What is a partner’s “compensation” for retirement plan purposes? Am I required to make contributions for my employee who has turned 70½ and is receiving RMDs? How much can I contribute to my self-employed SEP plan if I participate in my employer's SIMPLE IRA plan? I’m a shareholder and an employee of an S corporation. Can I contribute to the company’s 401(k) plan or establish a self-employed retirement plan based on my S corporation distributions? Are retirement plan contributions subject to withholding for FICA, Medicare or federal income tax?