UK Tax & Payroll Calculators
Free calculators for the 2026/27 tax year, built and checked by chartered accountants against HMRC and gov.uk sources.
Personal tax
Capital Gains Tax Calculator
CGT on property, shares or business assets at the 2026/27 rates of 18% and 24%.
Open calculator →Income Tax Calculator
Take-home pay after income tax, NI, student loan and pension, including Scottish rates and salary sacrifice.
Open calculator →Self Assessment Tax Calculator
Your 2026/27 tax return bill, balancing payment and payments on account in one estimate.
Open calculator →Self-Employed Tax Calculator
Income tax and Class 4 NI on sole trader profits, with what to set aside and payments on account.
Open calculator →Student Loan Calculator
Repayments on Plans 1, 2, 4, 5 and Postgraduate Loans, with combined plans and a write-off estimate.
Open calculator →Employment & payroll
Holiday Entitlement Calculator
Statutory 5.6 weeks' leave in days or hours, pro rata for starters and leavers, and 12.07% accrual for irregular hours.
Open calculator →Maternity Pay Calculator
SMP for 39 weeks at 2026/27 rates, the £129 earnings test and the 92% or 109% employer reclaim.
Open calculator →National Insurance Calculator
Employee and employer Class 1 NI per pay period, plus Class 2 and Class 4 for the self-employed.
Open calculator →Redundancy Pay Calculator
Statutory redundancy pay by age and service, with the £751 weekly cap (£783 in NI) from April 2026.
Open calculator →Statutory Sick Pay Calculator
SSP from day one under the April 2026 rules: £123.25 a week or 80% of earnings, whichever is lower.
Open calculator →Business tax
Business Rates Calculator
2026/27 bill in England with the new RHL and high-value multipliers and small business rate relief.
Open calculator →Effective Interest Rate Calculator
EIR after fees and costs, with an FRS 102 amortised cost table.
Open calculator →Patent Box Calculator
Relevant IP profits, the Patent Box deduction and the tax saved at the 10% IP rate.
Open calculator →Plastic Packaging Tax Calculator
PPT at £228.82 a tonne, the 30% recycled plastic test and the 10-tonne registration threshold.
Open calculator →R&D Tax Credit Calculator
Merged 20% RDEC after tax, or ERIS for loss-making R&D intensive SMEs.
Open calculator →VAT Flat Rate Scheme Calculator
Flat rate vs standard VAT with all HMRC sector rates, the 16.5% limited cost test and first-year discount.
Open calculator →Pensions & estates
Inheritance Tax Calculator
IHT on an estate with the £325,000 and £175,000 allowances, charity rate, lifetime gifts and taper relief.
Open calculator →Pension Annual Allowance Calculator
Pension savings against the £60,000 allowance, with taper, MPAA, carry forward and the tax charge.
Open calculator →These calculators give estimates based on the rates and thresholds in force for the 2026/27 tax year. They are not a substitute for advice on your circumstances. If a decision depends on the figure, speak to one of our accountants.
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