UK Expat Tax Calculator 2026 -- Income Tax, NI and Treaty Rules Estimator
UK expat tax calculator 2025/26: 20% basic, 40% higher (above £50,270), 45% additional (above £125,140). Personal allowance £12,570. Non-residents pay tax only on UK-source income. Class 2 NI costs £3.45 per week. HMRC Self Assessment mandatory for non-residents with UK income.