Free UK Business Tax
Calculators 2025/26
Our free UK business tax calculators cover corporation tax, IR35 take-home pay, self-employed tax, dividend tax and more. All UK business tax calculators use current HMRC 2025/26 rates. Free, accurate, no sign-up required.
UK Business Tax — Instant Corporation Tax Estimate
⚠ Estimate only. Full calculator with marginal relief →
All Free UK Business Tax Calculators
Every UK business tax calculator you need as a contractor, freelancer, limited company director or self-employed professional — all updated for HMRC 2025/26.
Corporation Tax Calculator
Calculate your UK corporation tax bill for 2025/26 — including automatic marginal relief for profits between £50,000 and £250,000.
IR35 Calculator
Compare your inside IR35 vs outside IR35 take-home pay side by side. See exactly how much IR35 costs you as a UK contractor in 2025/26.
Marginal Relief Calculator
Calculate corporation tax marginal relief for profits between £50,000 and £250,000. Includes associated companies adjustment.
Self-Employed Tax Calculator
Calculate your self-employed tax bill including income tax, Class 2 and Class 4 National Insurance. Updated for 2025/26 rates.
Dividend Tax Calculator
Calculate UK dividend tax for 2025/26 including the optimal salary and dividend split for limited company directors.
Umbrella Company Calculator
Calculate your umbrella company take-home pay after all deductions including the new 2025/26 employer NI rate of 15%.
Limited Company Tax Calculator
See the total tax paid through a limited company — corporation tax, dividend tax, and director salary — in one complete view.
Sole Trader vs Limited Company
Enter your income once and see exactly how much tax you pay as a sole trader vs limited company — with your exact crossover point.
Outside IR35 Calculator
Calculate your take-home pay as an outside IR35 contractor through a limited company, including salary and dividend breakdown.
UK Business Tax Rates for 2025/26
All our UK business tax calculators are updated for these confirmed 2025/26 HMRC rates. Verified against HMRC’s official published rates.
Accurate UK Business Tax Calculators, Updated Every April
Our UK business tax calculators use current HMRC 2025/26 rates. All calculations run in your browser — your numbers are never stored or shared. No sign-up, no email, no cost.
All calculations happen in your browser. Nothing is sent to a server. Your figures are yours alone.
Employer NI is now 15% above £5,000. All 2025/26 rates applied and verified against HMRC published figures.
Client-side calculations mean results appear the moment you click calculate — no loading, no waiting.
All rates cross-referenced with HMRC’s official published figures and confirmed against independent sources.
Select the right UK business tax calculator from our full list of free tools above.
Input your profit, income, or day rate. All fields have helpful hints and example values to guide you.
See your tax bill, effective rate, and take-home pay broken down clearly — in under a second.
Each calculator includes a written guide explaining how the rates work and what affects your bill.
About Our UK Business Tax Calculators
TaxPro UK provides free UK business tax calculators for contractors, freelancers, sole traders, and limited company directors. Our UK business tax calculators are updated every April when HMRC publishes new rates for the tax year — so you always get accurate, current results.
Whether you need a corporation tax calculator, an IR35 calculator, or a self-employed tax calculator, our free UK business tax calculators give you instant, itemised results based on current HMRC 2025/26 rates. All our UK business tax calculators run entirely in your browser — your figures are never stored or shared.
Our UK business tax calculators cover ten tools including corporation tax with marginal relief, IR35 inside vs outside comparison, dividend tax with salary optimiser, self-employed tax with Class 2 and Class 4 NI, limited company total tax view, umbrella company take-home, and a sole trader vs limited company comparison tool.
All rates in our UK business tax calculators are sourced directly from HMRC’s official tax rates and allowances and updated as soon as new rates are confirmed each tax year.
Free UK business tax calculators for contractors, freelancers and limited company directors. Updated for HMRC 2025/26.
UK Business Tax Calculators — FAQ
Answers to the most common questions about using our UK business tax calculators, updated for 2025/26.
Ready to calculate your actual tax bill?
All our free UK business tax calculators are instant, accurate, and updated for HMRC 2025/26 rates. No sign-up. No email address. Just accurate results.