get the extra parts but must include their income in your return.
DGFiP-Aligned: Based on 2025 DGFiP rates and thresholds. For personal advice, speak to a qualified expert-comptable (chartered accountant).
Disclaimer: This calculator provides estimates based on current French tax rates and thresholds for the 2025 tax year. It does not constitute professional tax, financial, or legal advice. Your actual liability may differ depending on your individual circumstances. Always consult a qualified tax adviser before making financial decisions. Read our terms
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