When is the deadline for tax return 2025?
The official deadline for the income tax return for tax year 2025 is Thursday 1 May 2026. This is the latest date by which your tax return must be received by the Belastingdienst (Dutch tax authority), unless you have applied for an extension.
| Situation | Deadline |
|---|---|
| Standard personal tax return | 1 May 2026 |
| Extension applied for (yourself) | 1 September 2026 |
| Tax return via tax adviser (beconregeling) | 1 May 2027 |
| Tax return from abroad (C-form) | 1 July 2026 |
| Tax return for deceased (F-form) | 8 months after death |
Note: Have you submitted your tax return before 1 April 2026? Then the Belastingdienst (Dutch tax authority) is required to respond before 1 July 2026. If you submit later, it can take months before you receive a notification about a refund.
Why is this deadline so important?
Filing late has immediate financial consequences. The Belastingdienst automatically imposes a default penalty if you still have not filed a tax return after 1 May 2026 and have not applied for an extension.
- First default: fine from €385
- Repeated default: fine up to €5,514
- Intentional non-filing: offence penalty up to 100% of the tax owed
In addition to the fine, you may also have to pay tax interest if you owe tax. In 2026 the tax interest is 6.5% per year and starts from 1 July 2026.
What should you do now?
Depending on your situation there are three options:
| Your situation | What to do |
|---|---|
| I have time and knowledge | File the tax return yourself via Mijn Belastingdienst with DigiD |
| I need more time | Apply for an extension (free, until 1 September 2026) |
| I want it taken off my plate | Let us handle it – we arrange everything for €59 |
This is how to apply for an extension: Log in to Mijn Belastingdienst → go to "Personal details" → click on "Apply for extension". You can do this up to and including 1 May 2026. The extension then runs until 1 September 2026.
Have your tax return done by Belastinghulp Zaanstad
Did you not get round to it? No DigiD? Or not sure if you have everything correct? We handle it for you — quickly and correctly. Even close to the deadline we can still file your tax return.
How we work:
- Call or WhatsApp us — you get a reply within 24 hours
- Home visit or digital meeting — you choose whichever you prefer
- We collect the data — annual statements, WOZ, bank details
- Tax return submitted — within a few days, well on time
- You receive a copy — plus a clear overview of your refund or payment
Working via a power of attorney? No DigiD? No problem. We can also file your tax return via an official authorisation. You don't need to log in yourself.
What if I have missed the deadline?
Did you miss 1 May 2026? Don't wait any longer. The Belastingdienst first sends a reminder and then a warning. If you don't respond, the Belastingdienst (Dutch tax authority) will estimate your income themselves — often to your disadvantage — and you will receive an assessment that is usually higher.
Good news: you can file a tax return up to 5 years back. Filing sooner prevents higher fines and ensures you still receive any refund. We also help with late tax returns and corrections of old years.
Help in Zaanstad and surroundings
We come to your home in Zaandam, Krommenie, Assendelft, Wormerveer, Koog aan de Zaan, Zaandijk, Westzaan, Wormerland and Oostzaan. Fixed price €59, including a check of all benefits and deductions.
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