From 28 April 2026, you can submit the Belgian personal income tax return for the 2025 income year (assessment year 2026). This tax return is mandatory for all residents of Belgium.
Depending on your personal situation, three different submission deadlines apply:
- Paper tax return: no later than 30 June 2026
- Electronic tax return via MyMinfin: no later than 15 July 2026
- Tax return with specific income (such as foreign professional income): no later than 16 October 2026 via MyMinfin
If you receive specific income but wish to submit a paper tax return, the deadline of 30 June 2026 still applies.
If you receive a proposal for a simplified tax return, have specific income and wish to make use of the extended deadline until 16 October 2026, please contact the Federal Public Service (FPS) Finance. You can do so by phone at +32 2 572 57 57 (code 17001).
To complete the tax return correctly, you will need, among other things, the following documents:
- your annual income statement;
- payslips;
- the insurance policy of your Dutch health insurance, if applicable;
- tax certificates.
Make sure you gather these documents in good time and keep them carefully. If necessary, they can be attached to the tax return.
For assistance with completing the tax return, you can contact the FPS Finance. Staff of the FPS Finance provide support by telephone or, in exceptional cases, by appointment. This assistance is available until 29 June 2026, inclusive. You can easily make an appointment yourself via the following website: https://fin.belgium.be/nl/particulieren/belastingaangifte/indienen/belastingaangifte/hulp/online-afspraak-maken (only available in Dutch, French or German).
Do you not live in Belgium? Then this tax return is not relevant for you. The Non-Residents Income (NRI) tax return can only be submitted from early September 2026 onwards. In principle, you will receive an invitation by post. The deadline for submitting the NRI tax return is 20 November 2026.