Tax deadlines in Germany split people into two groups, and which one you are in changes everything. Here is where the 2025 return stands as of now.
If you were required to file
For most people who must submit a return — because you had multiple employers, drew certain benefits, run a side business, or were married with specific tax-class combinations — the deadline for the 2025 return was 31 July 2026. That date has passed. If you were obliged to file and have not, submit as soon as possible: the Finanzamt can charge a late-filing surcharge (Verspätungszuschlag) of at least €25 for each month overdue, and interest on anything owed.
One exception buys time: if a tax adviser (Steuerberater) or a Lohnsteuerhilfeverein prepares your return, the deadline is pushed to around 30 April 2027.
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If filing is voluntary
If you are a regular employee on one salary, you usually are not obliged to file at all — which means you are in no trouble, and you have four years to submit voluntarily. The 2025 return can be filed any time up to the end of 2029. The reason to bother: most voluntary filers get money back. The average refund runs well into the four figures, from commuting costs, home-office days, insurance, and work expenses your employer over-withheld on.
In short: if you were required to file and missed July, act now to limit penalties. If filing is optional, there is no rush — but there is very likely a refund sitting there waiting for you.
Zahid Hossain
German Diary — Study, Work and Live in Germany