All calculators are free, require no registration, and run entirely in your browser — your data never leaves your device.
See how the 30% ruling affects your net salary. Compare with vs. without the ruling and understand the 2027 reduction to 27%.
Calculate wealth tax on your savings, investments, and debts. Includes the forfaitaire rendement and fiscal partner optimization.
Estimate your annual refund or additional payment based on your jaaraangifte. Includes deductions for mortgage, donations, and Box 3.
All tax brackets, rates, and thresholds come directly from Belastingdienst publications for the selected tax year.
Parameters are refreshed every January when the Belastingdienst publishes new figures, ensuring you always have current data.
All calculations run in your browser. Your salary, assets, and personal data are never sent to any server.
32+ unit tests verify every engine against known correct outputs, including edge cases like WNT caps and zero-income scenarios.