Free UK Personal Finance Tools

Plain-English calculators and helpers for UK money decisions. No sign-up, no email, no upsell, just the maths, in seconds.

📚 All tools use figures from official UK government sources: HMRC, gov.uk, the Bank of England, and the FCA. They are not financial advice.

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Lifetime ISA Calculator

Project your 25% government bonus and total balance. Year-by-year breakdown.

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Capital Gains Tax Calculator

Calculate CGT on shares, property, and crypto using 2025/26 rates and the £3,000 allowance.

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Take-Home Pay Calculator

Income tax + National Insurance breakdown for any UK salary, including pension contributions.

Coming soon

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Stamp Duty Calculator

SDLT on UK property purchases, including first-time buyer relief and the April 2025 changes.

Coming soon

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Mortgage Repayment Calculator

Monthly payments and total interest for fixed and variable UK mortgages.

New tools, the morning they launch

Subscribe to FinanceSimply and we’ll let you know the moment a new calculator goes live. Free, before 8am, in plain English.

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Disclaimer: These tools are for informational purposes only and do not constitute financial advice. FinanceSimply is not regulated by the FCA. All figures, rates, and rules are based on official government publications and are subject to change, always verify with HMRC, gov.uk, or a qualified adviser before making financial decisions.