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 Intellectual Property Rocks in a New Digital Era Intellectual property ownership and its implications for ordinary people and estates. Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns. Understanding Homeowners Insurance Purchasing homeowners insurance is critical for protecting your home.