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 Understanding Equity Compensation Net Unrealized Appreciation and how it affects tax responsibilities. Data Thieves from Outer Space Learn about the dangers of internet fraud with this highly educational and fun “pulp” comic. Financial Aid for Students 101 Help your college-bound child explore scholarships, grants, and more with this article on paying for higher education.