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 Charitable Giving: Smart from the Heart Do you have causes that you want to support with donations? A Look at Whole Life Insurance Whole life insurance remains in force as long as you remain current with premiums. Here's how it works. Jane Bond: Infiltrating the Market Agent Jane Bond is on the case, cracking the code on bonds.