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 Earnings for All Seasons Earnings season can move markets. What is it and why is it important? Retirement Plan Detectives A couple become Retirement Plan Detectives, searching records from old employers. The Half Million Dollar Baby The true cost of raising a child may be far more than you expect.