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 Will Power Preparing for the eventual distribution of your assets may not sound enticing. But a will puts the power in your hands. Five Most Overlooked Tax Deductions Five overlooked tax deductions to help manage your tax bill. Where Will Your Retirement Money Come From? Retirement income may come from a variety of sources. Here's an overview of the six main sources.