Contributions to a retirement plan can only be made from compensation, which, in the case of a selfemployed individual, is earned income. With a Solo 401(k), a self-employed business owner can make contributions as both the employee and the employer.In this article, we will explore several S Corp retirement plan options that offer significant tax savings. The Systems' proxy voting and shareholder initiatives are a form of active ownership (or "stewardship") intended to promote sound corporate governance. Sole proprietors, partnerships, and corporations, including S corporations, can set up SEPs. To be eligible for the STAR credit or exemption, you must own your home and it must be your primary residence. 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. File Necessary Forms: File IRS Form 5500 each year to report the plan's status and compliance. Employee Stock Ownership Plan (ESOPs).