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 Retirement Redefined Around the country, attitudes about retirement are shifting. Critical Estate Documents Sound estate management includes creating financial and healthcare documents. Here's an inside look. A Cheat Sheet for Sending Your Kid to College Dropping off your child is loaded with emotions; here are a few tips for a smoother experience.