Income Tax Calculator
Estimate your income tax liability for the US or UK — enter your annual income, choose your filing status, and see the breakdown across tax brackets.
What Does This Tool Do?
Estimate your income tax liability for US federal tax (2024 brackets) or UK income tax (2024/25 rates). Shows effective rate, marginal rate and take-home pay — with a clear disclaimer to consult a tax professional.
Key Features
US Federal
2024 brackets for single and married filing jointly.
UK Income Tax
2024/25 rates with personal allowance.
Effective Rate
Shows actual rate paid vs marginal rate.
Disclaimer
Estimate only — not professional tax advice.
How to Use
- Select the country.
- Enter your annual income.
- For US, select filing status.
- Click Calculate Tax.
Frequently Asked Questions
What is the difference between effective and marginal rate?▾
Marginal rate is the rate applied to your highest dollar of income. Effective rate is total tax ÷ total income — always lower because lower income is taxed at lower rates.
Does this include state tax or National Insurance?▾
No — US shows federal tax only (no state income tax). UK shows income tax only (no National Insurance, student loans or pension deductions).
How accurate is this?▾
This is an estimate for educational purposes using current official brackets. Individual circumstances vary significantly — consult a qualified tax professional for accurate advice.