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 Medicare Advantage 101 Overview of Medicare Advantage, what’s in them, special rules, and more. Global and International Funds Investors seeking world investments can choose between global and international funds. What's the difference? Inflation & Retirement Estimate how much income may be needed at retirement to maintain your standard of living.