Effective Tax Rate Calculator 2025 Married Jointly. To calculate your effective tax rate, find your total tax on your income tax return and divide it by your taxable income. Estimate your 2025 refund or tax bill with nerdwallet's federal income tax calculator.

This calculator is designed to estimate your total federal tax liability based on the information you provide and does not account for tax withholdings, state or local taxes, or complex tax situations involving additional forms, credits, or deductions. Estimate your income taxes by tax year.