20 free UK financial calculators
Calculate it. Understand it.
Free UK financial calculators that load fast, work on any device, and explain the maths in plain English. No signup. Your figures stay in your browser.
UK petrol, pence per litre
174.07p
+39.67p on a year ago
- Diesel, UK average
- 199.22p
- Fuel duty, 1 Jul 2027
- 52.95p → 60.59p
- VAT registration
- £90,000
- ISA allowance
- £20,000
- 2026/27 UK rates
- Figures from GOV.UK and HMRC
- Your figures stay in your browser
- Works on any device
- No sign-up
Most popular
The calculators people search for most. Updated for the 2026/27 tax year.
VAT calculator
Add VAT, remove VAT, reverse VAT. Standard 20% and reduced 5% rates. Instant results.
High valueStamp duty calculator
SDLT for England and Northern Ireland. First-time buyer relief, additional property surcharge.
PropertyMortgage overpayment
See exactly how much interest and time you save with monthly overpayments.
All calculators
20 free UK financial calculators. Updated for 2026/27.
Property
Tax
- VAT
- VAT thresholdShould you register for VAT? Turnover projections and threshold tracking.
- Capital gains taxProperty and assets. Annual exempt amount, residential vs non-residential rates.
- Dividend taxDividend allowance and tax at basic, higher and additional rates.
- Sole trader taxIncome tax, Class 2 and Class 4 NI. Effective rate and take-home profit.
- Payment on accountSelf-assessment instalment payments, due dates and balancing payment.
Motoring
- Fuel cost calculatorCompare petrol, diesel and EV running costs per journey and per year.
- Fuel duty rise 2027What the July 2027 fuel duty rise adds to your petrol or diesel bill a year, a month and per tank.
- Mileage allowanceHMRC approved rates for cars, motorcycles and bicycles. Tax relief calculator.
Savings & work
- Compound interestSavings and investment growth with monthly contributions and compounding.
- Lifetime ISA withdrawal penaltyThe 25% charge, the 20% charge for first homes over £450,000, and what you get back.
- Pension calculatorProject your pension pot and estimate your retirement income.
- Inflation calculatorHow purchasing power has changed over time using historic UK CPI data.
- Salary sacrificeSee your tax and NI savings from pension salary sacrifice contributions.
- Student loan repaymentPlan 1, 2, 4, 5 and postgraduate. Monthly repayments and time to clear.
- Redundancy payStatutory redundancy based on age, service length and weekly pay cap.
- Holiday entitlementStatutory annual leave for full-time, part-time and irregular hours workers.
- Maternity & paternity paySMP, SPP and maternity allowance week by week. 2026/27 rates.
Explainer · Motoring
Where a litre of petrol goes.
Of 174.07p at the pump, 82p is tax. Duty is a fixed amount per litre, so it doesn't fall when oil does. It rises 9.17p a litre, with VAT, on 1 July 2027.
DESNZ weekly road fuel prices, w/c 26 Oct 2026. Budget 2026, Annex A.
UK salary and take-home pay calculators. Full PAYE, NI and student loan engine. Updated for 2026/27.
Guides
Plain-English explanations of how UK tax, property and employment rules work.
UK VAT rates 2026: complete guide
Standard, reduced and zero rates. What's exempt and what's not.
Stamp duty rates 2026: SDLT guide
All regions, all buyer types. What you pay and when.
Should you overpay your mortgage?
Overpay vs save vs invest. The real numbers for 2026.
UK redundancy pay rights explained
Statutory minimums, tax treatment, and what to expect.
Holiday entitlement rights 2026
Pro rata calculation, bank holidays, and common mistakes.
Capital gains tax guide 2026/27
Property, shares, crypto. What you owe and how to reduce it.
Fuel duty and petrol costs explained
How pump prices work, fuel duty rates, and EV savings.
Maternity and paternity pay guide
SMP, SPP and shared parental leave rates for 2026/27.
UK inflation history and impact
CPI vs RPI, purchasing power, and what it means for your money.
SOURCED
Every rate comes from GOV.UK, HMRC or DESNZ. How our figures work lists each source.
DATED
Pages show when their figures were last checked, and rates are set for the 2026/27 tax year.
TESTED
Automated tests check the figures on each page against the rates in its calculator before anything ships.