Thus, for example, a tax-exempt nonprofit corporation pursuing a social mission and a for-profit corporation operating a business can join together and form a joint venture using an LLC as the vehicle for the enterprise. The operating agreement would spell out the rights and obligations of each member. However, each member would be bound by the laws and rules governing its own existence, so that the nonprofit may not confer an undue economic benefit on the for-profit coventurer, nor may the business corporation use the joint venture to do something that it could not do directly.
The IRS has addressed the circumstances in which tax-exempt social and charitable enterprises may engage in joint ventures with for-profit entities, and has adopted rules that govern the kinds of benefits that tax-exempt enterprises can confer on for-profit entities in the context of joint ventures. The IRS rules are extremely complicated. A tax-exempt social enterprise should not enter into a joint venture with a for-profit entity without first seeking advice from expert counsel.
Sanders, Michael I., Joint Ventures Involving Tax-Exempt Organizations (John Wiley & Sons, 3d revised ed 2007).