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 How Stocks Work Understanding how a stock works is key to understanding your investments. What to Look for in Personal Finance Apps An increasing number have been developed to help individuals with their personal finances. To Catch a Thief Having your identity stolen may result in financial loss plus the cost of trying to restore your good name.