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 Pay Yourself First It sounds simple, but paying yourself first can really pay off. Social Security: Five Facts You Need to Know Here are five facts about Social Security that are important to keep in mind. Impact of Taxes and Inflation Estimate the potential impact taxes and inflation can have on the purchasing power of an investment.