See how much federal and state income tax you'll owe using 2025 brackets
The US uses a progressive tax system where higher income is taxed at higher rates.
Your income up to the standard deduction amount is not taxed ($15,000 single, $30,000 married in 2025).
Your marginal rate is the highest bracket you reach; your effective rate is total tax divided by income.
Learn how to use financial calculators effectively for loans, mortgages, investments, and retirement planning.
Understand how the time value of money principle underlies all financial calculations including tax planning.