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 Choosing a Mortgage Selecting a mortgage isn't an easy process. Get a better understanding of how professionals make the right decisions. Test This is Public Facing Description of our test article. Enjoy! Retirement Is a Beginning Key questions to answer when you are considering retirement.