2020 Marginal Tax Rates Calculator Knowing your income tax rate can help you calculate your tax liability for unexpected income, retirement planning or investment income. This calculator helps you estimate your average tax rate, your tax bracket, and your marginal tax rate for the current tax year. Your effective tax rate is the true measure of how much you’ll give the IRS. “Effective” is a tax way of saying “average,” and it’s usually considerably less than your marginal tax rate, which is hinged to your tax bracket. Your effective tax rate works out to the percentage of your overall taxable income that you actually pay in taxes. Marginal Tax Rate Calculation. ufilechris replied to DavPol's topic in 2013. But how do know whether to say Yes, No, or ignore this MaxBack control? What are the ramifications of using (or not using) it? April 13, 2019; UFile v4.3 (Default) Powered by Invision Community