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 To Catch a Thief Having your identity stolen may result in financial loss plus the cost of trying to restore your good name. Password Protection Strategies Simple steps may help you foil hackers and protect your privacy. The Average American Budget Learn about the average American budget in this fun and interactive piece.