Request an extension, file late returns or catch up on multiple years — we take care of it.
No obligation · fixed price agreed upfront
Jan de Belastingman handles extensions and 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
Daniel Gold
31 reviews on Google
“Mila and team were super responsive to my requests and came up with a very well priced package that perfectly addressed my needs. I didn't end up using the full package and they even refunded what I didn't use. Highly recommend!”
Alvi Safira Syarifuddin
Local Guide · 12 reviews
“At first I wasn't so sure that a report would be enough to help me manage my issue alone, but all the steps are so clear that it was super easy! Definitely recommended and great value for the price!”
Robin Schirmer
Review on Google
“I really enjoyed using Jan de Belastingman. Super straightforward and helpful service. Highly recommend if you are looking to outsource your tax preparation.”
Gabriela Uzunova
Review on Google
“Would recommend for sure! Really helped me figure out how to claim back money from my income tax return and with really clear steps! Thank you!”
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.
Our promises
No more deadline stress
Fixed price, no surprises
Catch up on multiple years at once
Challenge fines where possible
Leave your details. A tax specialist from our team reviews your situation and quickly confirms the fixed price.
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.
Our team of tax specialists helps you with carefully prepared tax returns and clear tax advice. We consider your situation, explain your options in plain language and help you decide on the next step.
