Self-Employed Retirement Plans Estimate the maximum contribution amount for a Self-Employed 401(k), SIMPLE IRA, or SEP. 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 Medicare Advantage Plans (Medicare Part C) Medicare Part C allows you to choose a Medicare Advantage plan. This article will help you decide if it's right for you. Catch-Up Contributions Workers 50+ may make contributions to their qualified retirement plans above the limits imposed on younger workers. Saving for College This calculator can help you estimate how much you should be saving for college.