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 How to Make the Tax Code Work for You When you take the time to learn more about how it works, you may be able to put the tax code to work for you. Insurance Needs Assessment: For Empty Nesters and Retirees Do your insurance needs stay the same when the nest empties? Countering Counterfeit Currency Combating counterfeiting remains core to preserving the integrity of the nation’s money.