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 Investing for Impact Learn how to build a socially conscious investment portfolio and invest in your beliefs. Eight Mistakes That Can Upend Your Retirement There are common mistakes you can avoid when saving for retirement. Buying Auto Insurance For Teen Drivers Tips on insuring your teen driver.