The two-prong test, IRC 512(b) passive income modifications, the 512(a)(6) silo rule post-OBBBA, debt-financed income under IRC 514, and Form 990-T mechanics for exempt-organization practitioners.
Unrelated business income tax (UBIT) is the income tax imposed under IRC 511 on the unrelated business taxable income (UBTI) of otherwise tax-exempt organizations. Congress enacted the UBIT regime as part of the Revenue Act of 1950, responding to concerns that tax-exempt organizations were using their tax-exempt status to conduct commercial enterprises in direct competition with taxable businesses that bear a full income tax burden. The statutory framework appears in IRC 511 through 514, with implementing regulations under Treas. Reg. sec. 1.511-1 through 1.514(b)-1.
The UBIT rules apply broadly. Organizations exempt under IRC 501(a), state colleges and universities, and certain employee benefit trusts may be subject to UBIT on income from unrelated trades or businesses they regularly carry on. The tax is imposed at the corporate rate (for organizations filing as corporations) or at the trust rate (for trusts), as provided in IRC 511(a) and (b). The tax-exempt status of the organization is not affected by the existence of UBIT liability -- the exempt status applies to income from the organization's exempt activities, while UBIT is a separate tax on the discrete category of income from unrelated commercial activity.
Three statutory provisions work together to define UBTI:
Practitioners advising exempt organizations must understand each layer: whether income is produced by a trade or business, whether that business is regularly carried on and unrelated to exempt purposes, whether any statutory modification under IRC 512(b) applies, whether IRC 512(b)(13) overrides that modification, whether the income is debt-financed under IRC 514, and how the IRC 512(a)(6) silo rule affects the netting of income and loss across multiple unrelated businesses.
IRC 512(a)(1) defines UBTI as the gross income derived by an exempt organization from any "unrelated trade or business" that is "regularly carried on," less the deductions directly connected with carrying on the trade or business. The definition, read with IRC 513, creates a three-element test that practitioners apply sequentially. In practice the test is often described as "two-prong" (trade or business, and unrelated), with "regularly carried on" treated as a sub-component of the first prong. The analysis is as follows.
The activity must constitute a "trade or business" within the meaning of IRC 162. Under Treas. Reg. sec. 1.513-1(b), the term includes any activity carried on for the production of income from the sale of goods or performance of services. The profit motive standard from IRC 183 is relevant: an activity conducted without a genuine profit motive (even if it generates gross receipts) may not qualify as a trade or business, and therefore would not generate UBTI. The IRS generally treats any activity that generates recurring commercial revenues as a trade or business unless the exempt organization can establish a non-commercial character.
Under Treas. Reg. sec. 1.513-1(c), an activity is "regularly carried on" if the frequency and continuity with which it is conducted, and the manner in which it is pursued, are comparable to commercial activities of nonexempt organizations. Activities conducted on a year-round or consistent weekly or monthly basis that mirror commercial-sector operations are regularly carried on. By contrast, activities conducted on a one-time or truly sporadic basis (for example, a single charity auction conducted over two days once per year) are generally not regularly carried on, provided the nonprofit does not engage in year-round preparatory activities that are themselves commercial in nature. When assessing intermittent activities, the regulations look to whether the activity is conducted with the same competitive regularity as a for-profit counterpart.
The "regularly carried on" prong catches seasonal and intermittent activities that compete with commercial enterprises. A tax-exempt organization that operates a parking lot or cafeteria on a regular schedule during business hours satisfies this prong regardless of whether it operates year-round. The IRS compares the duration and schedule of the exempt organization's activity against the commercial norms for that type of activity, not against the organization's own calendar.
Under IRC 513(a) and Treas. Reg. sec. 1.513-1(d), a trade or business is "unrelated" to an exempt organization's purpose if it does not contribute importantly to the accomplishment of the organization's exempt purposes (other than through the production of income). The "substantially related" standard requires more than a tenuous relationship to exempt activities: the activities themselves must contribute in a significant way to the achievement of the exempt mission. Size and extent matter -- even an activity that in theory relates to exempt purposes may be unrelated if it is conducted on a scale larger than reasonably necessary to carry out the exempt function.
