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 Social Security Benefits: How Much Will I Receive Calculating your potential Social Security benefit is a three-step process. U.S. Personal Savings Rate What can be learned from the savings rate? The Richest Man in Babylon In good times and bad, consistently saving a percentage of your income is a sound financial practice.