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 Money that Buys Good Health is Never Ill Spent It's important to make sure your retirement strategy anticipates health-care expenses. How Big is Money? Learn a little about worldwide currency in this fun infographic Conquering Retirement Challenges for Women Looking ahead can help you conquer these unique obstacles.