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 How to Appeal Your Property Taxes For homeowners who think their property taxes are too high, there are ways to appeal. Social Security Benefits: How Much Will I Receive Calculating your potential Social Security benefit is a three-step process. Managing the Risk of Outliving Your Money Steps to help you sustain and grow your retirement savings.