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 Long Run: Women and Retirement For women, retirement strategy is a long race. It’s helpful to know the route. The Power of Compound Interest Learn how to harness the power of compound interest for your investments. Volunteering in Retirement For many, retirement includes contributing their time and talents to an organization in need.