Calculators
Free UK tax & accountant calculators
Quick, no-signup estimates using 2026/27 UK rates — then compare accountants to get the real number for your business.
Tax
Sole trader tax & NI
Estimate Income Tax and Class 4 National Insurance on your self-employment profit.
Salary vs dividends
Compare take-home pay for a limited company director across salary and dividend splits.
Corporation tax
Estimate your limited company's Corporation Tax bill, including marginal relief.
Contractor take-home
Compare take-home pay outside IR35 (your own limited company) against inside IR35 (umbrella).
Payroll
VAT
Compliance