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 FIRE Retirement This short, informative article teaches the basics of the FIRE movement. What Is My Risk Tolerance? This questionnaire will help determine your tolerance for investment risk. Bi-Weekly Payments This calculator estimates the savings from paying a mortgage bi-weekly instead of monthly.