Netherlands Tax Calculators

Dutch tax planning in 2026 runs on two frontiers, and both have calculators here. Box 3 is mid-transition: the deemed-return system (1.03% on savings, 6.00% on investments, 36% rate) applies now, the actual-return system is scheduled for 2028, and the side-by-side tool shows which one your portfolio would prefer. For freelancers, the ZZP calculator runs the full 2026 stack, the shrunken €1,200 Zelfstandigenaftrek, the €2,123 starters allowance, the 12.7% MKB exemption, the 35.75%/37.56%/49.5% brackets, both tax credits, and the separate ZVW health premium, down to a monthly take-home figure.