Two common traps for practitioners: (1) the destination-of-income fallacy (income used to fund exempt activities is still UBTI if the activity generating it is unrelated), and (2) exploitation of exempt status (where the organization sells or licenses its intangible attributes, such as its name or membership list, to generate revenue, which may or may not be substantially related depending on the facts).
IRC 512(b) sets forth 14 "modifications" -- effectively exclusions -- that remove certain categories of passive and investment income from the definition of UBTI. The rationale is that passive income from investments does not represent the type of unfair commercial competition that Congress intended UBIT to address. These modifications are among the most frequently analyzed provisions in UBIT practice.
Dividends, interest, annuities, and royalties (IRC 512(b)(1)): Gross income from dividends, interest, payments with respect to securities loans (under IRC 512(a)(5)), annuities, and royalties (including overriding royalties) is excluded from UBTI, along with deductions directly connected with such income. This modification is the foundation of the passive income exception and is particularly important for investment portfolios, endowments, and royalty-generating intellectual property.
Rents from real property (IRC 512(b)(3)): Rents from real property are excluded from UBTI, provided the rents do not depend on the net income or profits of the lessee (which would make them UBTI under IRC 512(b)(3)(B)(ii)). Rents from personal property leased with real property are excluded only if the personal property rents are incidental (generally 10% or less of total rents). Mixed rents exceeding the incidental threshold are subject to UBTI for the personal property portion.
Capital gains (IRC 512(b)(5)): Gains or losses from the sale, exchange, or other disposition of property -- other than inventory or property held primarily for sale to customers in the ordinary course of a trade or business -- are excluded from UBTI. This modification is critical for investment portfolio management, real estate sales, and venture transactions.
Research income (IRC 512(b)(7)-(9)): Income from research performed for federal, state, and local government bodies (IRC 512(b)(7)), income from fundamental research carried on by universities, colleges, and hospitals whose results are freely available to the public (IRC 512(b)(8)), and income from research carried on by qualifying organizations (IRC 512(b)(9)), are excluded from UBTI.
The IRC 512(b) modifications are subject to two critical overrides that practitioners must apply before concluding that income is excluded from UBTI:
The IRC 512(b)(13) controlled entity exception overrides the general passive income modification: rents, royalties, annuities, and interest received from a controlled organization are UBTI to the extent deductible by the paying entity. Failure to apply IRC 512(b)(13) is among the most common UBIT errors at large nonprofits with supporting or subsidiary entities. Organizations that receive management fees, rent, interest, or royalties from controlled subsidiaries must run the IRC 512(b)(13) analysis before concluding that any 512(b) modification applies.
IRC 512(b)(13) is a targeted anti-avoidance provision that prevents exempt organizations from using related or subsidiary entities to strip income from the taxable entity (and thereby claim deductions for the payer) while routing that income to the exempt parent as non-UBTI passive income. Without IRC 512(b)(13), the passive income modifications in IRC 512(b)(1) and 512(b)(3) would allow a nonprofit to structure all subsidiary payments to it as royalties, rents, interest, or annuities -- all otherwise excluded from UBTI -- while the subsidiary deducts those same payments, shifting taxable income from the C-corp subsidiary to the exempt parent tax-free.
An organization is "controlled" for purposes of IRC 512(b)(13) if the exempt organization owns 50% or more of the total combined voting power of all classes of stock entitled to vote, or 50% or more of the total value of all outstanding stock (for corporations). For partnerships, the exempt organization must directly or indirectly own 50% or more of the profits or capital interests. The control determination is made by applying the constructive ownership rules of IRC 318 (for corporate entities) and relevant partnership attribution rules.
Under IRC 512(b)(13)(A), the amount includible as UBTI is the excess of any payment of interest, rent, annuities, or royalties received from the controlled entity over what would be deductible by the payer under the applicable IRC provision if the payer were paying an unrelated party. In practical terms, payments that are deductible by the controlled subsidiary are UBTI to the exempt parent. Where a payment is not deductible by the subsidiary (for example, where the payment exceeds arm's-length amounts and the excess is treated as a constructive distribution), that non-deductible excess may be excluded from UBTI.
