Simulateur

Check whether you are affected by the differential contribution on high incomes (2025 revenues)

  • Public concernéTaxpayer resident in France of which the reference tax income exceeds €250,000 for a single person, or €500,000 for a married or former couple (subject to joint taxation)
  • Nombre d’étapes3 steps
  • LangueLanguage French
  • CalendrierDeclaration of the differential contribution on high incomes (CDHR) and payment of the deposit between 1er and 15 December 2026 (2027 CDHR based on 2026 revenues)

Go to the simulator

Comment faire ?

  1. Specify items of the calculation: family situation, amount of income, expenses to be deducted, possible reductions and tax credits, etc.
  2. Specify withholding tax already paid
  3. Get an estimate of the amount of the CDHR

Please note

The simulation corresponds to the basic tax return and the supplementary return.

  • Income amounts by categories (wages, pensions, property income, etc.)
  • Total withholding taxes paid
  • Advance on your tax reductions and credits at the beginning of the year.

The simulation is anonymous.

The calculation shall be made solely on the basis of the data provided by the taxpayer.

Some boxes are precocious, but they do not necessarily correspond to the taxpayer's situation.

The result of the simulation is used to assess the amount of income tax due and, possibly, that of the CDHR. But it is not a tax notice.

If you are subject to the CDHR, you will make your declaration between 1er and December 15 in your online space.

Taxes: access your Public Finance space

You will also have to pay a deposit of CDHR (equal to 95% of the estimated contribution) between 1er and December 15.

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Verified 11 March 2026 - Public Service / Directorate of Legal and Administrative Information (Prime Minister)