Estimated tax owed
Fill in the fields and press “Calculate”.
2026 rates verified against belastingdienst.nl. Estimate only — not financial advice. For accurate filing, consult an accountant. Simplified model: linear approximation of arbeidskorting + 30% default ZZP deduction (no exact zelfstandigenaftrek/MKB-vrijstelling). 30%-ruling toggle available for employed/mixed scenarios — eligibility not verified. For accurate calculation — Mijn Belastingdienst Zakelijk. Data as of 2026-05-07 · Source: Verified 2026-05-07 against belastingdienst.nl + rijksoverheid.nl 2026 tarieven (Box 1 non-AOW brackets; algemene heffingskorting 2026 max EUR 3115; arbeidskorting 2026 max EUR 5685; KOR threshold EUR 20000 unchanged). NOTE: this calculator is a deliberately simplified linear-ramp estimator; personalAllowance is modeled as an income deduction rather than a tax credit; arbeidskorting is a single linear ramp rather than the real build-up/plateau/phase-out curve. Numbers below are official 2026 values; the model around them is an approximation by design (see /{locale}/taxes/calculator disclaimers).