Practitioners advising exempt organizations with subsidiary structures should review all intercompany payment streams -- management fees, intellectual property licenses, lease arrangements, intercompany loans -- under IRC 512(b)(13). Transfer pricing principles and arm's-length documentation are relevant both to tax compliance and to reducing UBTI exposure: where intercompany payments exceed arm's-length amounts, the non-deductible excess escapes IRC 512(b)(13) inclusion. This is a common area of IRS audit focus for large, complex exempt organizations.
Debt-financed income under IRC 514 is UBTI even if the income would otherwise qualify for a IRC 512(b) modification. An exempt organization that borrows to acquire dividend-paying stock or rental property must include the debt-financed portion as UBTI. The passive income exception does not apply to debt-financed property. Verify the current application of this rule and any applicable exceptions at IRS.gov before advising clients on leveraged investment strategies.
Prior to the Tax Cuts and Jobs Act of 2017 (TCJA), an exempt organization with multiple unrelated businesses could aggregate UBTI and UBTI losses across all of those businesses on a single Form 990-T. Losses from one unrelated business offset income from another, reducing overall UBIT liability. Section 13702 of the TCJA added IRC 512(a)(6), effective for taxable years beginning after December 31, 2017, which fundamentally changed this framework by requiring an exempt organization to compute UBTI separately with respect to each unrelated trade or business.
Under IRC 512(a)(6), an exempt organization with more than one unrelated trade or business:
Under the IRC 512(a)(6) silo rule (as modified by the OBBBA), each unrelated trade or business is siloed for loss purposes. Net operating losses from one unrelated business cannot offset UBTI from a different unrelated business. Pre-2018 NOLs arising under prior law (before IRC 512(a)(6) was effective) may be treated differently. Consult IRS Notice 2018-67 and IRS Notice 2020-56, along with any post-OBBBA IRS guidance, for the current treatment of pre-TCJA NOL carryforwards and confirm the applicable rules at IRS.gov.
The IRS has provided guidance on how to identify and distinguish separate unrelated trades or businesses for silo purposes, including the use of the North American Industry Classification System (NAICS) six-digit codes in Notice 2018-67. The general approach is that activities sharing the same six-digit NAICS code may be treated as a single trade or business, while activities in different NAICS categories are treated as separate businesses. IRS Notice 2020-56 extended and modified certain aspects of this framework. Post-OBBBA guidance may further modify these rules -- practitioners should confirm the current IRS position before applying any NAICS-based grouping approach.
Investment income that is not otherwise excluded by a IRC 512(b) modification (for example, UBTI generated through partnership investments or debt-financed investments) was addressed under IRS guidance as a separate, identified category of unrelated trade or business (investment activity). Post-OBBBA modifications to IRC 512(a)(6) may change the mechanics of this treatment; practitioners must consult the OBBBA statutory text and current IRS guidance.
The One Big Beautiful Budget Act (OBBBA) of 2026 enacted modifications to IRC 512(a)(6) that affect how exempt organizations compute UBTI under the silo rule. Because the OBBBA was enacted in 2026 and implementing Treasury guidance and IRS notices may not yet be fully issued, practitioners must consult the statutory text of the OBBBA and any IRS guidance published after enactment before relying on the pre-OBBBA framework for taxable years to which the new rules apply.
The OBBBA modifications to IRC 512(a)(6) address several areas of practitioner concern that arose under the TCJA version of the silo rule, including how investment income is siloed, the treatment of certain income streams that span multiple NAICS categories, and coordination with the IRC 514 debt-financed income rules. The modifications also interact with other OBBBA changes to the exempt organization tax rules, including changes to IRC 4960 on executive compensation excise taxes.
