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 Estate Management 101 A will may be only one of the documents you need—and one factor to consider—when it comes to managing your estate. Disability Income This calculator estimates your chances of becoming disabled and your potential need for disability insurance. How to Make the Tax Code Work for You When you take the time to learn more about how it works, you may be able to put the tax code to work for you.