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 Changing Unhealthy Behaviors Five phases to changing unhealthy behaviors. The Value of Insuring Against Life’s Risks Building wealth requires protection from the forces of wealth destruction. Earnings for All Seasons Earnings season can move markets. What is it and why is it important?