Free UK financial calculators · 2026/27

Every sum that matters,
calculated properly.

Reliable, clear, and free calculators for everything from mortgages to pensions — built for the UK, updated for the 2026/27 tax year, and independent of any bank or broker.

Stamp Duty Calculator

Calculate exactly how much SDLT you'll pay on your property purchase, including first-time buyer relief and the additional property surcharge.

Open calculator →

Take-Home Salary Calculator

Your actual take-home pay after income tax, National Insurance, student loans and pension contributions. Updated for the 2026/27 tax year.

Open calculator →

UK Pension Calculator

Estimate how much your pension pot could be worth at retirement — contributions, employer matching, and investment growth over time.

Open calculator →

Mortgage Repayment Calculator

Monthly repayments, total interest costs, and how overpayments could save you thousands. Instant amortisation schedule included.

Open calculator →

Compound Interest Calculator

See how your savings and investments grow over time, with the cumulative benefit of compound interest.

Open calculator →

Buy-to-Let Yield Calculator

Rental yield, cash-on-cash return, and annual profit or loss. See the full picture before you invest in property.

Open calculator →

UK VAT Calculator

Add or remove VAT instantly. Works with standard, reduced, and custom rates — exact breakdown of net, VAT, and gross.

Open calculator →

Why EverySum?

Most UK financial calculators live inside bank and estate-agent websites, where the calculator is a marketing funnel rather than a tool. EverySum is different: every calculator here is fast, free, works properly on your phone, and shows its working — banded tax tables, year-by-year schedules, and the formulas behind the numbers.

Every figure is kept current for the 2026/27 tax year, from stamp duty bands and first-time buyer relief to National Insurance rates and student loan thresholds. No sign-ups, no lead forms, no nonsense — just the numbers you came for.