How to use them
Each calculator uses the official 2026 method, the same brackets, credits, deemed returns and limits the Belastingdienst publishes. Rough numbers are fine to start with. Change any figure and the result updates as you type.
They are estimates for orientation. A payslip includes pension contributions and rounding, and a tax return includes deductions these pages do not ask about. When you want the figures applied to your whole situation, with a forecast that shows what happens when your ruling ends and a coach who explains it, that is what Helder Money does.
Want the background first?
The tax guide for internationals explains the 30% ruling, box 3, income tax, toeslagen, pensions and buying a home in plain English, with every 2026 figure on one page.