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 Can a Million Dollars Buy You? $1 million in a diversified portfolio could help finance part of your retirement. The Three Keys to a Great Password Have fun and learn how to craft the perfect password with the help of this highly engaging infographic. Lifetime of Earnings Estimate how much you have the potential to earn during your working years.