Calculators that show their working.
Each calculator estimates a figure from published rules, lists the sources it used and says what it does not cover.
Interactive calculators
Enter your own figures and get a personalised estimate with a line-by-line 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.
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UK salary guides
Precomputed take-home pay estimates at significant UK tax thresholds, with full statutory breakdowns and marginal-rate analysis.
- United Kingdom
£50,270 Salary After Tax UK 2026–27
Take-home pay estimate on a £50,270 annual salary for 2026–27: £39,714.64 net pay (£3,309.55 per month) with £7,540 Income Tax and £3,015.36 National Insurance.
Open calculator - United Kingdom
£100,000 Salary After Tax UK 2026–27
Take-home pay estimate on a £100,000 annual salary for 2026–27: £68,557.96 net pay (£5,713.16 per month) with £27,432.00 Income Tax and £4,010.04 National Insurance.
Open calculator - United Kingdom
£125,140 Salary After Tax UK 2026–27
Take-home pay estimate on a £125,140 annual salary for 2026–27: £78,111.16 net pay (£6,509.26 per month) with £42,516.00 Income Tax and £4,512.84 National Insurance.
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Tax tools
Add or remove VAT or GST with official rounding, plus rate reference tables.
- United Kingdom
UK VAT Calculator 2026–27: Add or Remove VAT
Calculate UK VAT at standard 20%, reduced 5%, or 0% rates. Add VAT to net prices or remove VAT from gross totals with exact penny rounding.
Open calculator - Australia
Australia GST Calculator: Add or Remove GST
Calculate Australian Goods and Services Tax (10%). Add GST to net amounts or remove the 1/11th tax fraction from gross prices with official ATO cent rounding.
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Financial tools
Universal loan and mortgage calculators with full amortization schedules.
Tax guides & financial analysis
In-depth articles explaining the statutory mechanics, rounding rules, and economic concepts behind our calculators.
Tax, Salary & Calculation Guides
Statutory threshold breakdowns, the £100k taper trap, sales tax math, and loan amortization.
Tax Threshold & Fiscal Drag Insights
Analysis of frozen allowances, effective vs marginal tax rates, and UK vs Australia tax structures.
Our Calculation Standards
Sources shown
Official sources and the date they were last checked appear on every calculator.
Working shown
Results come with a line-by-line breakdown.
Limits stated
Situations a calculator does not cover are listed, and no figure is shown for them.