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 Who Is Your Trusted Contact? This investment account question is vital and answered as early as possible. 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. Does Your Credit Score Affect Your Insurance Rates? Your credit score may influence how much you pay for auto and home insurance.