The standard deadline for your Dutch tax return is 1 May. Can't make it? You can request an extension until 1 September via Mijn Belastingdienst, by phone (0800-0543) or in writing. If you fail to file, the Tax Authority estimates your income and issues a default assessment — often higher than your actual situation. You also risk a negligence fine of EUR 469 (first offence) up to EUR 6,709 (repeat offenders). At Jan de Belastingman, we help you request extensions, catch up on overdue returns (up to 5 years back) and avoid unnecessary fines. Fixed price from EUR 249.
Step 1 of 3|Choose your question
Choose what best matches your situation below. Not sure yet? Pick the last option.
From requesting extensions to catching up on overdue returns
We request an extension from the Tax Authority, giving you until 1 September. Through our Becon scheme, we can even obtain a longer extension.
Included
Multiple years unfiled? We catch up on overdue returns — up to 5 years back. Voluntary disclosure can reduce fines.
Included
Late filing can result in fines and interest. We help you limit the damage and file objections where possible.
Included
Atanas Youroukov
Expat with RSU & overseas properties
“I requested support regarding RSU (Restricted Stock options) from my employer and my overseas properties. The team handled everything with professionalism. The tax advice report was concise with clear action steps.”
Daniel Gold
International client
“Mila and team were super responsive to my requests and came up with a very well priced package that perfectly addressed my needs. They ended up refunding me the portion I didn't use. Very honest company. Would 100% work with them again.”
Wolfgang Koeth
Double taxation question
“Even without being registered as a client I got quick and competent advice on a question on double taxation.”
Sofia
Expat tax client
“Very responsive and nice team that provided a tailored assessment of my situation and gave clear guidance on how to navigate taxes.”
Quick and correct, even if you're late
We review your situation: how many years behind, whether assessments have been issued, and what the risks are.
Our tax specialists prepare your return(s) with all relevant deductions and check for accuracy.
We file your return(s) and, if needed, object to any fines or default assessments that have been issued.
No more deadline stress
Fixed price, no surprises
Catch up on multiple years at once
Challenge fines where possible
Personal guidance until completion
Missing the deadline for your tax return? These are the consequences and options.
Standard deadline
1 May
Final date for submitting your tax return for the previous year.
Extension until
1 September
Extended deadline after requesting an extension via Mijn Belastingdienst, phone or post.
Negligence fine (1st)
EUR 469
Fine for not filing or filing your return late without an extension.
Max. negligence fine
EUR 6,709
For repeat late filing, the fine can increase up to this amount.
Tax interest 2026
5.0%
Interest charged by the Tax Authority on late or corrected assessments.
Collection interest 2026
4.3%
Interest on overdue tax payments.
Catch up to
5 years back
You can file overdue returns up to 5 years back (in 2026, that means back to 2021).
M-form extension
1 November
For emigration/immigration, the deadline is 1 July, with an extension until 1 November.
Sources: Belastingdienst · Belastingdienst
Answers to the most frequently asked questions about extensions, deadlines and fines. /chat Ask your question
Tax matters don't have to be complicated. We make sure you know exactly where you stand — and that you never pay more than necessary.
Luuk
Tax Specialist & Director
As the person ultimately responsible, Luuk leads our team of tax specialists and ensures the quality of every tax return and every piece of advice. With years of experience at leading firms, he knows exactly where the opportunities lie — and makes sure you benefit from them.