Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Related Content Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one. What’s My 2024 Tax Bracket? Check out this handy reference of updated ranges from the IRS in case your designated bracket has changed. New Retirement Contribution Limits for 2024 A look at the new, record-high retirement contribution limits from the IRS.