Updated for 2025/26 tax year

UK tax calculators that
actually make sense

Free, accurate calculators for self assessment, dividend tax, capital gains, IR35, salary sacrifice and more. Built on HMRC's official 2025/26 rates. No sign-up, no nonsense, just the numbers you need.

14 free calculators 2025/26 HMRC rates No account required Scottish rates included
Based on HMRC's published rates
All calculations run in your browser
No data stored or shared
Updated April 2025
14
Free calculators
4
Tax categories
£0
Cost to use
25/26
Tax year rates

Income Tax & Self Assessment

5 calculators

MVP
Self Assessment Tax Calculator
Employment, self-employment, rental, and savings income. Calculates total tax, payments on account, and balance owed.
Calculate
MVP
Dividend Tax Calculator
Enter your salary and dividend income. Shows tax at 8.75%, 33.75%, and 39.35% across each band, including the £500 allowance.
Calculate
MVP
Capital Gains Tax Calculator
Shares, property, and other assets. Calculates CGT at 18% and 24% after the £3,000 annual exempt amount.
Calculate
Marriage Allowance Calculator
Check eligibility and calculate the £252 annual saving from transferring 10% of the personal allowance to a spouse or civil partner.
Calculate
Tax Code Checker
Enter your tax code (e.g. 1257L) and find out exactly what it means, your tax-free allowance, and whether it looks correct.
Check my code

Business & Freelance

4 calculators

MVP
IR35 Status Checker
Guided questionnaire based on HMRC's CEST criteria. Assesses control, substitution, and mutuality of obligation to give an indicative inside/outside verdict.
Check IR35 status
Salary vs Dividends Calculator
For Ltd company directors: find the optimal salary and dividend split to minimise your total tax burden including income tax, NI, and corporation tax.
Optimise split
VAT Threshold Checker
Enter your monthly turnover and see when you will cross the £90,000 VAT registration threshold, and whether the Flat Rate Scheme could benefit you.
Check threshold
Employer Cost Calculator
The true cost of an employee: salary plus employer NI at 15%, auto-enrolment pension contribution, and apprenticeship levy where applicable.
Calculate true cost

Salary Sacrifice & Benefits

3 calculators

MVP
Salary Sacrifice Calculator
Pension sacrifice, cycle to work, EV salary sacrifice, and childcare. Shows the take-home pay impact and employer NI saving passed back to you.
Calculate saving
Student Loan Repayment Calculator
All plans: 1, 2, 4, 5, and postgraduate. Shows monthly repayment, annual total, estimated years to clear, and total repaid with interest.
Calculate repayments
Pension Contribution Calculator
Enter your salary, contribution percentage, and employer match. See the tax relief amount, your effective cost, and a projected retirement pot.
Project my pension

Property & Capital

2 calculators

Inheritance Tax Calculator
Estate value, property, and beneficiaries. Calculates IHT at 40% after the £325,000 nil-rate band, £175,000 residence band, and spouse exemptions.
Calculate IHT
Rental Income Tax Calculator
Rental income, allowable expenses, and mortgage interest under the Section 24 rules: the 20% finance cost tax credit that catches many landlords out.
Calculate tax
About Tax Toolkit UK

Built for people who just want a straight answer

Most free tax calculators are either too simple to be useful or buried under paywalls and registration walls. Tax Toolkit UK is different: every calculator is free, immediate, and built on HMRC's actual published rates for 2025/26.

All calculations happen locally in your browser. No data leaves your device, no account is required, and no figure you enter is stored or shared. The results are guidance, so always verify anything financially significant with a qualified accountant or tax adviser.

Tax Toolkit UK provides free calculators for guidance purposes only. Results are estimates based on HMRC rates for the 2025/26 tax year. Tax legislation is complex and individual circumstances vary considerably. Always consult a qualified tax adviser or accountant before making financial decisions based on these figures. This site does not provide professional tax advice.