Unrelated Business Income Tax (UBIT) — When Nonprofits Pay Corporate Tax

A tax-exempt organization isn't exempt from all taxes — it's exempt from income taxes on income that furthers its exempt purpose. When a nonprofit hospital runs a coffee shop, a university holds a patent portfolio and licenses technology to corporations, or a trade association rents out its conference center to for-profit businesses, that income can be taxable. The Unrelated Business Income Tax (UBIT), imposed by 26 U.S.C. §§ 511–514, requires tax-exempt organizations to pay corporate income tax (currently 21%) on income from any trade or business they regularly conduct that is not substantially related to their exempt purpose. UBIT exists to prevent tax-exempt organizations from using their tax-free status to compete unfairly with taxable businesses in commercial markets. The rules draw a line between an exempt organization's primary mission (tax-free) and its commercial side ventures (taxable) — and the line isn't always obvious. Since the 2017 TCJA, each unrelated business must be accounted for separately (the "silo rule"), meaning a profitable parking lot can't offset losses from a money-losing bookstore.

Current Law (2026)

Legal Authority

• 26 U.S.C. § 511 — Imposition of tax: every tax-exempt organization (§ 501(a)) and every college and university that is a government instrumentality is subject to tax at the regular corporate rate on its "unrelated business taxable income"; the tax applies even though the organization is otherwise completely exempt from income taxes on its core activities
• 26 U.S.C. § 512 — Unrelated business taxable income: UBTI is gross income from an unrelated trade or business regularly carried on, less deductions directly connected to that business, subject to modifications; the modifications exclude passive income (dividends, interest, annuities, royalties), rent from real property (unless debt-financed), gains from asset sales, income from research for government entities, and other specified categories; post-TCJA, each trade or business is computed separately (the silo rule)
• 26 U.S.C. § 513 — Unrelated trade or business: defined as any trade or business the conduct of which is "not substantially related" (aside from the organization's need for income) to the performance of its exempt function; exceptions include: businesses where substantially all work is performed by unpaid volunteers; businesses involving selling donated merchandise; certain hospital services; gaming income (bingo); certain trade shows; and low-cost item premiums solicited in connection with charitable fundraising
• 26 U.S.C. § 514 — Unrelated debt-financed income: when an exempt organization holds "debt-financed property" (property acquired or improved with borrowed funds), the gross income from that property is UBTI in proportion to the "acquisition indebtedness" (average debt) as a percentage of the average adjusted basis; applies to investment property, rental real estate bought on margin, and partnership interests where the entity uses leverage

The Three-Part Test for UBIT

For income to be taxable as UBTI, it must satisfy all three prongs:

1. Trade or business: Is the activity a trade or business? (Regular activity with intent to produce income)
2. Regularly carried on: Is it conducted with a frequency and continuity comparable to the way a taxable commercial entity would conduct the same activity?
3. Not substantially related: Is the activity unrelated to the organization's exempt purpose?

An annual charity auction run by volunteers is probably not "regularly carried on." A thrift store operated year-round with paid employees is. A law school clinic charging clients for services may be substantially related to its educational mission (training law students). A law school that rents out its building to a for-profit law firm is not.

Exclusions from UBTI: Even if an activity is regularly conducted and unrelated, several categories of passive income are expressly excluded from UBTI:

• Dividends and interest: A nonprofit's investment portfolio generating dividends, interest, and annuities is not UBTI — with an important exception for debt-financed property under § 514
• Rents from real property: Rental income from land and buildings is not UBTI (again, unless debt-financed); rents from personal property (equipment rental) can be UBTI
• Royalties: Passive royalties from intellectual property (licensing the organization's name, trademarks, or patents) are excluded — as long as the nonprofit isn't providing significant services in connection with the license
• Capital gains: Gains from selling investments and property are generally excluded
• Research income: Income from research for federal, state, or local government entities, or fundamental research whose results are available to the public, is excluded

The TCJA Silo Rule

Before 2018, an exempt organization could net losses from one unrelated business against profits from another. The 2017 TCJA eliminated this by requiring each "separate unrelated trade or business" to be computed independently. This means:

• A hospital that runs a profitable gift shop cannot use losses from a money-losing parking garage to reduce its UBTI
• Each unrelated activity stands alone for purposes of computing the tax
• NOL carryforwards generated before 2018 can offset UBTI generally; post-2017 NOLs from a specific business can only offset income from that same business

The silo rule dramatically increased the UBIT burden for organizations with multiple commercial activities, particularly large universities and hospital systems.

