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 Message Thank you! Oops! Related Content The Power of Compound Interest Learn how to harness the power of compound interest for your investments. When Should You Take Social Security Monthly Social Security payments differ substantially depending on when you start receiving benefits. Coaches Coaches have helped you your whole life, in ways big and small. We'd like to be one of them.