All calculators

172 free UK tax calculators across 9 categories. Every one shows the tax year it used and the rules it applied.

Showing 73–96 of 172

Loan CalculatorThis loan calculator shows you the monthly repayment, the total you will pay back and how much of that is interest on any amount you borrow. Enter the loan amount, the APR your lender quotes and the term in months or years, and you get an instant breakdown for a personal loan, car finance, a debt consolidation loan or any other fixed borrowing. It works as a general finance calculator for everyday borrowing decisions, so you can compare deals before you sign and see exactly what a longer or shorter term does to the cost. The figures are estimates to help you plan, not a credit offer.
Loan Repayment CalculatorThis loan repayment calculator turns three numbers you already know - how much you want to borrow, the interest rate and how long you'll take to pay it back - into the figure that actually matters: your monthly repayment. It then shows the total interest and the full cost over the life of the loan, so you can see what a deal really costs before you sign anything. It works for personal loans, car finance and most fixed-rate borrowing across England, Scotland, Wales and Northern Ireland. No sign-up, no jargon.
Loan to Value CalculatorUse our free Loan to Value Calculator to get an instant estimate.
MTD Income Tax Scope CheckerThis Making Tax Digital scope checker tells you, in seconds, whether MTD for Income Tax applies to you and from which tax year, based on your self-employment and property income. Rather than wading through HMRC guidance, simply enter your figures and let the tool do the work. Making Tax Digital for Income Tax is being phased in from April 2026, 2027 and 2028 depending on your total qualifying income, so knowing exactly when you are caught helps you prepare for digital record-keeping and quarterly updates well ahead of your start date.
MTD Quarterly Record OrganiserThis MTD quarterly record organiser is a free, no-signup tool to keep digital records for Making Tax Digital. Log your income and expenses as they happen and the organiser groups everything into the four quarterly periods you need to report to HMRC. Get your four quarterly summaries automatically, see a running year total, and export to CSV whenever you need it. Your data saves in your browser, so you can keep your books tidy throughout the year and stay ready for each submission deadline.
MTD for Income Tax Checker & Deadline TrackerUse the checker above to see whether Making Tax Digital for Income Tax applies to you and when, based on your self-employment and property income.
Mansion Tax Calculator (High-Value Surcharge)From April 2028 , homes worth £2 million or more face an annual high-value council tax surcharge - the so-called mansion tax - of between £2,500 and £7,500 depending on value. Check your band and the yearly cost.
Markup CalculatorThis markup calculator turns a cost price and a markup percentage into a selling price, the cash profit you keep and the profit margin behind it. Type in what an item costs you and the markup you want to add, and it does the arithmetic so you can price with confidence. It is built for UK sole traders, shop owners, makers, tradespeople and anyone quoting jobs who needs a quick, reliable price without second-guessing the maths or confusing markup with margin.
Marriage Allowance CalculatorThis marriage allowance calculator checks whether you and your husband, wife or civil partner can transfer part of one person's tax-free allowance to the other in the 2026/27 tax year, and shows the cash saving. It's built for couples where one of you earns under the Personal Allowance and the other is a basic-rate taxpayer. Marriage Allowance is one of the most overlooked tax breaks in the UK. If you qualify, the maths is simple and the claim is free - yet hundreds of thousands of eligible couples never make it.
Maternity Leave CalculatorUse our free Maternity Leave Calculator to get an instant estimate.
Maternity Pay CalculatorThis maternity pay calculator helps you estimate your Statutory Maternity Pay (SMP) across the full 39 weeks of leave, so you can plan the months ahead with real numbers rather than guesswork. Tell it your average weekly earnings and it works out the higher first-six-weeks rate and the flat-rate phase that follows. It is built for employees in England, Wales, Scotland and Northern Ireland for the 2026/27 tax year. If money is the thing keeping you up at night before a new arrival, this gives you a clear picture of what should land in your account each month.
Mileage Allowance CalculatorThis mileage calculator works out your tax-free mileage allowance using HMRC's Approved Mileage Allowance Payments (AMAP) rates for the 2026/27 tax year. Enter your business miles and the vehicle you use, and it shows what you can be paid tax-free, and how much relief you can claim if your employer pays you less than the approved rate. It's built for employees who use their own car, van, motorbike or bike for work, and for sole traders using simplified mileage. It does not cover your ordinary commute, which never qualifies.
Mileage Tracker & ClaimThis mileage tracker turns your business journeys into a tax-free claim using HMRC's Approved Mileage Allowance Payment (AMAP) rates of 45p and 25p a mile. Log your miles, pick your vehicle, and see exactly what you can deduct from your profits or reclaim from your employer. It's built for sole traders, freelancers, contractors, landlords and employees who drive their own car, van, motorbike or bike for work. Whether you're filing a Self Assessment return or claiming mileage allowance relief through PAYE, the maths is the same - and most people undercount.
