The short answer
A qualified opportunity zone business (QOZB) is a trade or business, held by a qualified opportunity fund through stock or a partnership interest, that keeps substantially all of its tangible property in an Opportunity Zone and meets income, intangible-property and financial-asset tests. OZ 2.0 left these tests in place but added annual statements the business must furnish to its fund.
Where a QOZB fits
A qualified opportunity fund (QOF) can meet its 90% asset test in two ways. It can own qualified opportunity zone business property directly, or it can hold stock or a partnership interest in a qualified opportunity zone business: an operating entity that itself meets the tests below.1
Many sponsors use the two-tier structure: fund above, business below. The business-level tests offer some flexibility, such as the working-capital safe harbor, that isn’t available when the fund holds property directly. The trade-off is a second set of tests that has to be monitored for the life of the investment.
The tests a QOZB must meet
A trade or business is a QOZB only if it meets every one of these requirements:1,2
| Test | What it requires | Source |
|---|---|---|
| Tangible property | Substantially all (at least 70%) of the tangible property it owns or leases is qualified opportunity zone business property | § 1400Z-2(d)(3)(A)(i); Treas. Reg. § 1.1400Z2(d)-1 |
| Gross income | At least 50% of its total gross income comes from the active conduct of a business in the zone | § 1397C(b)(2) |
| Intangible property | A substantial portion (at least 40%) of its intangible property is used in the active conduct of that business | § 1397C(b)(4); Treas. Reg. § 1.1400Z2(d)-1 |
| Financial property | Less than 5% of the average of the aggregate unadjusted bases of its property is nonqualified financial property, subject to a working-capital exception | § 1397C(b)(8) |
| Excluded businesses | It is not a business listed in § 144(c)(6)(B): golf courses, country clubs, massage parlors, hot tub or suntan facilities, racetracks or other gambling facilities, or liquor stores | § 1400Z-2(d)(3)(A)(iii); § 144(c)(6)(B) |
The regulations add detail to each test, including safe harbors for showing where income is earned and how to value property.4
Working capital
A business that is raising and deploying capital may hold cash that would otherwise fail the financial-property test. The regulations provide a working-capital safe harbor: cash held under a written plan, with a written schedule for spending it within 31 months, is treated as reasonable working capital. Start-ups can use more than one plan, up to 62 months in total.4
The safe harbor depends on documentation: the plan, the schedule and evidence that spending follows them. Most working-capital problems are record-keeping problems.
What OZ 2.0 changed
The 2025 legislation did not change the business-level tests above. It did add a new obligation: a QOZB must now furnish annual statements to the QOFs that hold it, giving the information the fund needs for its own expanded return.5 Proposed regulations would require these statements by the first day of the second month after the business’s year ends (February 1 for calendar-year businesses). That deadline is proposed, not final.6
For property acquired after December 31, 2026, the tests also measure from the zone’s new designation dates rather than from 2018. See OZ 2.0: what changed.
Practical points
- Test continuously, not just on testing dates. A business that drifts out of compliance between testing dates often finds out too late to fix it.
- Leases count. Leased tangible property is part of the 70% test, and lease terms affect whether it qualifies.
- Growth can change the answer. New locations, new revenue lines and new intangible assets can each move a business across a threshold.
- Keep the evidence. Every test conclusion should be backed by records that can be shown to an auditor or a buyer.
Sources
- 26 U.S.C. § 1400Z-2(d)(3) (qualified opportunity zone business)
- 26 U.S.C. § 1397C(b) (enterprise zone business requirements, cross-referenced)
- 26 U.S.C. § 144(c)(6)(B) (excluded businesses)
- 26 C.F.R. § 1.1400Z2(d)-1 (qualified opportunity zone business property and QOZB rules)
- 26 U.S.C. § 6039L (statements furnished by QOZBs), added by Pub. L. 119-21 § 70421(d)
- Proposed regulations REG-116506-25, 91 FR 57968 (Sept. 11, 2026)
Cite this guide
QOZB Management, “What is a qualified opportunity zone business (QOZB)?,” Opportunity Zone Guides § 6.1 (last reviewed October 22, 2026), https://qozbmanagement.com/guides/what-is-a-qozb/.
QOZB Management works alongside your legal, tax and financial advisors. Nothing on this website is legal, tax or investment advice, and no outcome is guaranteed. Consult qualified counsel about your specific situation.