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 Volunteering in Retirement For many, retirement includes contributing their time and talents to an organization in need. Countering Counterfeit Currency Combating counterfeiting remains core to preserving the integrity of the nation’s money. Working With A Financial Professional A financial professional is an invaluable resource to help you untangle the complexities of whatever life throws at you.