Key Tax Dates 2023: Don’t Miss These Crucial Deadlines!

No one wants to receive a letter from the tax authorities or pay a penalty for a late payment. Yet, this happens more often than one might think: tax returns sent too late, unreported moves or changes in circumstances, rejected direct debits… Every year, taxpayers find themselves penalized for not keeping up with the tax calendar. Generally, the dates are similar from year to year, or at least, they occur around the same period.

This year, the tax calendar has been somewhat disrupted due to the late adoption of the Finance Law of 2025. The tax administration is set to officially unveil it on April 10th – the opening day of the 2025 tax campaign and the online filing service for all citizens, including those not liable for tax, but several key dates are already known. Here they are:

Once the paper or online declaration is submitted, taxpayers receive their tax notice during the summer, which verifies the income they declared. Also, by the end of July, some might receive a refund for overpayment. Essentially, this is when the tax authorities return money because they collected more taxes than were due. The summer is also the time for the adjustment of tax credits, notably when families receive their balance for childcare expenses.

In September, some taxpayers need to settle the balance of their tax due, which affects those who still owe money to the tax authorities because they underpaid during the year or received an overly large advance on tax reductions or credits at the beginning of the year. Come fall, the adjustment of the withholding tax rate is also implemented. In any case, you can find the detailed tax calendar for both individuals and businesses on the impots.gouv.fr website. Simply type “individual tax calendar” or “business tax calendar” in the search bar, and you’re all set!