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 The Utility of Sector Investing Successful sector investing is dependent upon an accurate analysis about when to rotate in and out. How Compound Interest Works Use this calculator to better see the potential impact of compound interest on an asset. The Cost of Procrastination Procrastination can be costly. When you get a late start, it may be difficult to make up for lost time.