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 Creative Ways to Motivate Your Employees Five creative (and inexpensive) ideas for motivating your employees. Inflation & Your Money It's important to understand how inflation is reported and how it can affect investments. The Value of Insuring Against Life’s Risks Building wealth requires protection from the forces of wealth destruction.