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 A Penny Saved is Two Pennies Earned Here are some simple and inexpensive energy-saving tips that may help you save money. Countering Counterfeit Currency Combating counterfeiting remains core to preserving the integrity of the nation’s money. Retiring Wild: National Parks and You Get ready to enjoy America’s national park system with this helpful article.