Social Security Taxes Estimate how much of your Social Security benefit may be considered taxable. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Roth 401(k) vs. Traditional 401(k) This calculator compares employee contributions to a Roth 401(k) and a traditional 401(k). The Facts About Income Tax Millions faithfully file their 1040 forms each April. But some things about federal income taxes may surprise you. The Utility of Sector Investing Successful sector investing is dependent upon an accurate analysis about when to rotate in and out.