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 Exit Strategies of the Rich and Famous Estate conservation is too important to put off. Do you have a smart exit strategy? The Pre-Retirement Checklist This checklist can give you a quick snapshot of how prepared you are. What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability.