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 White Elephant Inheritance This article deals with how one might deal with a burdensome inheritance. Succeeding at Business Succession There are a number of reasons for business owners to consider a business succession plan sooner rather than later. Choosing a Retirement Plan that Fits Your Business To choose a plan, it’s important to ask yourself four key questions.