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 Question Thank you! Oops! Related Content Volunteering in Retirement For many, retirement includes contributing their time and talents to an organization in need. Risk Perspective Is it possible to avoid loss? Not entirely, but you can attempt to manage risk. Year-End Charitable Gifting and You This article may help you maximize the benefits of your donation for your chosen charity.