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 Tax & Estate Strategies for Married LGBTQ+ Couples Learn how to maximize your tax and estate strategy as a married member of the LGBTQ+ community. Who Is Your Trusted Contact? This investment account question is vital and answered as early as possible. The Average American Budget Learn about the average American budget in this fun and interactive piece.