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 Silver Sneakers 101 Medicare’s popular program, offering free gym membership and health education. Spotting Credit Trouble The wise use of credit is a critical skill. These 10 questions will help you assess your skill level. How to Make the Tax Code Work for You When you take the time to learn more about how it works, you may be able to put the tax code to work for you.