SAGVIM
Calculators that show their working.
SAGVIM publishes calculators that estimate figures such as income tax from published rules. Each one shows how the result was reached, lists its sources and says what it does not cover.
Interactive calculators
All calculatorsEnter your own figures for a personalised breakdown.
- Australia
Australia income tax calculator 2026–27
Estimate annual income tax and Medicare levy for a single Australian resident, with a line-by-line breakdown.
Open calculator - United Kingdom
UK take-home pay calculator 2026–27
Estimate take-home pay in England, Wales or Northern Ireland: Income Tax, National Insurance, a student loan and a pension, with the working shown.
Open calculator
Looking for salary guides, VAT, GST, or loan calculators? Browse the full calculator catalogue.
How SAGVIM calculators work
Rules from official sources
Each calculator is built from published rules, and the sources and the date they were last checked are shown on the page.
Working you can follow
Results come with a line-by-line breakdown, so you can see how the figure was reached rather than just a total.
Clear about its limits
Every calculator lists the situations it does not cover. If your circumstances are outside them, it shows no figure rather than a wrong one.
Runs in your browser
What you type into a calculator is used in your browser to produce the estimate. It is not sent to SAGVIM.
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