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 Jane Bond: Infiltrating the Market Agent Jane Bond is on the case, cracking the code on bonds. A Look at Systematic Withdrawals This calculator may help you estimate how long funds may last given regular withdrawals. What Is the Dividend Yield? This calculator helps determine your pre-tax and after-tax dividend yield on a particular stock.