Tax calculators for UK businesses
Free UK tax calculators, games, and interactive tools updated for the 2026/27 tax year. All use current HMRC rates and thresholds. No signup required.
Salary & dividend calculator
Find the most tax-efficient way to pay yourself from your limited company. Adjust your salary with a slider and see how it affects your take-home pay, corporation tax, dividend tax and NIC.
Sole trader vs limited company
Compare your take-home pay under each structure side by side. See where the tax crossover point is for your income level and what each structure costs you in total tax.
Corporation tax calculator
Enter your company profit to see your corporation tax bill, marginal relief amount, and effective tax rate. Visual band indicator shows where your profit falls.
VAT registration calculator
Should you register for VAT voluntarily? Enter your numbers and compare your position under standard, flat rate, and cash accounting schemes.
True employee cost calculator
A £30,000 salary does not cost £30,000. See the true cost including employer NIC at 15%, pension auto-enrolment, and other statutory costs.
Pension tax relief calculator
See how much tax relief you get on pension contributions at your income level. Shows the net cost of each £1,000 contributed after relief.
Capital gains tax calculator
Calculate CGT on property or other assets. Enter purchase price, sale price and your income to see the tax at the correct rate for your band.
Tax code checker
Enter your HMRC tax code and get a plain English explanation of what it means, what your tax-free allowance is, and whether it looks correct.
Expense eligibility checker
Swipe right if it is allowable, left if it is not. 20 expense cards test your knowledge of HMRC rules — with instant explanations for every answer.
The late filing domino effect
Choose Self Assessment, Corporation Tax, or VAT and watch penalties cascade as the days tick past the deadline.
Mileage claim calculator
Log your business journeys and see your total HMRC mileage claim at 45p/25p rates. Shows the real tax saving for limited companies and sole traders.
Side hustle tax checker
Answer a few questions about your side income and find out whether HMRC needs to know. Covers eBay/Etsy sellers, freelancers, landlords, and gig workers.
Dividend vs pension — which saves more?
Compare the tax cost of taking dividends versus making pension contributions. Step-by-step breakdown shows why dividends are taxed twice and pension skips both.
What do April 2026 changes cost your business?
Enter your business details and see the total annual cost of every April 2026 change stacked together — dividend tax, NLW, doubled penalties, MTD, and frozen thresholds.
The claimable home office
Tap each item in a home office to discover what is claimable and what is not. Shows estimated annual value and the HMRC rule for every item.
The 2026/27 tax edition
Every tax change from April 2026 in one interactive page. Click any headline for the full explanation. Filter by directors, employers, self-employed, or everyone.
CIS payment flow
Enter a CIS invoice and watch your money split between you and HMRC. See deductions at 20%, 30%, or gross rates and understand how to claim the tax credit back.
Dividend tax change calculatorNew
See exactly how the April 2026 dividend tax increase affects you. Enter your dividends and compare your tax bill under the old 2025/26 rates vs the new 2026/27 rates side by side.
Tax-free income stackerNew
Stack every UK tax-free allowance for 2026/27: Personal Allowance, ISA, pension, dividends, savings, CGT and more. See how much you could shelter from tax.
Employer NIC cost calculatorNew
Enter salaries and NIC categories to see the true cost of employing staff in 2026/27. Includes 15% employer NIC, pension auto-enrolment, and NIC category guide.
Pension contribution optimiserNew
Enter your income and see how much a pension contribution would save in tax. Essential for anyone in the 60% taper trap between £100,000 and £125,140.
Landlord mortgage interest restrictionNew
See how the Section 24 mortgage interest restriction affects your rental income tax. Compares old rules vs the current 20% tax credit for higher rate taxpayers.
Scottish vs rest of UK taxNew
Enter your income and see the tax difference between Scotland and England/Wales/NI side by side. 7 Scottish bands vs 4 UK bands compared at any income level.
Should I incorporate? The numbersNew
Enter your profit and see sole trader vs limited company tax side by side. Automatically picks the most tax-efficient salary. Shows exactly where incorporation saves money.
Profit extraction plannerNew
Drag the salary slider and watch Corporation Tax, NIC, and dividend tax change in real time. Find the optimal salary and dividend split for your limited company.
IR35 calculatorNew
Enter your day rate and see take-home pay outside IR35, inside IR35, and as a permanent employee. Shows why inside IR35 pay is lower than permanent and the true annual cost.
Tax is complex. Getting it right does not have to be.
These tools give you estimates based on current HMRC rules. A qualified accountant can confirm the numbers, find savings a calculator cannot show, and make sure you are not leaving money on the table. Book a free 15-minute discovery call.
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