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 Money that Buys Good Health is Never Ill Spent It's important to make sure your retirement strategy anticipates health-care expenses. The Business Cycle Understanding the economy's cycles can help put current business conditions in better perspective. Retirement Traps to Avoid Beware of these traps that could upend your retirement.