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 Potential Income from an IRA Estimate your monthly and annual income from various IRA types. Inflation & Your Money It's important to understand how inflation is reported and how it can affect investments. It May Be Time for a Financial Checkup It’s never a bad time to speak with your financial professional about changes in your situation.