Debt-Financed Income: The Leverage Trap

Section 514 is a trap for organizations that invest in leveraged assets. The basic rule: if an exempt organization borrows money to acquire property, the income from that property is UBTI in proportion to the debt.

Example: A university endowment buys a rental building for $10 million, with $7 million of the purchase price borrowed on a mortgage. The debt-to-basis ratio is 70%. If the building generates $500,000 of annual rental income, $350,000 (70%) is UBTI. If the endowment sells the building for a gain, 70% of the gain is UBTI.

This rule catches:

• Real estate investments using leverage (common in endowment portfolios)
• Investments in master limited partnerships (MLPs) that use debt at the partnership level — the IRA or endowment investor's share of the partnership's debt can create UBTI
• Private equity or hedge fund investments where the fund uses leverage

Many university endowments and charitable remainder trusts have dramatically reduced their MLP holdings because of the UBTI complications.

UBIT on Retirement Accounts

Individual retirement accounts (IRAs and § 401(a) plans) are tax-exempt entities — they don't pay income tax on dividends, interest, or gains. But IRAs are subject to UBIT under the same rules. An IRA that:

• Invests in a master limited partnership (MLP) that conducts business operations can receive UBTI
• Holds real estate on margin (debt-financed property under § 514) has UBTI on the leveraged portion
• Invests in an operating business through an LLC taxed as a partnership may have UBTI

When an IRA's UBTI exceeds $1,000 in a year, the IRA itself (not the IRA owner) must file Form 990-T and pay the 21% corporate tax on the excess. The custodian may do this automatically, or the IRA owner may need to coordinate with the custodian.

How It Affects You

If you're a nonprofit executive or board member: Know whether your organization's commercial activities generate UBTI before launching them — retrofitting a revenue-generating activity into a "related" purpose is much harder than designing it correctly from the start. Common UBTI triggers: fitness centers open to the public (vs. members only), hospital parking lots (even if profitable only incidentally), university bookstores selling general merchandise alongside textbooks, trade association affinity insurance programs, and licensing of organization names and logos bundled with ongoing services. File Form 990-T if UBTI exceeds $1,000 in any year — the threshold is low, and failure to file exposes the organization to penalty. Since 2018 (TCJA), each unrelated business activity is "siloed" — you cannot offset losses from one unrelated activity against income from another, which dramatically changes the tax math for organizations with multiple commercial activities.

If you lead a church or religious organization: UBIT applies to churches — there is no religious exemption from unrelated business income taxation. A church leasing its fellowship hall to for-profit businesses, operating a day care open to non-members at commercial rates, or running a bookstore that sells general consumer goods alongside religious materials generates UBTI on the commercial activity. Churches don't file Form 990, but they must file Form 990-T if they have more than $1,000 of UBTI. The clergy housing allowance and other church-specific provisions do not affect UBIT. If your church is considering a new commercial venture (commercial real estate, a café, a school), get a UBIT analysis before opening — the related vs. unrelated determination and the fractionalization rules are traps for well-intentioned programs.

If you have a self-directed IRA investing in alternative assets: If your IRA invests in an operating business through an LLC, real estate with mortgage leverage, or a limited partnership that generates business income, check for UBTI exposure. UBTI above $1,000 in your IRA triggers a Form 990-T filing and 21% tax paid by the IRA — reducing the tax-advantaged balance without any offsetting deduction. Debt-financed real estate income (§ 514 "unrelated debt-financed income") is the most common source of IRA UBTI: if your IRA's LLC borrows to buy rental property, the income and gain proportional to the borrowed funds is UBTI. All-cash real estate investments avoid this; leveraged investments don't. Alternative asset custodians handling self-directed IRAs typically notify you of UBTI allocations on your K-1 — watch for boxes 20V or 20AE on your K-1 allocating UBTI amounts.

