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 A Fruitful Retirement: Social Security Benefit Taking your Social Security benefits at the right time may help maximize your benefit. Financial Aid for Students 101 Help your college-bound child explore scholarships, grants, and more with this article on paying for higher education. What is the Value of Your Business? Ascertaining the value of your business is important for a variety of reasons.