A&Y Financials — UK Tax Calculator

Instant UK Self-Employment tax & VAT calculations from your browser. Free tools by A&Y Financials.

Free UK Self-Employment Tax & VAT Calculator from A&Y Financials. ✓ Self-Employment Tax — Calculate Income Tax & Class 4 NI using 2025/26 rates ✓ VAT Calculator — Add or remove VAT (20%, 5%, 0%) instantly ✓ No signup, no tracking, no ads ✓ ~14KB — fast and lightweight ✓ Works offline Built by A&Y Financial Services — UK chartered accountants serving 500+ clients. For full breakdowns (pension, student loans, dividends), the extension links to our free web calculators at ayfinancials.com. Disclaimer: Estimates only. Not tax advice. 2025/26 rates for England, Wales & NI.