Dutch tax return 2025: complete guide for 2026

Filing your 2025 tax return: what you need to know

In spring 2026 it is time to file your Dutch income tax return for 2025. Whether you are employed, self-employed, or recently moved to the Netherlands, this guide covers the main deadlines, documents, deductions, and common mistakes.

Deadlines

If you received a filing letter from the Belastingdienst, you must file. The online 2025 income tax return becomes available in Mijn Belastingdienst on 1 March 2026.

• 1 March 2026 - online filing opens
• 1 May 2026 - normal filing deadline
• 1 September 2026 - deadline if you requested an extension in time

File too late without an extension and you risk a default penalty of EUR 469.

What do you need?

For everyone

• DigiD
• Annual income statement(s)
• BSN
• IBAN for any refund

Home ownership

• WOZ assessment for 2025 with reference date 1 January 2024
• Annual mortgage statement
• Information relevant for the deemed rental value

Healthcare costs and donations

• Overview of specific healthcare costs not reimbursed by insurance
• Proof of donations to ANBI charities

If you are self-employed

• Profit and loss account for 2025
• Balance sheet as at 31 December 2025
• Hours log for the 1,225-hour criterion if relevant
• Investment overview for KIA

Tax brackets for 2025

Your 2025 income tax is calculated in three brackets:

Tax credits such as the general tax credit and employment tax credit reduce the final amount due.

Step by step

1. Log in and review

Log in with DigiD. The pre-filled return contains information from employers, banks, and insurers, but you should still verify the data yourself.

2. Add your deductions

Review all deduction categories: home ownership, healthcare costs, gifts, paid partner alimony, annuity premiums, and if relevant your entrepreneur deductions.

3. Review and submit

Check the summary, see whether you receive a refund or need to pay, and submit the return.

4. Wait for the assessment

The Belastingdienst often responds quickly, but formally has longer. For tax year 2025 the final assessment must generally be imposed by the end of 2028, with that period shifting if you received an extension. If you receive a refund, it is usually paid within about 1 week after the date on the assessment.

Prefer to outsource your return? Our specialists can handle the whole process. See our individual filing service or start with a free tax check.

Deductions you should not miss

Mortgage interest

Mortgage interest is deductible up to a maximum rate of 37.48% in 2025.

Healthcare costs

Specific healthcare costs not reimbursed by insurance may be deductible above the applicable threshold.

Charitable donations

Donations to ANBI charities can be deductible. Ordinary gifts are subject to thresholds and limits; periodic gifts are treated differently.

Public transport travel deduction

If you commute by public transport and pay those costs yourself, you may qualify for a fixed travel deduction. It is not a deduction of your actual public transport costs.

Self-employed deductions

If you meet the 1,225-hour criterion, you may qualify for:

• Self-employed deduction - EUR 2,470 in 2025
• Starter's deduction - an extra EUR 2,123
• SME profit exemption - 12.70%

Together these can make a major difference for entrepreneurs.

Common mistakes

1. Filing too late

The EUR 469 penalty is easy to avoid if you file on time or request an extension in time.

2. Forgetting deductions

Healthcare costs and donations are often overlooked.

3. Trusting the pre-filled return blindly

The pre-filled return can contain missing or incorrect information.

4. Not using fiscal partnership well

Fiscal partners can often allocate certain deductions strategically.

5. Reporting box 3 incorrectly

For the 2025 return, the Belastingdienst still starts with deemed returns in box 3. The tax-free allowance is EUR 57,684 per person, and the deemed return rates include 1.37% for bank balances and 5.88% for investments and other assets. In the 2025 return you can also report your actual return; the Belastingdienst then uses the more favorable outcome.

Recognise one of these issues? Then it is smart to have your return checked before you file it.

When to hire an expert

• Self-employed or entrepreneur - VAT, bookkeeping, and entrepreneur deductions add complexity. See our self-employed filing service.
• Recently moved to the Netherlands - M-form returns and multi-country taxation are more complex.
• DGA - the interaction between your BV and private tax position needs specialist input.
• Filing after a death - emotionally and administratively difficult.
• Major wealth changes - such as a sale of property or inheritance.

Not sure whether you need help? Use our free tax check.

Summary

Your 2025 Dutch tax return does not have to be stressful. Gather your documents, review the deductions that apply to you, and file before 1 May 2026. If you want certainty, let a tax specialist handle it for you.