If you manage investments for a university, foundation, or hospital endowment: The TCJA's silo rule has fundamentally changed UBTI planning for endowments. Before 2018, losses from one commercial activity could offset income from another. Now each unrelated business is tracked separately — a losing fitness center cannot offset income from a leveraged real estate fund. Endowment managers must track which alternative investments generate UBTI by business line and maintain separate NOL carryforwards for each "silo." The practical result: many endowments now model the after-UBIT return on leveraged alternatives before investing, since the UBIT on leveraged real estate and private credit can reduce effective returns significantly. Some endowments have restructured allocations toward UBIT-exempt alternatives (equity-only real estate, royalties from acquired patents) to avoid the administrative burden entirely.

State Variations

Most states with corporate income taxes apply their own version of UBIT on exempt organizations' unrelated business income. States often conform to the federal UBTI definition but may apply different rates or have different modifications. California and New York impose state corporate tax on UBTI at their respective corporate rates. Some states have challenged whether the TCJA silo rule applies at the state level, creating potential conformity issues for organizations operating in multiple states.

Pending Legislation

Congress repealed the TCJA's "parking UBIT" provision — which had made employer-provided parking benefits from exempt organizations subject to UBIT — effective for amounts paid or incurred after December 31, 2019, through the Further Consolidated Appropriations Act of 2020. The silo rule remains controversial and has been the subject of proposed legislation that would revert to pre-TCJA netting across businesses. No major changes are currently pending, but the silo rule is regularly included in discussion drafts of technical corrections legislation.

Recent Developments

The IRS issued Notice 2018-67 and proposed regulations in 2018 providing guidance on the silo rule and how to identify "separate unrelated trades or businesses," particularly for investment activities. Final regulations under § 512 were issued in November 2020, clarifying how the silo rule applies to investment activities of exempt organizations and providing a favorable "investment activities" exception that allows certain portfolio investments to be treated as a single trade or business rather than requiring silo-by-silo treatment. The parking UBIT repeal in 2020 resolved one of the most controversial TCJA provisions affecting exempt organizations.

• OBBBA and nonprofit UBIT provisions (2025): The One Big Beautiful Bill Act included proposals to expand UBIT to cover certain investment income earned by large university endowments and to impose additional excise taxes on university investment returns above 1.4% of net assets. The university endowment excise tax (enacted at 1.4% in 2017 TCJA) was proposed for expansion to cover more universities. Final OBBBA provisions on nonprofit taxation were among the most contested in Senate Finance Committee markup, with higher-education lobbyists securing modifications that preserved existing TCJA endowment tax thresholds.
• IRS nonprofit compliance initiative — UBIT audit surge: The IRS Tax Exempt and Government Entities division launched a targeted UBIT compliance initiative in 2025, focusing on large nonprofit health systems, university research commercialization activities, and social welfare organizations with significant commercial real estate holdings. IRS identified approximately $2 billion in potential underreported UBIT from 2019-2023 tax years through AI-assisted return screening. Audit notices have focused on whether "dual-use" facilities (fitness centers, parking garages, restaurants) are truly for-benefit-of-members or primarily commercial operations.
• Digital advertising and UBIT — platform revenue debate: Several large nonprofits — including major media organizations with tax-exempt status and university-affiliated publishers — have faced IRS scrutiny over whether digital advertising revenue on their websites constitutes UBIT. The IRS's position: advertising sold to the general public on an exempt organization's website is an unrelated trade or business subject to UBIT, even if the website primarily serves an exempt purpose. Tax courts have issued conflicting decisions; the issue is increasingly significant as nonprofits rely on digital revenue streams.
• Trump administration and exempt organization enforcement: The Trump administration's pressure on nonprofit organizations alleged to support "anti-American" or politically disfavored activities raised UBIT-adjacent questions about whether certain advocacy activities could recharacterize as commercial and taxable. IRS guidance under Exempt Organizations declined to change UBIT rules for advocacy activities, but uncertainty about enforcement priorities has caused some nonprofits to restructure commercial activities into for-profit subsidiaries to reduce audit exposure.