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 Net Unrealized Appreciation (NUA) Explained Have you considered the special tax treatment on company stock held in a 401(k) plan? Insuring Your Second Home There are unique risks of owning a second home and obtaining the proper coverage may protect you from financial risk. How Compound Interest Works Use this calculator to better see the potential impact of compound interest on an asset.