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 Question Thank you! Oops! Related Content It Was the Best of Times, It Was the Worst of Times All about how missing the best market days (or the worst!) might affect your portfolio. The A, B, C, & D of Medicare Learn about all the parts of Medicare with this informative and enjoyable article. Why Regular Rebalancing Makes Sense Without your knowing, your investment portfolio could be off-kilter.