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 Putting a Price Tag On Your Health Being healthy not only makes you feel good, it may also help you financially. Four Steps to Valuing an Estate Determining the value of your estate, or for someone who has passed away, can be a complex undertaking. Jane Bond: Infiltrating the Market Agent Jane Bond is on the case, cracking the code on bonds.