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 Split Annuity Strategy Here's one strategy that combines two different annuities to generate income and rebuild principal. Social Security Benefits: How Much Will I Receive Calculating your potential Social Security benefit is a three-step process. 5 Benefits of Working in Retirement Here are 5 reason why you may consider working through retirement.