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 Look at Diversification Diversification is an investment principle designed to manage risk, but it can't prevent against a loss. Choosing a Retirement Plan that Fits Your Business To choose a plan, it’s important to ask yourself four key questions. Managing the Risk of Outliving Your Money Steps to help you sustain and grow your retirement savings.