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Free financial calculators

Run the numbers on your salary, pension, mortgage and more — using the same engine that powers FinMapper. One free result each; sign up to go deeper.

Retirement

Quick Retirement Projection

Five numbers in, your projected pension pot and retirement income out — with a year-by-year graph.

Salary & Tax

UK Salary & Tax Calculator

See exactly what lands in your account after Income Tax, National Insurance, pension and student loan — 2025/26 rates.

Bonus: Cash vs Pension Sacrifice

Take your bonus as cash today or sacrifice it into your pension? See the real difference over time.

Promotion Pay-Rise Comparison

Model the true take-home impact of a raise after tax, NI, pension and student loan.

Property & Money

Mortgage Overpay vs Invest

Should you overpay the mortgage or invest the surplus? The real numbers, side by side.

Electric vs Petrol: True Cost

Compare the full cost of ownership — purchase, fuel, tax, insurance, servicing and depreciation.

Life events

Divorce Settlement Estimator

An illustrative split of property, assets, pensions and maintenance. Not legal advice.

Inheritance Tax Estimator

Estimate the IHT due on an estate using the nil-rate and residence nil-rate bands.

Important Notice

FinMapper provides illustrative financial modelling tools for informational purposes only. Nothing on this platform constitutes financial advice, investment advice, legal advice, or a personal recommendation of any kind. All projections are based on the assumptions you provide and may differ materially from actual outcomes. Past performance is not a reliable indicator of future results. Divorce settlement estimates are not legal advice — always consult a qualified family law solicitor. You should seek independent financial advice from an FCA-authorised adviser before making any financial decisions. FinMapper accepts no liability for decisions made in reliance on this platform.