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 Your DNA Test Preparing for the unexpected can make all the difference if your family relies on your income. Choosing a Retirement Plan that Fits Your Business To choose a plan, it’s important to ask yourself four key questions. How Women Can Prepare For Retirement Are women prepared for a 20-year retirement?