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 Is a SEP-IRA Right for Your Business? For some, the idea of establishing a retirement strategy evokes worries about complicated reporting and administration. What Can a Million Dollars Buy You? $1 million in a diversified portfolio could help finance part of your retirement. Surprise! You’ve Got Money! Here’s a quick guide to checking to see if you have unclaimed money.