Official tool is now open for people in France to estimate their 2025 income tax bill

Residents in France can now use an official simulator to estimate their income tax bill for 2025. 

The simulator is offered by French tax authorities and is available now – roughly one month before income tax declarations open. Income declarations this spring relate to 2024 income and run alongside a ‘tax at source’ system in France.

The simulator offers two versions – a ‘simple’ mode where a person enters basic information about income such as salaries, pensions, rental income, etc, and common expenses such as child care and donation. 

A ‘complete’ simulator includes the ability to provide complimentary information, such as commercial activity, worldwide income, etc. 

The simulator will provide you with an estimate of your household’s revenu fiscal de référence (household taxable income or RFR) and an estimation of how much, if any, additional tax you may have to pay once the information from your spring declaration is known.

It allows people more time to prepare if they are expected to face a bigger tax bill. 

If you are required to pay more than €300 after making the official declaration this spring, this can be split into four payments between September and December as opposed to a single one-off payment in September 

The simulator is available online through the impots.gouv.fr website. It is only available to residents.

Everyone living in France must make a declaration this spring as must non-residents who received income from a French source in 2024, such as a French rental property.

As a reminder, tax brackets increased by 1.8% this year. 

Read more: Some good news for this year’s French income tax declarations

When will declarations open? 

Declarations are usually made online, unless it is a first declaration – in which case it is made via a paper form – or they have special dispensation to complete the form physically, such as a poor internet connection. 

It is possible to complete the declaration for roughly six to nine weeks before deadlines are enforced, with those missing the deadline facing additional financial penalties.

The exact date of the deadline varies – there are three tiered deadlines depending on the commune where you live / your main property is located. 

Currently, there is no official information from the tax authorities over when declarations will be available this spring, although it is usually in April. Various French media sources are reporting dates between April 10 and April 13. 

Read more: Tax, boilers, vehicles: 9 changes in March 2025 in France