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 Historical Inflation This calculator shows how inflation over the years has impacted purchasing power. The Sequence of Returns A look at how variable rates of return impact investors over time. Finding the Balance The sandwich generation faces unique challenges. For many, meeting needs is a matter of finding a balance.