Can I still get an extension for my income tax return?
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Detailed explanation, checklist and sources
That depends on the deadline in your filing invitation. The ordinary extension-request deadline for the 2025 return passed on 1 May 2026. If your invitation gives a different deadline that has not yet passed, an initial request using the official form may still be possible.
Dutch tax return 2025: help with filling it in
Prepare your Dutch income tax return for 2025. Choose your situation for explanations of 26 fields, examples, document checks and a downloadable guide.
On this page
1. Start with the date in your letter
This page concerns a first request for an extension to file a Dutch income tax return. Find the tax year and the deadline for receipt in your filing invitation. Note whether you have already received an extension. A tax adviser's filing scheme, a return for someone who has died or living abroad may involve a different procedure.
2. The ordinary deadline has passed
On the review date, 29 October 2026, the ordinary deadline for requesting an extension for the 2025 return has passed: it was 1 May 2026. If you were required to file then and did not, file as soon as possible. This page does not promise a new extension after your deadline has expired. Do not wait if you receive a reminder or a formal demand to file.
3. A different deadline may still be open
If your invitation gives a different filing deadline that has not yet passed, you can request an extension before that date. Compare the invitation with any previous extension confirmations. A request is not the same as approval; keep the request and check which final date is actually confirmed.
4. Use the official form
Outside the ordinary online period, the current official route is the Aanvraag uitstel aangifte inkomstenbelasting form. Download it from the Belastingdienst, complete it fully, print it, sign it and send it to the address on the form. It is intended for a first request. Your own general letter or our preparation download does not replace this form.
5. An extension has limits
If the extension is granted, the Belastingdienst states that you get four extra months. Sending a request does not automatically guarantee that extension. A tax partner must apply separately. An extension to file also does not mean that tax interest is waived. If necessary, ask an adviser to check which scheme and deadline apply to you.
6. Prepare and follow up
Use the checklist to record the year, invitation date, deadline and previous requests. Keep a copy of the form and proof of sending, and arrange to check the response. If the deadline has passed or a possible penalty is unclear, seek specific help. Our own assistance form is available; we do not submit an extension request for you.
Can I send your preparation download as an extension request?
No. Use the official form and the address printed on it. Our download only helps you gather information and follow up the response. Your partner must submit a separate request where necessary.
Documents to prepare
Prepare your next stepFill in and save · Word
Tick what you have checked or collected. Note what is missing and take your overview to a meeting.
Unless saved in My overview: Your entries stay only on this screen. Download before leaving; closing or reloading clears them. Do not enter identity numbers, passwords or unnecessary personal details.
What do you still need for your next step?
Item 1 / 6 · Where do you stand with this item?
Tax year for which you need an extension
This overview follows your own answers. It does not assess your rights or guarantee that your file is complete.
Your choices stay here. Use the buttons below if you want to save or download.
View all details, notes and timeline
Your timeline and evidence
List events and contacts. Note where you keep the evidence; no upload is needed.
What goes in my timeline?
Record what happened, when, the response and where to find the letter, message or photo. Mark uncertain dates.
Is my evidence sent?
No. You only note where it is kept. No files are uploaded or sent automatically.
How do I save my timeline?
Your entries are not saved automatically. Choose Save and continue later to store this preparation, including your timeline, in My overview. Wait for confirmation and save new changes again. You can also download a Word file without an account.
Up to 20 events. Choose a different position for an event to change the order.
0 / 6 · Checked or collected
For each event, note the date, what happened and where the evidence is kept. Example: 3 October — letter received — correspondence folder.
Describe the solution you would like, such as an explanation of a deduction and repayment of the outstanding amount.
For example: which document is missing, who can provide it and what should I do first?
Record the date and its source. If unknown, note this and check promptly. This tool does not calculate or monitor deadlines.
After your conversation
These are your own notes. Confirm agreements with the other person; these notes do not prove their agreement.
This is your preparation, not a submitted request, objection or legally reviewed document. A tick records only your own progress. Check the procedure and deadline in the original letter.
Save and continue later
Clear entries
Download anything you want to keep first. Clearing cannot be undone.
- Tax year for which you need an extension
- Filing invitation with deadline for receipt
- Previous extension: requested or actually granted
- Your circumstances and any tax-adviser scheme
- Separate tax-partner request if needed
- Official form, copy, proof of sending and response
Contact with a lawyer
You can use the chat and information without a phone number. A contact request requires a phone number, a verified email address and your wish for telephone contact. Our team assesses which partner fits your question. Data is shared only under the stated consent procedure. A partner or engagement is not guaranteed.
View the current application processSources
Need personal assistance? Request a lawyer through our chat. We explain the next step; submitting a request does not engage a lawyer. The links below support the legal information.
Belastingdienst · Uitstel aanvragen ↗Belastingdienst · Officieel uitstelformulier ↗Sources may be in Dutch. General information about Dutch law, not individual legal advice.