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 The Average American Budget Learn about the average American budget in this fun and interactive piece. When Does Your Personal Car Become a Commercial Vehicle? At what point can you call a personal vehicle commercial? Replacing Your Medicare Card Learn how to replace your lost, stolen, or damaged Medicare card in this helpful article.