UK Calculators for Tax, Salary & Finance
Fast, accurate, mobile-friendly tools for UK employees, contractors and self-employed workers. Work out your income tax, take-home pay, PAYE, dividends and more — in seconds.
⭐ Popular UK Calculators
The most-used calculators on FastCalculator.co.uk, trusted by employees, contractors and self-employed workers across the UK.
UK Income Tax Calculator
Calculate income tax and National Insurance for the current UK tax year based on your earnings.
Use Calculator →Effective Tax Rate Calculator
Calculate your effective tax rate — the average rate you pay across all your income.
Use Calculator →Salary Calculator UK
Convert between annual, monthly, weekly and daily salary figures quickly.
Use Calculator →Take-Home Pay Calculator
See your net pay after income tax, National Insurance and pension contributions.
Use Calculator →Car Payment Calculator
Estimate monthly car loan payments and total interest based on loan amount, APR and term.
Use Calculator →Investment Calculator
Estimate the future value of your investment with regular contributions and compound interest.
Use Calculator →📋 UK Tax Calculators
Everything you need to understand your UK tax position — from annual income tax to deductions and tax bands.
Tax Calculator UK
General-purpose UK tax calculator for estimating your income tax liability.
Use Calculator →Income Tax Calculator UK
Calculate your income tax for the current UK tax year based on your earnings.
Use Calculator →Tax Bracket Calculator
Find which UK tax bracket your income falls into and how much tax you pay at each rate.
Use Calculator →Tax Rate Calculator UK
Quickly identify the basic, higher or additional rate that applies to your income.
Use Calculator →Tax Deduction Calculator
See all deductions from your gross pay — income tax, NI, pension and more.
Use Calculator →Tax Estimator UK
Get a quick estimate of your UK tax liability based on your income.
Use Calculator →Tax Return Calculator
Estimate your Self Assessment tax return liability before you file.
Use Calculator →Taxable Income Calculator
Work out your taxable income after the Personal Allowance and deductions.
Use Calculator →💵 Salary & Pay Calculators
Convert hourly, weekly, monthly and annual pay with these free UK salary tools.
Salary Calculator UK
Convert between annual, monthly, weekly and daily salary figures quickly.
Use Calculator →Annual Salary Calculator
Work out your annual salary from hourly, daily, weekly or monthly pay.
Use Calculator →Monthly Salary Calculator
Calculate your monthly take-home pay after tax and National Insurance.
Use Calculator →Hourly Pay Calculator
Calculate your hourly rate and net hourly pay after deductions.
Use Calculator →Hourly to Salary Calculator
Convert your hourly wage into annual, monthly, weekly and daily salary figures.
Use Calculator →Hourly Wage Calculator
Work out your hourly wage from your salary and hours worked.
Use Calculator →Wage Calculator
Calculate your total wages based on hourly rate and hours worked.
Use Calculator →Pay Calculator UK
General-purpose UK pay calculator for estimating your take-home pay.
Use Calculator →Paycheck Calculator UK
See what your paycheck looks like after tax and other deductions.
Use Calculator →Payroll Calculator UK
Estimate payroll costs including employer National Insurance.
Use Calculator →Payroll Deductions Calculator
See how much is deducted from gross pay for tax, NI and other contributions.
Use Calculator →Payroll Tax Calculator UK
Calculate payroll tax and contributions for UK employees.
Use Calculator →Net Pay Calculator UK
Calculate your net pay after all deductions have been applied.
Use Calculator →Holiday Pay Calculator
Calculate your holiday pay entitlement based on your earnings.
Use Calculator →Overtime Calculator UK
Calculate overtime pay based on your hourly rate and hours worked.
Use Calculator →Take-Home Pay Calculator
See your net pay after income tax, National Insurance and pension contributions.
Use Calculator →📈 Investment & Finance Calculators
Plan investments, savings and business finance with these free UK tools.
Investment Calculator UK
Estimate the future value of your investment with regular contributions and compound interest.
Use Calculator →Investment Growth Calculator
Project how your investment grows over time with compound returns.
Use Calculator →Investment Return Calculator
Calculate the return on your investment over a given period.
Use Calculator →IRR Calculator UK
Calculate the internal rate of return on your investment projects.
Use Calculator →IR35 Calculator UK
Check your IR35 status and estimate tax liabilities for off-payroll working.
Use Calculator →NPV Calculator UK
Calculate the net present value of an investment to evaluate its profitability.
Use Calculator →Net Present Value Calculator
Detailed NPV calculation with multiple cash flow periods.
Use Calculator →Future Value Calculator
Calculate the future value of an investment with compound growth.
Use Calculator →Rate of Return Calculator
Calculate the rate of return on your investments over time.
Use Calculator →Profit Margin Calculator
Calculate your profit margin, markup and gross profit for products or services.
Use Calculator →Discount Calculator UK
Work out the discounted price and savings from a percentage discount.
Use Calculator →Savings Account Calculator
Estimate interest earned on your savings account over time.
Use Calculator →Fixed Deposit Calculator
Calculate the return on a fixed deposit account over a set term.
Use Calculator →Bond Price Calculator
Calculate the price and yield of a bond based on coupon and maturity.
Use Calculator →CAGR Calculator UK
Calculate the compound annual growth rate of your investments.
Use Calculator →Retirement Calculator UK
Estimate how much you need to save for retirement based on your goals.
Use Calculator →Salary Sacrifice Calculator
Compare your take-home pay with and without salary sacrifice arrangements.
Use Calculator →Salary Sacrifice Car Calculator
Estimate the tax savings on a salary sacrifice car scheme.
Use Calculator →🧰 Other Useful Calculators
Everyday tools for mileage, car payments and health checks.
Car Payment Calculator
Estimate monthly car loan payments and total interest based on loan amount, APR and term.
Use Calculator →Mileage Calculator UK
Estimate fuel cost and mileage for business or personal travel.
Use Calculator →About FastCalculator.co.uk
FastCalculator.co.uk is an independent UK calculator site providing free, fast and mobile-friendly tools for tax, salary, PAYE, investments, savings and everyday finance. Our calculators are used by employees, contractors and self-employed workers who want a quick, clear estimate before speaking to an accountant or completing a Self Assessment.
Every calculator runs entirely in your browser — the income, salary or other figures you enter are never transmitted to or stored on our servers. Where tax rates are used, they are sourced from HMRC and clearly labelled with the tax year they apply to.
Important: All calculations are estimates for guidance only and do not constitute financial, tax or legal advice. FastCalculator.co.uk is independent and is not affiliated with HMRC or the UK Government. For personalised advice, please consult a qualified accountant. Read the full Disclaimer.
❓ Frequently Asked Questions
What calculators are available on FastCalculator.co.uk?
FastCalculator offers a wide range of free UK calculators covering income tax, salary, take-home pay, PAYE, investments, savings and everyday finance. Browse the full list on our Calculators page.
Are the calculators free to use?
Yes, all calculators on FastCalculator.co.uk are completely free to use, with no registration or hidden charges.
Are the tax calculations official?
No, our tax calculators provide estimates based on current UK tax rates published by HMRC. They are for guidance only and should not replace official HMRC calculations or professional advice.
Can I use these calculators on my phone?
Yes, all calculators are fully mobile-responsive and work on smartphones, tablets, laptops and desktops.
Do you store the figures I enter?
No. All calculations run entirely in your browser using JavaScript. The income or salary figures you enter are never transmitted to or stored on our servers.
Who writes the content on FastCalculator.co.uk?
Our UK tax and finance content is written and maintained by Abdul Wahid, a financial content writer specialising in UK tax and salary calculations.