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 Mastering Mobile Lingo Do you understand these common mobile slang terms? Why Regular Rebalancing Makes Sense Without your knowing, your investment portfolio could be off-kilter. Conquering Retirement Challenges for Women Looking ahead can help you conquer these unique obstacles.