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 Should I Buy or Lease an Auto? This calculator compares the financial impact of leasing versus buying an automobile. A Checklist for When a Spouse or Parent Passes An overview of some fundamental steps when a loved one passes. Is Term Life Insurance for You? Term insurance is the simplest form of life insurance. Here's how it works.