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 How to Read Your Credit Report Solve a mystery while learning how important your credit report is with this story-driven interactive. Should I Accept a Free Credit Lock? Learn the ins and outs of credit locks, freezes, and more. Eight Mistakes That Can Upend Your Retirement There are common mistakes you can avoid when saving for retirement.