Practitioners advising exempt organizations on UBIT planning for taxable years 2026 and forward should:
Because the specific operative rules turn on the enacted statutory text and forthcoming IRS guidance, this guide does not describe the OBBBA modifications in technical detail -- doing so would risk misstating rules that remain subject to regulatory clarification. Confirm all OBBBA-related UBIT rules against the current version of IRC 512 and any applicable IRS guidance before filing or advising.
IRC 514 addresses one of the most significant UBIT traps for investment-focused exempt organizations: the conversion of otherwise passive (and otherwise excluded) income into UBTI when the income-producing property is acquired or held with borrowed funds. The debt-financed income rules operate as an override to the IRC 512(b) passive income modifications.
Under IRC 514(a), an exempt organization must include in UBTI its "unrelated debt-financed income" -- the gross income derived from debt-financed property multiplied by the "debt/basis percentage." The debt/basis percentage is the ratio of the average acquisition indebtedness with respect to the property for the taxable year to the average adjusted basis of the property during the taxable year. Any deductions directly connected with debt-financed property are allowable in the same proportion.
Illustration (for planning purposes only, not a legal threshold): If an exempt organization holds real property with an average adjusted basis of $1,000,000 and average acquisition indebtedness of $600,000 during the year (illustrative figures only), the debt/basis percentage would be 60%. If the property generates $100,000 of gross rental income (illustrative figure only), $60,000 of that income would be UBTI (subject to directly connected deductions at the same percentage). These figures are illustrations of the mechanical calculation only and do not represent any regulatory safe harbor or threshold.
IRC 514(c)(1) defines "acquisition indebtedness" as the outstanding amount of the principal indebtedness incurred by the organization in acquiring or improving the debt-financed property, or indebtedness that would not have been incurred but for the acquisition or improvement of the property. Debt incurred to rehabilitate or improve already-owned property also qualifies. The regulations under Treas. Reg. sec. 1.514(c)-1 address complex situations including mortgages assumed from sellers, partnership debt, and variable-rate financing.
IRC 514(b) provides several exceptions to the debt-financed income rules:
Investment partnership look-through requires an exempt organization partner to look through to its allocable share of partnership UBTI. The partnership's activities -- not the exempt organization's relationship to the partnership -- determine whether the income is UBTI. When a partnership borrows to acquire investments, an allocable share of that debt may constitute acquisition indebtedness at the exempt partner level under IRC 514, even if the exempt organization itself did not borrow directly. Practitioners must trace partnership-level debt through to the exempt partner's IRC 514 computation.
Exempt organizations frequently hold interests in investment partnerships -- private equity funds, hedge funds, real estate funds, and venture capital funds -- that generate income from activities that would be UBTI if conducted directly by the exempt organization. The IRC 512(c)(1) look-through rule requires exempt organization partners to include their allocable share of partnership UBTI in computing their own UBTI for Form 990-T purposes.
Under IRC 512(c)(1), if a trade or business regularly carried on by a partnership, of which an exempt organization is a partner, is an unrelated trade or business with respect to the exempt organization, then UBTI of the exempt organization is determined as if that trade or business were conducted directly by the organization. The exempt organization's UBTI includes its allocable share of the partnership's gross income from that unrelated trade or business, less its allocable share of directly connected deductions. This look-through rule applies regardless of whether the exempt organization is a limited partner or general partner, and regardless of the passivity of the investment.
Because the look-through rule can generate unexpected UBTI from investment fund holdings, many exempt organizations interpose a "blocker corporation" -- a C corporation wholly owned by the exempt organization -- between themselves and the UBTI-generating partnership or fund investment. The blocker absorbs the UBTI at the corporate level and pays corporate income tax on it. When the blocker distributes after-tax profits to the exempt organization parent, those distributions are dividends, which qualify for the IRC 512(b)(1) dividend modification and are excluded from UBTI.
The trade-off of the blocker structure is the additional layer of corporate income tax: income that flows through the blocker is taxed once at the corporate rate before distribution, whereas income flowing directly to the exempt organization would be taxed at the UBIT rate (also the corporate rate for corporate-form exempt organizations). The economic cost is therefore similar, but the blocker avoids the complications of the silo rule, the look-through computation, and (in some cases) the IRC 514 debt-financed income allocation. Additional state tax considerations and management of the blocker entity add to the compliance cost.
