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By when do I need to submit my tax return?

Submission deadlines for the 2025 tax return

Self-prepared tax return:

The regular submission deadline is 31 July 2026. There is no automatic extension for 2024.

Prepared by a tax advisor or income tax assistance association:

In this case, the deadline is automatically extended to 28 February 2027.

Submission deadlines for the tax return

 

Early request by the tax office

The tax office may request an earlier submission in individual cases. In this case, be sure to meet the individually set deadline to avoid late fees.

Application for extension

If you cannot submit the return on time, apply for an extension before 31 July 2026. Approval is at the discretion of the tax office and should be well justified (e.g. illness, stay abroad, missing documents).

Consequences of missing the deadline

After the deadline, you will usually receive a reminder with a new submission date. If you still do not submit, fines and penalties may be imposed.

Deadline for voluntary submission

For a voluntary tax return (without obligation), the deadline is 31 December 2029. However, early submission can lead to a faster tax refund.

By when do I need to submit my tax return?