If you work in the Netherlands as an employee, you can file your own Dutch income tax return (aangifte inkomstenbelasting). You only need your BSN and your annual statement (jaaropgaaf), no accountant and no KvK. The return for tax year 2025 is filed in 2026: it opens on 1 March and the deadline is 1 May 2026 (or 1 September with an extension). With Taxmo you enter your salary and deductions, see your refund instantly, and file directly to the Belastingdienst. The calculation is free; you pay €49 (Box 1) or €79 (with Box 2 or Box 3) only when you file.
You must file if the Belastingdienst sends you an invitation (aangiftebrief) or if you owe more than a small threshold. Even if you are not required to file, it is often worth it: with mortgage interest, medical costs, donations, or a mid-year job change you frequently get money back. If you were not invited, you can file voluntarily up to five years back to claim a refund.
Your BSN, your date of birth, and the jaaropgaaf from each employer (gross annual salary and withheld wage tax, loonheffing). If you own a home, your WOZ value and the mortgage interest paid. For Box 2 and Box 3, the amounts of your substantial shareholding, savings, and investments. Taxmo applies the official 2025 brackets and tax credits for you.
Taxmo files your full return directly via Digipoort, the same secure channel that tax advisors use. Your BSN and data are encrypted and used only to file your return. Prefer to upload it yourself? Download the official XBRL file and submit it in Mijn Belastingdienst.