Income tax: the 2025 simulator is online, here is how to calculate the amount to pay

The tax administration has just updated its 2025 income tax simulator. You can now know your invoice to pay for your income received in 2024. Here is the procedure to follow.

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The 2025 income declaration has not yet started, but the simulator which allows you to obtain a precise indication of your tax payable to the taxman is already available on the tax.gouv.fr site. The administration has just updated this tool, integrating the new income tax scale Modified by the 2025 finance law. You therefore do not have to wait for your tax return – which provides you after signature of the online form the final amount of your tax payable on your 2024 income – to know your tax bill for the past year.

To use this simulator, it’s very simple. Go to the tax site. You have a choice between the simplified model, if you receive a salary, a retirement pensionproperty income, etc., and the complete form, for example if you also declare income from commercial, liberal, agricultural activity or overseas investments. Once in the simulator, enter your civil status (married, PACS, single, divorced …), the year of birth of the declarants, your number of children and their date of birth, your income and that of your possible dependent people. If you only touch wages and do not benefit from discounts or tax creditsyour mission stops here. Otherwise, loads to you to register, line by line, missing information. Then click on “Validate” at the bottom of the form.

How do you know if you need money to the taxman?

You then get several crucial information for your various approaches. First of all, the amount of your treatments and wages and then that of your reference tax income (RFR), after reduction for professional expenses of 10%. It is this RFR which is then applied by the 2025 scale of the income tax of 2024. A scale whose Five slices were revalued by 1.8% This year, in terms of inflation outside tobacco noted in 2024.

Lower, the forecast amount of your tax appears, at the line “net income tax”. A total from which all of your samples will be subtracted at the source of 2024, during your income tax to be carried out in the spring. An operation that you can perform yourself in order to find out now if you will have to pay a balance of the taxman from next September or if, on the contrary, The tax administration will reimburse you an overpayment.