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 Does Your Portfolio Fit Your Retirement Lifestyle? Lifestyle considerations in creating your retirement portfolio. Countering Counterfeit Currency Combating counterfeiting remains core to preserving the integrity of the nation’s money. The Utility of Sector Investing Successful sector investing is dependent upon an accurate analysis about when to rotate in and out.