About the Income Tax Calculator
Estimate your income tax and take-home pay using the latest brackets. The calculator supports Australian resident rates for 2026–27 (including the new 15% rate and Medicare levy), Sri Lankan personal income tax from April 2025 and US federal brackets for 2026.
How to use it
- Choose your country and tax year.
- Enter your annual gross income (or convert from monthly).
- Add any additional deductions.
- See tax by bracket, effective rate, marginal rate and take-home pay.
Formula & method
Tax = Σ (income within each bracket × bracket rate) + levies − offsetsFrequently asked questions
What is the difference between marginal and effective tax rate?
Your marginal rate applies to your last dollar of income. Your effective rate is total tax divided by total income — always lower under a progressive system.
What changed in Australia for 2026–27?
From 1 July 2026 the tax rate on income between $18,201 and $45,000 fell from 16% to 15%. It is legislated to fall to 14% from 1 July 2027.
What is the tax-free threshold in Sri Lanka?
From 1 April 2025 the personal relief is LKR 1,800,000 per year (LKR 150,000 per month). Income above that is taxed at 6%, 18%, 24%, 30% and 36%.
Results are estimates for general information only and are not financial, tax, legal or medical advice. Please confirm important decisions with a qualified professional.