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Tax Calculators

Estimate capital gains tax, self-employment obligations, and government retirement benefits — for US, UK, Australia, and Canada.

Capital Gains Tax Calculator

Estimate tax on profits from shares, property, or crypto using country-specific rates and exemptions.

US / UK / AU / CA

Self-Employment Tax Calculator

Calculate income tax, National Insurance, CPP, or SE tax for freelancers and sole traders with quarterly payment estimates.

Freelancer / sole trader

Social Security & State Pension Estimator

Estimate government retirement benefits based on earnings history, NI years, or CPP contributions — and see the impact of claiming age.

Retirement planning

Choosing the right tax estimator

What these tools help you decide

These estimators give a plain-English figure for three common situations: tax on an investment gain, tax owed as a freelancer or sole trader, and the value of a government pension. They are designed for planning, not for filing.

How to choose

Use the capital gains calculator when you have sold or plan to sell shares, property or crypto; the self-employment calculator when you work for yourself and need to set money aside; and the Social Security / State Pension estimator to sanity-check expected retirement income. Each page shows the exact rules and tax year it uses.

Important limitations

Tax rules differ sharply by country and change every year. Our calculators model federal or national rules for the US, UK, Australia and Canada and deliberately omit US state, Scottish and Canadian provincial taxes, most reliefs, and personal circumstances. For anything with real money at stake, confirm the current figures with the linked official source or a qualified adviser.

Where to start

Estimates for general information only, not financial or tax advice. Rules and rates differ by country and change over time — check the figures on each calculator against the linked official source.