Exempt organizations that invest in partnerships generating UBTI should obtain Schedule K-1 information from fund managers and confirm whether the fund has implemented blocker structures at the fund level, which may reduce or eliminate UBTI flowing to the exempt partner. Many investment funds now routinely offer parallel blocker vehicles for exempt and foreign investors. Where no blocker is in place, the exempt organization must apply the IRC 512(c)(1) look-through and, where applicable, the IRC 514 debt-financed income computation, on a fund-by-fund and silo-by-silo basis under the IRC 512(a)(6) framework.
Form 990-T, "Exempt Organization Business Income Tax Return," is the federal return on which exempt organizations report UBTI and compute UBIT liability. The mechanics of Form 990-T reflect the silo structure under IRC 512(a)(6), the available deductions and modifications, and special rules for estimated tax payments and charitable contributions.
Form 990-T filing threshold: an exempt organization with $1,000 or more of gross UBTI from any unrelated trade or business must file Form 990-T. The $1,000 threshold (IRC 6012(a)(6)) applies to gross income before deductions, not net income. An organization with significant gross UBTI and an equal or greater amount of offsetting deductions still must file if its gross UBTI meets the threshold. Verify the current threshold and applicable IRS instructions at IRS.gov before each filing season.
For exempt organizations with a calendar taxable year, Form 990-T is due by April 15. Organizations with non-calendar fiscal years file by the 15th day of the fourth month after the close of the fiscal year. An automatic six-month extension is available by filing Form 8868. Unlike Form 990, Form 990-T is not filed with the IRS Center -- the applicable filing address varies; confirm the current mailing address or e-filing requirements at IRS.gov. Beginning in 2021, certain organizations (including those exempt under IRC 501(a) that are required to file Form 990-T) must file Form 990-T electronically.
Exempt organizations with anticipated UBIT liability of $500 or more (as set forth under IRC 6655 as applicable to exempt organizations) must make estimated tax payments. The payments are due quarterly: the 15th day of the 4th, 6th, 9th, and 12th months of the taxable year. The underpayment of estimated tax rules under IRC 6655 apply to exempt organizations in the same manner as they apply to C corporations, with the safe harbor provisions of IRC 6655(d) available. Confirm the current applicable estimated tax rules at IRS.gov and in the current Form 990-W (Estimated Tax on Unrelated Business Taxable Income for Tax-Exempt Organizations).
Under the IRC 512(a)(6) silo rule, Form 990-T requires separate reporting of income and deductions for each unrelated trade or business. The IRS has updated Form 990-T to include separate schedules (Schedule A) for each unrelated trade or business, with an identification of each business using a NAICS code or other applicable category. Income and loss from each silo are netted separately, and the results are carried to the main form. Post-OBBBA modifications to the silo rule may affect the form design and schedule structure -- consult the current Form 990-T instructions at IRS.gov.
Under IRC 512(b)(10), an exempt organization may deduct charitable contributions from its UBTI, subject to the limitation applicable to corporations under IRC 170(b)(2) (generally 10% of UBTI computed without regard to the charitable deduction). The deduction applies only against UBTI; it cannot be used to reduce income from exempt activities. Excess charitable contribution deductions from UBTI cannot be carried forward unless the organization qualifies under applicable carryforward rules. Practitioners advising exempt organizations that make significant grants or charitable contributions should factor the IRC 512(b)(10) deduction into UBIT projections.
IRC 512(a)(1) allows deductions from UBTI for expenses, depreciation, and similar items that are "directly connected with" the unrelated trade or business. Under Treas. Reg. sec. 1.512(a)-1(a), a deduction is directly connected with an unrelated trade or business if it has a proximate and primary relationship to the conduct of that business. Dual-use expenses (costs that serve both exempt and unrelated activities) must be allocated between exempt and unrelated uses on a reasonable basis. The allocation methodology must be consistent, documented, and supportable under audit.
