Depending on your department, here are the deadlines for declaring your income in 2026.
Like every year in spring, the income declaration campaign returns with a precise timetable to be respected in 2026. The opening of the online service takes place at the beginning of April, then the deadlines vary depending on the department of residence, with several deadlines staggered until the beginning of June. For taxpayers affected by the paper version, a separate deadline is also provided, earlier in the season. It is therefore better to quickly check the date applicable to your situation in order to avoid any delay and to complete your declaration within the deadlines set by the tax administration. Here are the 2026 income declaration deadlines depending on your department:
| Due date | Date |
|---|---|
| Opening of the 2026 tax campaign | Thursday April 9, 2025 |
| Paper declaration | Deadline for submission: Tuesday May 19, 2026 at 11:59 p.m. |
| Online declaration (departments n°1 to 19 and non-residents in France) |
Deadline: until Thursday May 21, 2026 |
| Online declaration (departments n°20 to 54) |
Deadline : Thursday May 28, 2026 |
| Online declaration (departments no. 55 to 974 and 976) |
Deadline : Thursday June 4, 2026 |
| Receipt of the tax notice | Between July 24 and July 31, 2026 |
| Reimbursement of overpayment | Between July 24 and July 31, 2026 |
| Regularization for tax credits | Summer 2026 |
After sending the declaration, the tax administration calculates the final amount of tax due for 2025 income and makes the tax notice available in the particular space between July 24 and 31, 2026. For those who still receive a paper document, the sending takes place between July 23 and August 28, 2026, or until August 20, 2026 when a balance remains. pay.
If the taxpayer has been overtaxed or is entitled to a refund linked to their tax reductions and credits, the reimbursement occurs in principle on July 24 or July 31, 2026. On the other hand, if an amount remains due, it is automatically withdrawn from the bank account communicated to the administration: in one go on September 25, 2026 if the balance is less than or equal to 300 euros, or in four monthly installments, from September 25 to December 28 2026, if this amount exceeds 300 euros.
