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 Question Thank you! Oops! Related Content Protection Against Uninsured Drivers You’re hit by an uninsured driver. Now what? Are you protected against financial losses? How to Read Your Credit Report Solve a mystery while learning how important your credit report is with this story-driven interactive. What Do Your Taxes Pay For? Here's a breakdown of how the federal government spends your tax money.