How to use the tax calculator
Enter your gross annual income, any deductions (e.g. standard deduction, allowances), and your applicable flat tax rate. The calculator shows taxable income, estimated tax, net income, and your effective rate.
Tax rate reference
US federal marginal rates for 2024 range from 10% to 37%. Many states add 3-9%. The UK basic rate is 20%; higher rate 40%. Use your own country's rate for accurate results.
Frequently Asked Questions
Does this support tax brackets?
This calculator uses a flat rate for simplicity and universality. For bracket-based calculations, apply it to each bracket separately and sum the results.
What is the effective rate?
The effective rate is the percentage of gross income paid as tax (tax / gross income x 100). It is always lower than the marginal rate because only the taxable portion is taxed.