If an exempt organization regularly carries on a trade or business not substantially related to its exempt purpose the organization is subject to tax on its income from that unrelated trade or business. This can sometimes apply to revenue from corporate partnerships. These resources outline the rules related to Unrelated Business Income Tax, or UBIT, including which organizations are subject to the tax, what the requirements are for filing a tax return, what an unrelated trade or business is, and how to figure unrelated business taxable income.#tax