TaxSmith - UK Tax Calculator

TaxSmith is a free, simple UK tax calculator built for self-employed sole traders, freelancers and tradespeople. Enter your annual income and business expenses, and TaxSmith instantly calculates: - Income Tax (basic, higher and additional rates) - Class 2 National Insurance - Class 4 National Insurance - Total tax bill - Take-home pay (yearly, monthly and weekly) - Your effective tax rate Supports both the 2025/26 and 2026/27 UK tax years with up-to-date HMRC rates and thresholds including the personal allowance, basic rate band and NI limits. KEY FEATURES - Instant calculations with no internet required - Works completely offline - Supports 2025/26 and 2026/27 tax years - Personal allowance tapering for high earners (over 100k) - Class 2 and Class 4 NI calculated automatically - Clean, dark-themed professional interface - No ads, no tracking, no subscription PERFECT FOR - Sole traders calculating quarterly payments - Freelancers estimating take-home pay - Tradespeople (builders, plumbers, electricians) - Self-employed workers preparing for Self Assessment - Anyone considering going self-employed TaxSmith provides estimates based on current UK tax rates for self-employed individuals. It does not constitute financial advice. Consult a qualified accountant for your specific situation.