M form – A mistake is easily made

Unfortunately, the M form is susceptible to a wide variety of possible mistakes. There are several reasons why these mistakes are made, not taking into account the many questions that need to be answered, often by expats who have only just moved to the Netherlands and need to file their M-form.

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1. M form not automatically received

Often, expats who move to the Netherlands don’t automatically receive an M-form. It is often unknown to expats that they need to file the migration form, so it is not uncommon that the P-form (for regular resident taxation) is filed instead of the M form, or no form is filed at all. If you aren’t sure whether to submit the migration form, then please contact us.

2. Refund potential

If you moved to the Netherlands and were employed part of the year, your employer will have taxed you monthly as if you were employed for the whole year. Therefore, a refund resulting from the migration form is not uncommon, depending on your situation. Feel free to contact us and we will check the refund potential in your situation.

3. Language

The M form is only available in Dutch. This adds another level of difficulty to the already extensive and complicated tax return. With google translate, or with help of a friend, it is possible to file it yourself if you do not know the Dutch language. However, mistakes are easily made. Many expats try themselves and find out later that they made a mistake, and consequently the tax return needs to be corrected.

4. Software

Nowadays, the M form can be submitted using the Mijn Belastingdienst website. However, when completing the tax return on Mijn Belastingdienst, the due amount or refund is not calculated. This means you could wait months before you know what the outcome of the tax return is. We file the tax return with our own software which directly calculates what you are entitled to, and therefore provides immediate clarity in regard to your tax liability.

5. Pre-filled information

The pre-filled information in the tax return often contains items that should not be declared in your tax return or does not contain items that should be declared. Therefore, it is very important to check whether you are filling your tax return correctly. Feel free to contact us if you are unsure.  

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As an expat and business owner, my income taxes can get pretty complicated. But thanks to the folks at J.C. Suurmond & zn., I don’t have to worry about getting things wrong or forgetting obscure tax rules. It’s great to feel like I have someone on my side dealing with the Dutch tax authorities. They’ve handled my taxes for years, and I hope they will for years to come. Thanks 🙏🏼”

– Brian Pagán-


“Work in the US, through secondment by a Dutch research institute. Sander was able to advise me on avoiding double taxation and other tricky questions, and help with filing taxes in NL during the last two tax seasons. Professional and prompt responses, can certainly recommend!”

– Roelof Smit –


“They are very helpful and responsive in the times of need. Good and clear communication of right information.”

– Mishanthini Sivasamy –

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Who are Suurmond Tax Consultants

Since 1986 expat and business tax advice in relation to the Netherlands is one of our areas if expertise we provide to our individual and/ or business clients.

In addition, we can also assist in a variety of other cross-border situations. We will ensure you are compliant as well and that you pay no more tax than needed. Examples include advising clients as to starting a business in The Netherlands, accounting, property tax, and amnesty ruling. We file all types of  tax returns and specialise for example in the 30% ruling and 183-days rule consequences. The value we can add with our fiscal advice, is a key focus point to us. Also, what should not be overlooked, is the fact that a correct tax return will prevent future issues and penalties. This is essential when moving to a new country, or when setting up a business in a new country. 

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J.C. Suurmond & zn. Tax Consultants
Zwarte Zee 100
3144 DE Maassluis
T: +31 (0)10-3033701
E: taxadvice@jcsuurmond.nl


General information

CoC register: 27224918
VAT: NL 8016.36.668.B.01