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 Why Everyone Needs an Estate Strategy Do you have an estate strategy? You should. The Lowdown on Those Free Credit Scores What’s the deal with your yearly free credit report? Saving for College 101 Here’s a crash course on saving for college.