The following table summarizes the 14 modifications under IRC 512(b). "Excluded from UBTI?" reflects the general rule absent any override (IRC 512(b)(13) or IRC 514). Always apply the controlled entity exception and debt-financed income analysis before concluding that income is excluded.
| IRC 512(b) Subsection | Modification Type | Excluded from UBTI? | Key Exception or Limitation |
|---|---|---|---|
| 512(b)(1) | Dividends | Yes (generally) | Override by IRC 512(b)(13) if from controlled entity; debt-financed dividends includible under IRC 514 |
| 512(b)(1) | Interest | Yes (generally) | Override by IRC 512(b)(13) if from controlled entity; debt-financed interest includible under IRC 514 |
| 512(b)(1) | Annuities | Yes (generally) | Override by IRC 512(b)(13) if from controlled entity |
| 512(b)(1) | Royalties | Yes (generally) | Override by IRC 512(b)(13) if from controlled entity; active licensing arrangements may not qualify as royalties |
| 512(b)(3) | Rents from real property | Yes (generally) | Profit-based rents excluded; personal property rents non-incidental included; override by IRC 512(b)(13); debt-financed rents under IRC 514 |
| 512(b)(3) | Rents from personal property (incidental) | Partial -- incidental only | Personal property rents exceeding incidental threshold (generally over 10% of total rents) are includible in UBTI; debt-financed property rules apply |
| 512(b)(5) | Capital gains from property (including securities) | Yes (generally) | Excludes gain from property held primarily for sale to customers in the ordinary course; does not apply to inventory; debt-financed property gain included under IRC 514 |
| 512(b)(7) | Research income (government-sponsored) | Yes | Applies to research performed for federal, state, or local government; results must be freely available |
| 512(b)(8) | Research income (fundamental research) | Yes | Applies to universities, colleges, and hospitals conducting fundamental research whose results are made freely available to the general public |
| 512(b)(9) | Research income (qualifying organizations) | Yes | Applies to organizations primarily operated for fundamental research results available to the general public; facts and circumstances determine qualification |
| 512(b)(13) | Controlled entity exception (override) | No -- this provision INCLUDES income as UBTI | Rents, royalties, annuities, and interest from 50%-or-more controlled entities are UBTI to the extent deductible by the payer; overrides IRC 512(b)(1) and 512(b)(3) modifications |
| 512(b)(10) | Charitable contribution deduction | Deduction -- reduces UBTI | Limited to 10% of UBTI (computed without the deduction) per IRC 170(b)(2); excess contributions generally not carried forward absent specific authorization |
| 512(b)(11) | Specific deduction ($1,000) | Deduction -- reduces UBTI | Each exempt organization is allowed a specific deduction of $1,000 from UBTI; for dioceses, provinces of religious orders, and conventions of churches, the deduction applies per parish or local unit |
This table is a summary for practitioner reference only. Statutory text under IRC 512 and applicable Treasury regulations govern in all cases. Verify current rule application at IRS.gov.
Unrelated business income tax (UBIT) is the income tax imposed under IRC 511 on the unrelated business taxable income (UBTI) earned by otherwise tax-exempt organizations. Congress enacted UBIT in 1950 to prevent tax-exempt organizations from competing with commercial businesses without bearing an income tax burden. The tax applies to organizations exempt under IRC 501(a) -- including IRC 501(c)(3) charitable organizations, IRC 501(c)(4) social welfare organizations, IRC 501(c)(6) trade associations, and many others -- as well as to state colleges and universities and certain employee benefit trusts. Tax-exempt status does not shield an organization from UBIT; the UBIT rules impose tax on discrete commercial activities while leaving the organization's exempt status and exempt-function income unaffected.
Under IRC 512(a)(1) and IRC 513(a), income is UBTI if it arises from a trade or business that is (1) regularly carried on and (2) not substantially related to the organization's exempt purpose (other than through production of income). The analysis is sequential: first, determine whether the activity constitutes a trade or business (conducted with a profit motive); second, determine whether it is regularly carried on (frequency and continuity comparable to commercial enterprises); and third, determine whether it is substantially unrelated to the exempt purpose (the activity itself, not the use of profits, must contribute importantly to accomplishing the exempt purpose). If any element fails, the income is not UBTI.
