Free UK tax calculators for business owners
We built these to answer the questions UK business owners actually ask us: what is my real take-home pay, how much salary versus dividend, what does an extra hire cost, and how much CGT will I pay on the exit. All numbers reflect 2026/27 rates and thresholds. No email gate, no sign-up.
Salary & Dividend Optimiser
Find the most tax-efficient mix of salary and dividends for a UK limited company director. 2026/27 rates.
Take-Home Pay Calculator
Gross salary in, annual, monthly and weekly net out. 2026/27 income tax, NI, student loan and pension salary sacrifice.
Dividend Tax Calculator 2026/27
Work out your dividend tax bill at the new 2026/27 rates (10.75%, 35.75%, 39.35%) and see exactly how much more you pay than under the 2025/26 rates.
Pension Contribution Optimiser
Employer pension contributions reduce corporation tax. See the real cost to your company and whether pension beats taking the same money as dividend.
Mileage Reimbursement Calculator
Work out your 2026/27 mileage claim at the new 55p AMAP rate, including Mileage Allowance Relief if your employer pays less and the taxable excess if they pay more.
Employer NI & Cost-to-Hire
Full annual employment cost across your payroll with employer NI at 15%, Employment Allowance offset, and 3% auto-enrolment pension.
Associated Companies CT Calculator
See how associated companies divide the £50,000 and £250,000 corporation tax thresholds, what marginal relief you get, your effective CT rate, and whether quarterly instalments apply.
R&D Tax Credit Estimator
Indicative R&D credit under the 2024 merged scheme. Drop in qualifying spend to see your estimate and whether the intensive SME rate applies.
Van & Equipment Capital Allowance Calculator
See the year-one and four-year tax saving on a van, car, or equipment purchase under the FA 2026 rules: AIA, the new 40% first-year allowance, and writing down allowances at 14% or 6%.
VAT Scheme Comparator
Standard vs Flat Rate — run your turnover and input VAT to find out which scheme saves you money and whether the Limited Cost Trader rule forces you to 16.5%.
VAT Registration Threshold Checker
Run your turnover through the rolling 12-month and 30-day tests against the £90,000 threshold. See if you must register, the month you breach, and your exact register-by date.
BADR CGT Calculator
See your post-relief CGT on a business sale, your remaining lifetime allowance, and how the 2026/27 BADR rate of 18% (up from 14% in 2025/26) affects your CGT bill.
Residential CGT 60-Day Reporting Calculator
Work out the capital gains tax due on a UK residential property sale, your exact 60-day reporting deadline from completion, and whether you need to file a return at all.
Sole Trader vs Limited Company Calculator
Compare sole trader and limited company take-home on the same profit, and see where (if anywhere) incorporating actually wins. 2026/27 rates.
CIS Subcontractor Deduction Calculator
See what a contractor will deduct from your CIS invoices at 20% or 30%, your monthly take-home after deductions, and a year-end estimate of the refund you are likely due.
P11D & Benefit in Kind Calculator
Work out the taxable value of company cars, fuel, vans, beneficial loans and private medical cover for 2026/27, plus the employee tax and employer Class 1A NIC due.
MTD ITSA Readiness Checker
Enter your self-employment and property income to find your Making Tax Digital start date, what you must file each quarter, and whether an exemption applies.
Business Loan Calculator
Estimate the monthly repayment, total interest, and total cost of a limited-company business loan, amortising or interest-only.
Asset Finance Calculator
Estimate the monthly rental on hire purchase or a finance lease for company equipment, vehicles or machinery, including a balloon or residual payment.
EOT Tax Saving Calculator
See the CGT on a sale to an Employee Ownership Trust under the current 50% relief rule (from 26 November 2025), contrasted with the old 100% relief position and a straight trade sale using BADR.
Business Valuation Calculator
Get an indicative enterprise and equity value range for your company from its adjusted EBITDA and a sector multiple, before surplus cash and debt.