Mortgage Affordability CalculatorThis mortgage affordability calculator gives you a realistic estimate of how much you could borrow based on your household income, your deposit and your regular monthly outgoings. It mirrors the way UK lenders actually weigh up an application, so you can see your likely ceiling before you ever speak to a broker or fill in a form. It is built for first-time buyers, home movers and anyone remortgaging onto a bigger property who wants a quick, honest answer to a simple question: how much mortgage can I get?
Mortgage CalculatorThis mortgage calculator works out your monthly repayments and the total cost of your home loan from four figures: the property price, your deposit, the interest rate and the term. It is built for UK buyers and homeowners - first-time buyers comparing deals, movers checking a new mortgage, and anyone remortgaging onto a fresh rate. Enter your numbers and you will see the monthly payment, the total interest you will pay over the life of the loan, and how the balance falls year by year. No sign-up, no personal details - just the maths.
Mortgage Overpayment CalculatorThis mortgage overpayment calculator shows how much interest you could save, and how many years you could knock off your term, by paying extra towards your home loan. Whether you can spare £50 a month or drop a £5,000 windfall onto the balance, you will see the effect in pounds and in time saved. It is built for UK homeowners weighing up whether to overpay the mortgage, top up savings, or clear other debt first. Enter your balance, rate, remaining term and the overpayment you have in mind, then read on for the maths behind the numbers and the traps to avoid.
Mortgage Repayment CalculatorUse the mortgage repayment calculator above to estimate your monthly payments from the loan amount, interest rate and term, and see how changing any of them affects what you pay.
National Insurance CalculatorThis national insurance calculator shows how much Class 1 National Insurance you pay as an employee in the 2026/27 tax year, broken down by year, month or week. Enter your salary and you'll see the slice that goes to NI before your pay lands in your account. It's built for employees on PAYE who want a quick, honest figure rather than a vague estimate. NI is charged UK-wide at the same rates, so whether you're in Cardiff, Belfast, Glasgow or Manchester, the numbers here apply to you.
Net Salary CalculatorThis net salary calculator turns your gross salary into the figure that actually lands in your bank account after Income Tax, National Insurance and pension contributions for the 2026/27 tax year. It is built for employees across England, Wales, Scotland and Northern Ireland who want a clear, honest breakdown rather than a vague estimate. Enter your annual salary above, add a pension percentage if you have one, and you will see your net pay yearly, monthly and weekly - with every deduction shown line by line.
Notice Period CalculatorUse our free Notice Period Calculator to get an instant estimate.
Overtime CalculatorUse our free Overtime Calculator to get an instant estimate.
P11D GeneratorOur free P11D generator creates a clear PDF listing an employee's taxable benefits in kind and the total cash equivalent, plus the employer Class 1A NIC. Enter company car, fuel, medical insurance, loans and other expenses and benefits to build the figures you need for reporting. Everything runs in your browser with no signup, so you can quickly produce a P11D for each employee and keep an accurate record of the benefits provided during the tax year.
P45 GeneratorOur free P45 generator lets you create a P45 PDF recording an employee's pay and tax when they leave. No signup, unlimited. A P45 summarises an employee's pay to date, tax to date, tax code and leaving details for the part of the tax year they worked. Enter the figures once and produce a clean, printable PDF you can keep for your records or hand to a departing employee.
Pay Rise CalculatorThis pay rise calculator shows how much of your raise you actually keep once Income Tax and National Insurance take their share in the 2026/27 tax year. Enter your current salary and your new salary to see the real increase in your monthly take-home pay, not just the headline figure your employer quotes. Because a raise can push part of your income into a higher tax band, it also shows what happens if your rise tips you over £50,270 or the £100,000 personal allowance taper, so you can see how much of each extra pound you keep.

Every calculator, by category

Property & Tax

Self-Employed & Business

Property & Mortgage

Pensions & Retirement

Savings & Investments

Loans, Debt & Credit

Everyday Money

Software that files it for you

Partner links

If you keep your own books, these are the packages that handle Self Assessment and Making Tax Digital.

FreeAgent

4.8

Free optionMTD ready

The freelancer and contractor favourite, free with some bank accounts.

Free forever with a NatWest, Royal Bank of Scotland, Ulster or Mettle business account
Built-in Self Assessment and MTD for Income Tax filing

From £0 with a NatWest, RBS or Mettle account, otherwise about £19/mo

See FreeAgent

QuickBooks

4.6

MTD ready

The big all-rounder with the deepest MTD track record.

Sole Trader plan built specifically for Self Assessment and MTD
Snap and store receipts, automatic bank feeds

From about £10/mo, frequent 90% off intro offers

See QuickBooks

Xero

4.5

MTD ready

The scale-up choice once you have staff, stock or VAT.

Huge app marketplace and the accountant industry standard
Strong for VAT, payroll and multi-user limited companies

From about £15/mo

See Xero

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