Under Treas. Reg. sec. 1.513-1(c), an activity is "regularly carried on" if its frequency and continuity are comparable to analogous activities of for-profit businesses. A year-round or recurring weekly or monthly activity is typically regularly carried on. A short-duration, genuinely sporadic activity -- such as a one-time auction lasting a few days -- is generally not regularly carried on. Seasonal activities present a middle ground: if a for-profit competitor would conduct the same activity for the same season, the IRS compares the duration and frequency to the commercial norm. Preparatory commercial activities conducted year-round to support an annual event may cause the event itself to be treated as regularly carried on. The determination is facts-and-circumstances based.
IRC 512(b) provides 14 modifications that exclude certain passive income categories from UBTI. The most significant exclusions are: dividends, interest, annuities, and royalties (IRC 512(b)(1)); rents from real property not based on lessee profits (IRC 512(b)(3)); capital gains from property other than inventory (IRC 512(b)(5)); and research income (IRC 512(b)(7)-(9)). These exclusions reflect Congress's judgment that passive investment income does not represent unfair competition with taxable businesses. Two critical overrides apply: income from controlled entities is UBTI under IRC 512(b)(13) regardless of the modification, and income from debt-financed property is UBTI under IRC 514 in proportion to the debt/basis ratio.
The IRC 512(a)(6) silo rule, added by the TCJA in 2017, requires an exempt organization to calculate UBTI separately for each unrelated trade or business. Losses from one unrelated trade or business cannot offset income from a different unrelated trade or business. Each silo's income or loss is tracked independently, and NOLs generated within a silo carry forward to offset future income from that same silo only. The OBBBA of 2026 modified IRC 512(a)(6), affecting how silos are identified and how certain income streams are categorized. Practitioners must consult the OBBBA statutory text and any IRS guidance issued after enactment -- the pre-2026 NAICS-based grouping framework under IRS Notice 2018-67 and Notice 2020-56 may have been modified by the OBBBA provisions.
Under IRC 514, income from debt-financed property is includible in UBTI in proportion to the ratio of average acquisition indebtedness to average adjusted basis (the "debt/basis percentage"). This rule applies even when the income type would otherwise be excluded from UBTI by a IRC 512(b) modification -- for example, rents from real property are generally excluded under IRC 512(b)(3), but if the property is debt-financed, the rented portion of income corresponding to the debt/basis percentage is UBTI. Exceptions exist for property used in the organization's exempt activities, property subject to the neighborhood land rule, and property held by certain qualified pension trusts. Practitioners should trace debt through investment partnerships under IRC 512(c)(1) look-through as well.
An exempt organization must file Form 990-T if it has $1,000 or more of gross income from any unrelated trade or business during the taxable year, as provided in IRC 6012(a)(6). The threshold is measured against gross income before any deductions -- not net income or net UBTI. An organization with gross UBTI exceeding $1,000 but net UBTI of zero (or a net loss) after deductions must still file Form 990-T. Form 990-T is due by the 15th day of the 4th month following the close of the taxable year (April 15 for calendar-year filers), with a six-month automatic extension available on Form 8868. Confirm the current threshold, filing address, and e-file requirements at IRS.gov.
A UBTI blocker corporation is a C corporation owned by an exempt organization, interposed between the exempt organization and a partnership or investment fund that generates UBTI (through look-through under IRC 512(c)(1) or debt-financed income under IRC 514). The C corporation absorbs the UBTI and pays corporate income tax on it. When the C corporation distributes after-tax profits to the exempt organization, those distributions are dividends excluded from UBTI under IRC 512(b)(1). Blocker structures are common in private equity, hedge fund, and real estate fund investments. The trade-off is an additional layer of corporate tax; practitioners weigh that cost against the cost of UBIT paid directly by the exempt organization, plus the compliance complexity of the silo rule and look-through computations.