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 Question Thank you! Oops! Related Content The Cycle of Investing Understanding the cycle of investing may help you avoid easy pitfalls. Retirement Redefined Around the country, attitudes about retirement are shifting. The Five Basics of Financial Literacy How literate are you when it comes to your finances? Brush up with these five basics.