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 Mastering Mobile Lingo Do you understand these common mobile slang terms? Buying Auto Insurance For Teen Drivers Tips on insuring your teen driver. A Penny Saved is Two Pennies Earned Here are some simple and inexpensive energy-saving tips that may help you save money.