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 The Business Cycle How will you weather the ups and downs of the business cycle? Lifetime of Earnings Estimate how much you have the potential to earn during your working years. Saving Early & Letting Time Work For You The earlier you start pursuing financial goals, the better your outcome may be.