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 Term vs. Permanent Life Insurance When considering life insurance, it's important to understand your options. Volunteering in Retirement For many, retirement includes contributing their time and talents to an organization in need. What's New for Social Security? There have been a number of changes to Social Security that may affect you, especially if you are nearing retirement.