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 What Is My Risk Tolerance? This questionnaire will help determine your tolerance for investment risk. What's My 2023 Tax Bracket? Check out this handy reference of updated ranges from the IRS in case your designated bracket has changed. How Will Working Affect Social Security Benefits? Knowing the rules may help you decide when to start benefits.