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UBIT: The Unrelated Business Income Tax, Explained

By The Ledgerism Editorial Team · The Ledgerism Brief Editorial Team produces original, methodology-disclosed accounting and tax research—data trackers, databases, and reference guides built to be the most-cited source in the field. Every figure is verified against primary sources including FASB, the IRS, the PCAOB, NASBA, the AICPA, and state boards of accountancy.

The unrelated business income tax (UBIT) is the federal tax a tax-exempt organization pays on net income from a trade or business that it regularly carries on and that is not substantially related to its exempt purpose. A nonprofit reports this income on Form 990-T once gross unrelated income reaches $1,000 in a year, and pays at the 21% corporate rate (trusts use compressed trust rates). Congress created UBIT in 1950 so exempt organizations could not use their tax status to undercut taxable businesses.

Being tax-exempt does not mean tax-free on every dollar. A charity, university, church, or trade association can run a genuine business on the side, but the profit from that side business may be taxed like a for-profit company’s profit. The rules turn on why the income arises, not on how the organization spends it. A museum can pour every dollar of a taxable venture into its exempt mission and still owe UBIT on that venture.

What is unrelated business income?

Unrelated business income is gross income from a trade or business, regularly carried on, that is not substantially related to the organization’s exempt purpose (aside from the need for funds). It is defined in Internal Revenue Code (IRC) Section 512 and taxed under Section 511. The tax applies to most 501(c) organizations, including charities, social clubs, and pension trusts, plus IRAs and state colleges.

The key word is “unrelated.” Relatedness is measured against the mission that earned the exemption, not against the fact that the money supports good works. A tax-exempt hospital gift shop that sells to patients and visitors is usually related. That same hospital renting its parking lot to commuters on weekends is usually not.

The 3-part test for UBIT

Income is taxed as unrelated business income only if it meets all three prongs of the statutory test: it is (1) a trade or business, (2) regularly carried on, and (3) not substantially related to the exempt purpose. If any one prong fails, the income escapes UBIT. The IRS and courts apply the test activity by activity, using the facts of each case.

Prong 1: Trade or business

A trade or business is any activity carried on to produce income from selling goods or performing services, and the activity generally must be run in a commercial manner. Producing income is central: fundraising that involves an exchange of value (a car wash, a paid seminar) can qualify, while pure gifts cannot. An activity can be a business even if it loses money in a given year.

Prong 2: Regularly carried on

An activity is regularly carried on if it shows a frequency and continuity, and is pursued in a manner, similar to comparable commercial activity by taxable businesses. A sandwich stand a charity runs every day is regular. The same stand operated only during a two-week county fair is generally not regular, because a commercial vendor would run it year-round. Seasonal businesses are judged against the normal season for that trade.

Prong 3: Not substantially related

Income is unrelated when the business activity does not contribute importantly to accomplishing the exempt purpose, other than through the funds it raises. The size and extent of the activity matter: an activity conducted on a scale larger than needed for the exempt purpose may be partly unrelated. Selling scientific research to the public can be related for a research nonprofit; selling advertising in that nonprofit’s magazine usually is not.

Exceptions and exclusions

Even when the 3-part test is met, several statutory exceptions can remove income from UBIT entirely. The most common are the volunteer labor exception, the convenience exception, and the donated goods exception under IRC Section 513, plus the passive income modifications under Section 512(b). These carve-outs are where most exempt organizations reduce or eliminate a potential UBIT bill.

• Volunteer labor: A business in which substantially all (about 85% or more) of the work is done by unpaid volunteers is not an unrelated trade or business.
• Convenience of members: A business carried on primarily for the convenience of members, students, patients, officers, or employees (a campus cafeteria, a hospital pharmacy for patients) is excluded.
• Donated merchandise: Selling merchandise, substantially all of which was received as gifts or contributions, such as a thrift shop, is excluded.
• Passive investment income: Dividends, interest, annuities, most royalties, and certain rents from real property are generally modified out of UBTI under Section 512(b).
• Qualified sponsorship payments: Payments where the sponsor gets only an acknowledgment (name or logo), with no substantial return benefit, are not taxable under Section 513(i).
• Research and other items: Income from certain research, and low-cost items distributed while soliciting donations, may also be excluded.

Two cautions apply. Passive income can lose its exclusion when it is debt-financed under Section 514, or when it comes from a controlled subsidiary under Section 512(b)(13). Advertising sold alongside a sponsorship or in a periodical is treated as taxable, even when a related acknowledgment is not.

