Contributions to a retirement plan can only be made from compensation, which, in the case of a selfemployed individual, is earned income. The title of this Plan shall be the "Harris Corporation Retirement Plan.Retirement plans can be an appealing aspect of your benefits package. With a Solo 401(k), a self-employed business owner can make contributions as both the employee and the employer. In this post, we identify the best 5 retirement plans for SCorporations. We will also show you why a SEP might not be the best plan. We've put together a guide to help you understand more about retirement income and protection planning. S Corps must follow certain rules for retirement plans and contributions. Learn how to correctly handle S Corp retirement contributions. One of the things S Corporation owners should think about is setting up a 401(k) plan.