Free UK Estimator
UK Self Assessment Tax Calculator
Estimate your UK self-employed tax — income tax bands plus Class 4 National Insurance — for your Self Assessment.
Estimates use latest published figures (US 2025 brackets & 15.3% SE tax, UK Self Assessment bands + Class 4 NI, Canada federal + CPP, Germany §32a 2026 income tax + est. social & 19% VAT, GCC VAT rates). Simplified estimate for planning only — not tax advice.
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