The $1,000 filing threshold and specific deduction

An exempt organization must file Form 990-T when its gross income from unrelated businesses is $1,000 or more for the year. In computing the tax, the organization takes a specific deduction of $1,000, so a nonprofit with $1,000 of gross unrelated income and no expenses may file yet owe no tax. Both figures use $1,000, but one is a filing trigger (gross income) and the other is a deduction (against net income).

The specific deduction is generally $1,000 per organization, not $1,000 per business activity. An organization with three unrelated businesses claims one $1,000 specific deduction, not three. Claiming it on each activity is a common error that overstates the deduction.

Form 990-T: reporting and paying UBIT

Form 990-T, Exempt Organization Business Income Tax Return, is the return on which a nonprofit reports unrelated business income and pays UBIT. It is filed in addition to the annual information return (Form 990, 990-EZ, or 990-PF), not instead of it. Organizations taxable as corporations apply a flat 21% rate, the same corporate rate detailed in our guide to Form 1120, the C corporation tax return; trusts, including IRAs, use the compressed trust rate schedule, which can reach 37%.

For a detailed walkthrough of the annual information return that most exempt organizations file alongside the 990-T, see our guide to Form 990, the nonprofit information return. Which version of that return you file, and the schedules that go with it, are covered in our Form 990 instructions guide.

The 990-T generally must be filed electronically, and a copy filed by a 501(c)(3) is subject to public disclosure. If expected tax is $500 or more, the organization pays quarterly estimated tax during the year rather than in a lump sum at filing.

Siloing under Section 512(a)(6)

Section 512(a)(6), added by the Tax Cuts and Jobs Act of 2017, requires an organization with more than one unrelated trade or business to compute UBTI separately for each one. This “siloing” prevents losses from one business from offsetting profits from another. A loss in silo A can no longer shelter a profit in silo B, so total tax can be higher than under the old aggregate method.

Under final regulations published December 2, 2020, an organization identifies separate businesses using two-digit North American Industry Classification System (NAICS) codes. All activities sharing the same two-digit NAICS code are treated as one silo. Certain investment activities are grouped into a single silo under their own rules.

Net operating losses (NOLs) follow the silos. A post-2017 NOL from one silo can only offset future income of that same silo. Pre-2018 NOLs are more flexible: they may be deducted against total UBTI, and are applied before post-2017 silo NOLs. For a data view of how many organizations file and what the sector reports, see The U.S. Nonprofit Sector Report 2026.

Frequently asked questions

Does earning unrelated business income threaten a nonprofit’s tax-exempt status?

Usually not, if the unrelated activity stays insubstantial relative to the exempt mission. UBIT is designed to tax the income, not revoke exemption. The risk arises when unrelated business becomes a primary activity or the organization looks like a commercial enterprise. There is no fixed percentage in the statute; the IRS weighs the facts, including the scale and purpose of the activity.

What is the difference between the $1,000 threshold and the $1,000 deduction?

The $1,000 threshold is a filing trigger based on gross unrelated income: at $1,000 or more of gross income, Form 990-T is required. The $1,000 specific deduction reduces net unrelated income before tax and is claimed once per organization. An organization can be required to file yet owe no tax, because the specific deduction can wipe out a small net amount.

Is rental income subject to UBIT?

Often not. Rent from real property is generally excluded from UBTI under Section 512(b)(3). The exclusion can be lost in specific cases: if the property is debt-financed under Section 514, if substantial personal property is rented with the real property, if rent is tied to the tenant’s profits, or if the organization provides substantial services to tenants (as a hotel does). Rent from a controlled subsidiary can also be pulled back in under Section 512(b)(13).

Are advertising sales taxable to a nonprofit?

Generally yes. Selling advertising in a nonprofit’s magazine, program, or website is usually an unrelated trade or business, because the advertising itself does not further the exempt purpose. This differs from a qualified sponsorship payment, where a sponsor receives only an acknowledgment (name or logo) with no substantial return benefit and the payment is not taxed under Section 513(i).

What tax rate applies to unrelated business income?

Organizations taxable as corporations apply a flat 21% rate to net UBTI, the same corporate rate under IRC Section 11. Trusts, including IRAs and pension trusts, use the compressed trust rate schedule, which can reach 37% at a low income level. The specific deduction of $1,000 and any allowable business expenses reduce the taxable base before the rate applies.

How does siloing under Section 512(a)(6) change the math?

Before 2018, an organization could net losses from one unrelated business against gains from another. Section 512(a)(6) ended that by requiring separate computation for each business, identified by two-digit NAICS code. A loss in one silo can no longer offset a profit in a different silo, so an organization with a mix of profitable and unprofitable ventures may owe more tax than under the old aggregate approach.

Reviewed by The Ledgerism Editorial Team. Last reviewed: July 2026.

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