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 Paying Off a Credit Card Enter various payment options and determine how long it may take to pay off a credit card. How Compound Interest Works Use this calculator to better see the potential impact of compound interest on an asset. Financially Savvy at Six Figures Help your clients with these practical steps to make the most of their six-figure income.