Contributions to a retirement plan can only be made from compensation, which, in the case of a selfemployed individual, is earned income. S Corps must follow certain rules for retirement plans and contributions.Learn how to correctly handle S Corp retirement contributions. Scorp owners, and their spouses have a vast array of retirement plan options to tap into. A shortlist of the most common retirement plans include: An Individual Retirement Account, or IRA, often represents a really good option for an S corporation owner. To take the credit, use Form 8880, Credit for Qualified Retirement Savings Contributions. Corporations and S corporations. The Solo 401k is a fantastic Single Owner S Corp retirement plan option. I don't believe the 10 hour per week employee would want to use any of their wages for a retirement plan.