Free UK tax calculators for 2026/27
Independent, no sign-up, updated for the 2026/27 tax year (checked ). Built for people who work for themselves and want a straight answer.
Sole trader tax calculator
Income tax + Class 4 National Insurance on your profit, take-home, payments on account.
Dividend tax calculator
Tax on dividends on top of your salary at the new 2026/27 rates (10.75% / 35.75% / 39.35%), £500 allowance, take-home.
IR35 calculator
Inside IR35 (umbrella/PAYE) vs outside IR35 (limited company) from your day rate — yearly take-home side by side.
CIS tax calculator
What the contractor deducts from your invoice (20% / 30%), and whether you're due a refund at year end.
Umbrella company calculator
From assignment rate to take-home: umbrella margin, employer NI, apprenticeship levy, pension, PAYE.
Get the 2026/27 self-employed tax calendar (free PDF)
Every HMRC deadline, MTD quarterly dates, payments on account — one page.