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 Women on the Rise Explore the growing influence women wield over the economy with this handy infographic. Jane Bond: Infiltrating the Market Agent Jane Bond is on the case, cracking the code on bonds. Investing with Your Heart For some, the social impact of investing is just as important as the return, perhaps more important.