The 90% Asset Test Under OZ 2.0: What's Changing and What It Means for Fund Compliance

The 90% asset test is the structural backbone of QOF compliance. Failing it triggers financial penalties. Failing it repeatedly creates legal and investor-relations exposure that compound over time. Under OZ 2.0, the stakes are higher — and the data required to document compliance is more detailed than ever.

What the 90% Asset Test Requires

Every Qualified Opportunity Fund is legally required to hold at least 90% of its total assets in qualified opportunity zone property (QOZP) — meaning property that is located in, or a business operating in, a designated Opportunity Zone. This is not a disclosure requirement. It is a substantive compliance test with financial consequences.

The test is measured at two points in every tax year: the last day of the first six-month period of the tax year, and the last day of the tax year itself. For a calendar-year fund, that means June 30 and December 31. A QOF's compliance score is the average of these two measurements. If the average falls below 90%, the fund faces a penalty — generally calculated as the amount by which the fund fell short of the threshold, multiplied by the applicable federal underpayment rate.

Notably, QOFs that invest in Qualified Opportunity Zone Businesses (QOZBs) rather than directly in property must ensure that the QOZBs themselves satisfy a separate set of operating standards. A QOZB must: hold at least 70% of its owned and leased tangible property as qualified opportunity zone business property; earn at least 50% of its gross revenue from active conduct of a trade or business within the OZ; use at least 40% of its intangible property in that active business; and limit non-qualified financial property (NQFP) to no more than 5% of average assets.

What Has Changed Under OZ 2.0

The core structure of the 90% asset test is unchanged under the OBBBA. The measurement dates, the penalty calculation, and the basic qualifying asset definitions carry over from OZ 1.0. What has changed are the compliance consequences, the reporting obligations that surround the test, and the structural treatment of rural funds.

Qualified Rural Opportunity Funds (QROFs) must also satisfy a 90% asset test — but with a geographic overlay. All 90% of qualifying assets held by a QROF must be located entirely within rural-designated OZ census tracts, not merely within any QOZ. This is a stricter geographic concentration requirement than applies to standard QOFs, and it will require careful asset tracking for managers operating or considering QROF structures.

The substantial improvement threshold has also changed for rural investments. Under OZ 1.0, any used tangible property acquired for QOZ purposes had to be 'substantially improved' — meaning the fund or QOZB had to increase the property's basis by 100% within a 30-month window. Under OZ 2.0, property located in a designated rural area qualifies with only a 50% basis increase. The IRS clarified in Notice 2025-50 that this lower threshold applies retroactively to OZ 1.0 rural designations currently in the improvement process, though some implementation questions remain open pending further guidance.

The Working Capital Safe Harbor:

A Critical Compliance Overlap

The Working Capital Safe Harbor (WCSH) has been the primary mechanism allowing QOZBs to hold cash while deploying capital without tripping the NQFP limit. The standard WCSH allows a QOZB to hold cash, cash equivalents, and debt instruments for up to 31 months — provided it has a written plan and schedule for the deployment of those funds into qualifying business property. A 62-month safe harbor is available for projects involving government-approved written development plans.

For many QOZBs funded in 2020 and 2021, those windows have now closed. Cash or near-cash assets held in excess of what is 'reasonable' for ordinary business operations counts toward the 5% NQFP limit. Exceeding that limit at the QOZB level flows upward: a QOZB that fails its own compliance standards is no longer a qualifying investment, which can in turn jeopardize the QOF's 90% asset test.

Managers should audit every QOZB's balance sheet now. Where working capital safe harbors have expired, the question becomes whether current cash holdings are defensible as ordinary business working capital — and what distributions or asset deployments may be necessary to restore compliance before the June 30 or December 31 measurement dates.

New Reporting Requirements Change the Compliance Burden

Prior to the OBBBA, QOFs were required to file Form 8996 (Qualified Opportunity Fund) annually, certifying compliance with the 90% test and reporting the amount of any penalty owed. QOZBs had no independent reporting obligations — their compliance data flowed upward through the QOF's return or investor K-1s.

That has changed. Under new Code Section 6039K, QOFs must now file detailed annual information returns that go well beyond the old Form 8996. Required disclosures include:

• Total asset values and the breakdown of qualifying versus non-qualifying assets.

• The NAICS code for each QOZB in which the fund holds an interest.

• The approximate number of residential units for any real property held by a QOZB.

• The approximate average monthly number of full-time equivalent employees.

• Investment amounts allocated to each QOZB.

• Geographic location information tied to census tract designations.

Under §6039L, QOZBs are now independently required to furnish written statements to their QOF investors containing the data needed for §6039K compliance — a new obligation that many smaller operating businesses will need to build systems to satisfy. This is particularly significant for QOZBs structured as corporations, which previously provided no passthrough information to their QOF owners at all.

These requirements are effective for tax years beginning after July 4, 2025. For calendar-year funds, the 2026 tax return — filed in 2027 — is the first return subject to the full new regime. The penalties for non-compliance are meaningful: $500 per day, up to $10,000 per return for standard funds; up to $50,000 for funds with gross assets exceeding $10 million. Intentional non-compliance escalates to $2,500 per day with a $250,000 maximum for large funds.

Practical Implications for Fund Managers

The 90% asset test has always required ongoing monitoring — but under OZ 2.0, the data infrastructure needed to support that monitoring is significantly more extensive. Managers can no longer rely on end-of-year spreadsheet reviews of fund-level assets. They need systems that track asset values continuously, flag approaching violations before measurement dates, and pull required disclosure data from QOZBs on a consistent schedule.

The dual-period compliance reality compounds this. A fund with OZ 1.0 investors (pre-2027) and OZ 2.0 investors (post-2026) may be tracking compliance under both rule sets simultaneously, with different applicable standards for different tranches of capital. The §6039L requirement means that fund managers now need to coordinate compliance data not just internally, but upstream from the QOZBs in which they invest — many of which are independent operating companies with no prior experience with OZ reporting obligations.

Managers who have relied on informal compliance practices — periodic check-ins with outside counsel, year-end reconciliations by hand, or ad hoc valuation requests — are not equipped for what the new regime demands. The shift from voluntary to statutory reporting, with real financial penalties attached, changes the risk calculus for everyone in the QOF ecosystem.

The Bottom Line

The 90% asset test was always the most operationally demanding requirement in QOF compliance. Under OZ 2.0, the data required to document and report compliance has expanded materially. Managers who treat this as a year-end tax issue rather than a year-round operational discipline will find themselves exposed — to penalties, to investor disputes, and to the regulatory scrutiny that the new §6039K reporting framework is specifically designed to enable.

OZX automates 90% asset test tracking with live monitoring across both measurement dates, working capital safe harbor flags, and QOZB-level data aggregation for §6039K reporting. Learn more at ozxpro.com.