What is UBTI (Unrelated Business Taxable Income)?
UBTI is income that would cause otherwise tax-exempt US investors — endowments, foundations, pensions, IRAs — to owe tax. Private funds generate it mainly through leverage and operating partnerships, which is why tax-exempt LPs often invest through offshore blocker structures.
US tax-exempt institutions don't pay tax on passive investment income — but Congress carved out "unrelated business taxable income" to stop tax-exempts from running businesses tax-free. In private funds, the two main UBTI triggers are debt-financed income (any income attributable to leverage, including standard buyout leverage at the fund level) and income from operating businesses structured as pass-through partnerships.
Fund structuring exists largely to manage this: offshore "blocker" corporations absorb UBTI-generating income and convert it into dividends, which are clean for tax-exempt investors. When endowments, foundations, and pension plans evaluate a fund, their tax counsel asks how the structure handles UBTI — and GPs raising from US tax-exempt LPs typically offer a parallel offshore or blocker vehicle in response.
Also known as: unrelated business taxable income, UBIT