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 Best-Performing Asset Classes Bonds may outperform stocks one year only to have stocks rebound the next. The Cycle of Investing Understanding the cycle of investing may help you avoid easy pitfalls. Managing Money as a Couple Keys to preparing to grow wealthy together.