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 Question Thank you! Oops! Related Content What Is a Roth 401(k)? Roth 401(k) plans combine features of traditional 401(k) plans with those of a Roth IRA. My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. Acres of Diamonds In life it often happens that the answers to our most pressing questions are right in our own backyards.