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 The Fed and How It Got That Way Here is a quick history of the Federal Reserve and an overview of what it does. Reviewing Your Life Insurance Needs Learn how the review process works and how it may help you better understand your Life Insurance. Acres of Diamonds In life it often happens that the answers to our most pressing questions are right in our own backyards.