M-form Tax Return Netherlands — Expat Guide 2026
Moved to or from the Netherlands during the year? Learn when you need the Dutch M-form, why refunds are often higher, and how Benefitly can file it without your DigiD.
What is the M-form tax return in the Netherlands?
The M-form is the Dutch tax return for people who became or stopped being Dutch tax residents during the tax year. Expats who moved to or from the Netherlands often need it, and it can create larger refunds because income is split between Dutch and non-Dutch periods.
Key Facts
- Required when you arrive or leave during the year
- Often creates higher refunds for expats
- Can be filed for past open tax years
- Processing can take longer than a normal P-form
- Benefitly can file it without asking for your DigiD
Step-by-step PDF guide
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Get the tax return PDF guide before filing or asking Benefitly to handle it.
Step-by-Step Process
- 1
Confirm you moved during the tax year
If you registered in the Netherlands or deregistered part-way through the year, the M-form may apply instead of the standard Dutch tax return.
- 2
Collect income documents
Gather jaaropgave documents from Dutch employers plus foreign income information for the same year.
- 3
Separate Dutch and foreign periods
The M-form asks for income, deductions, and residence details split across your Dutch and non-Dutch periods.
- 4
File through the correct route
The M-form is more complex than the normal P-form. Benefitly can file through an official authorization route instead of using your DigiD.
- 5
Wait for Belastingdienst assessment
Processing may take several months. Once approved, the refund is paid to your registered bank account.
Helpful Tips
- M-form refunds can exceed normal tax refunds when you arrived mid-year
- Do not file a standard return if Belastingdienst expects an M-form
- Keep foreign income records even if tax was paid outside the Netherlands
- If you left the Netherlands, make sure your correspondence address is still reachable
Quick Answer for Expats
The M-form is the Dutch tax return for people who became or stopped being Dutch tax residents during the tax year. Expats who moved to or from the Netherlands often need it, and it can create larger refunds because income is split between Dutch and non-Dutch periods.
- Required when you arrive or leave during the year
- Often creates higher refunds for expats
- Can be filed for past open tax years
- Processing can take longer than a normal P-form
Choose the DIY ebook if you want to handle it yourself, or use Benefitly if you want guided support.
Start Eligibility CheckFrequently Asked Questions
No. You usually need it only if you became or stopped being a Dutch tax resident during the tax year.
Yes. Many expats receive larger refunds because they did not work in the Netherlands for the full year but tax was withheld at full-year rates.
Yes. Benefitly can use an official authorization route where applicable, so you do not need to share your DigiD credentials.
It can take longer than a normal tax return because Belastingdienst reviews residence periods and foreign income details.
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