Box by Box: your 2026 Dutch tax return, worked out first

Your 2026 Dutch tax return, worked out before you open Mijn Belastingdienst

For people living in the Netherlands with a job plus something extra: freelance work, a side business, letting your home for short stays, savings, or property abroad. Answer only the questions that apply to you. You get a verdict, an estimate split into the bills you will actually receive, and the screens of the online return with the usual mistakes marked.

Runs in this browser. Nothing you type is sent anywhere or saved.

Never asks for your BSN, DigiD or bank details.

Does not file for you. You file yourself.

You are looking at an example: Ana, salary €52,000, freelance profit €9,000, €80,000 in savings, a flat in Ireland.

Screen by screen

The online return in the order you will meet it, with only the screens that apply to you. Section names follow the Belastingdienst's own training material for the 2025 return; the 2026 return may word them slightly differently.

I understand these figures are estimates and that I am responsible for my own return.

When you want a person

Free

BelastingTelefoon: 0800 0543, from abroad +31 55 538 5385. Monday to Thursday 8:00–20:00, Friday 8:00–17:00.
Belastingdienst help with your return: phone, video or a visit, in Dutch or English. Business owners are called back instead.
Union members: FNV (not for self-employed) and CNV. They need a machtigingscode, never your DigiD login.

Paid: any adviser

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What this tool never asks for, and nobody legitimate needs from you by email or phone

Your BSN
Your DigiD login or SMS code
Bank account or card numbers
Home address or date of birth
Your employer's name
Your original documents

The Belastingdienst never asks for personal details by email, SMS or WhatsApp. How to spot fake messages.

What this test version doesn't cover

If any of these apply, the estimate above will be wrong or incomplete. Check with the Belastingdienst or an adviser.

Moving to or from the Netherlands in 2026. You file an M form instead.
Reaching AOW age, which changes the rates.
Partial non-residence under the 30% ruling (the last year it is available is 2026).
Your own home: the notional rental value (eigenwoningforfait) and mortgage interest.
Personal deductions such as gifts, healthcare costs, alimony and study costs.
Box 2 (a substantial shareholding of 5% or more in a company).
Income from a job abroad, foreign pensions and benefits.
Investment deductions (KIA), business losses carried over from other years, and VAT.
The actual-return route for Box 3 (werkelijk rendement). If your real return was lower than the fixed rates assume, you can report it in the return and may pay less. With property abroad it can also shrink the reduction for that property, and the law on this is not settled.
The combination tax credit for parents (inkomensafhankelijke combinatiekorting).

Sources and rules used

The Box 3 rates for bank balances (1.28%) and debts (2.70%) are provisional. They are fixed early in 2027. Last year the bank rate moved from 1.44% to 1.37%.

When an assessment follows is set by law (art. 9.4 Wet IB 2001, as in force from 1 January 2026): when you owe more than €58, when you get back €19 or more, or when your Box 3 assets on 1 January exceed €38,479 (€76,958 with a fiscal partner).

The 1 May 2027 deadline and the extension to 1 September 2027 follow the rules for the 2025 return. The Belastingdienst publishes the 2026 dates early in 2027.

Terms, liability and privacy

What this is. A free tool that helps you estimate and prepare your Dutch income tax return. It is not tax advice, and using it does not make you anyone's client.

The estimate. It is indicative and simplified. You cannot derive rights from it. The Belastingdienst's assessment is what counts.

Your responsibility. You file your own return and you are responsible for its content, including checking the figures the Belastingdienst fills in for you, and for meeting deadlines.

Liability. As far as the law allows, we are not liable for loss from using these estimates. Nothing here limits liability for intent or conscious recklessness (opzet of bewuste roekeloosheid), or any right you have as a consumer that cannot be excluded.

Privacy. Everything is calculated in your browser. Nothing you type is sent anywhere, and nothing is saved: closing the tab clears it. The page loads no fonts, scripts or trackers from other sites. Like any web page, the host that serves it may log your IP address when the page loads.

Language. This tool is in English, with Dutch terms shown so you can match them to the official screens. Where they differ, Dutch law and the Belastingdienst's own publications prevail.

Not affiliated. This tool is not made by or connected to the Belastingdienst or the Dutch government.

Found a mistake? Tell us; every correction is dated in the update log.

Your 2026 Dutch tax return, worked out before you open Mijn Belastingdienst

First, three questions

Your job

Freelance work or side business

Guests in your own home

Savings, investments and property

Your healthcare allowance