tax-calculator.nl is now an iOS app. Everything that has been running on the web, salary, car tax, mortgage, holiday allowance, and the eigenwoningforfait calculator, is in your pocket now, no browser tab required.
What is in the app at launch
The income calculator, car tax (MRB), maximum mortgage, holiday allowance, and the eigenwoningforfait calculator are all free to use, no account needed. Mortgage deduction and the annual tax return calculator are there too, currently free for everyone while we run a free period on the whole app.
The calculators you actually reach for mid-conversation, checking a job offer with a recruiter, working out MRB before buying a car, looking up your eigenwoningforfait while a mortgage advisor is on the phone, rarely happen at a desk. A native app means those numbers are one tap away instead of a remembered URL and a slow mobile browser.
The app runs the same tax engine as the website: the same 2026 Box 1 brackets, the same 30% ruling logic, the same eigenwoningforfait bands. If you already use the web calculator, nothing about how the numbers are worked out changes, it is just available somewhere else now too.
This article reflects Dutch tax rules as of 2026. It is not tax advice, consult a qualified belastingadviseur for your specific situation.