The 90 percent asset test for Qualified Opportunity Funds

A Qualified Opportunity Fund (QOF) must hold at least 90 percent of its assets in Opportunity Zone property, measured as the average of two snapshots a year: the last day of the first 6 months of its tax year and the last day of the tax year. As of October 2026, those rules come from the statute and the 2020 final regulations, and the 2025 law did not rewrite them.

Threshold

90% average

Test dates

Month 6 and year end

New-cash grace

6 months

Reinvestment window

12 months

This page uses "OZ 1.0" for investments made through December 31, 2026 and "OZ 2.0" for investments made after that date. The 90 percent test applies to the fund in both regimes.

The rule in the statute

A QOF is a corporation or partnership organized to invest in Opportunity Zone property, other than another QOF (26 U.S.C. 1400Z-2(d)(1)). Opportunity Zone property means QOZ stock, a QOZ partnership interest, or QOZ business property held directly (section 1400Z-2(d)(2)(A)).

The fund passes if the average of its Opportunity Zone property percentage on the two test dates is at least 90 percent (26 CFR 1.1400Z2(a)-1(b)(4)). For a calendar-year fund, the test dates are June 30 and December 31.

Averaging matters. A fund can be below 90 percent on one date and still pass if the other date makes up the difference. A fund at 80 percent on June 30 needs 100 percent on December 31 to average 90.

How assets are valued

A fund values its assets under one of two methods and must apply the same method to all assets for the whole tax year (26 CFR 1.1400Z2(d)-1(b)(2)(i)(A)):

• Applicable financial statement method. Each asset is valued as reported on the fund's applicable financial statement. Leased assets can be valued this way only if the statement is prepared under U.S. GAAP and assigns the lease a value.
• Alternative valuation method. Property bought or built for fair market value is valued at its unadjusted cost basis. Leased property is valued at the present value of the lease payments, fixed when the lease is signed and used for every test date during the lease.

The Form 8996 instructions (Rev. December 2024) describe both methods, and Part VI line 4 of the form asks which one the fund used.

A fund that owns QOZ stock or partnership interests has an optional safe harbor for counting that equity. It may treat the equity as qualifying on a test date if the business was a qualified opportunity zone business (QOZB) for at least 90 percent of the fund's holding period, measured through the end of the business's most recent tax year ending on or before the test date (1.1400Z2(d)-1(b)(2)(i)(C)). That 90 percent holding-period requirement for QOZ stock and partnership interests comes from the statute itself.

The first-year rule

A fund names its first QOF month on Form 8996 Part I, line 4. If it does not name one, the certification is treated as taking effect in the first month of the tax year (1.1400Z2(d)-1(a)(2)(iii)(A)).

When a fund becomes a QOF partway through its first year, the "first 6-month period" means the first six months in which it is a QOF. If it becomes a QOF in the seventh month or later of a 12-month year, only the year-end test counts (1.1400Z2(d)-1(a)(2)(iv)(A)). Months before the first QOF month are left out of any penalty (1.1400Z2(d)-1(a)(2)(iv)(B)).

The Form 8996 instructions give two examples. A calendar-year partnership that picks April as its first month has its first test on September 30. One that picks July has only the December 31 test, leaves lines 7 through 9 blank, and enters line 13 directly on line 14 instead of dividing by 2.

The 6-month rule for new capital

Investor money rarely goes to work on the day it arrives. The regulations let a fund leave recently contributed property out of both the numerator and the denominator of a test if all three conditions hold (1.1400Z2(d)-1(b)(2)(i)(B)):

1. The property came in as a contribution to a partnership fund, or solely in exchange for stock of a corporate fund.
2. The contribution was made no more than 6 months before the test date.
3. From the fifth business day after the contribution through the test date, the amount was held continuously in cash, cash equivalents, or debt instruments with a term of 18 months or less.

The fund may use this option on one test and not the next. It does not have to be consistent. If a fund excludes property on a test date, the Form 8996 instructions say not to include that property in the penalty calculation for the months it was excluded.

The 12-month reinvestment rule

When a fund receives proceeds from a return of capital, or from selling Opportunity Zone property, the proceeds count as qualifying property for the test if the fund reinvests them in Opportunity Zone property within 12 months. Until reinvested, the money must stay in cash, cash equivalents, or debt with a term of 18 months or less (26 CFR 1.1400Z2(f)-1(b)(1)).

Two extensions exist in the same regulation:

• Government action. A delay caused by waiting on government action, where the application is complete, does not cause a failure of the 12-month requirement.
• Federally declared disaster. If a disaster delays the reinvestment plan, the fund may get up to 12 more months, provided it reinvests the proceeds as originally intended (1.1400Z2(f)-1(b)(2)).

This is a fund-level rule. It does not change an investor's own 180-day window, which is covered on the 180-day rule page.

When a business, not the fund, causes the failure

Most funds hold interests in operating businesses rather than property directly. If a QOZB causes the fund to fail on a test date, the fund may still count that interest as qualifying for that date if the business corrects the failure within 6 months. Each fund gets one such correction per business (1.1400Z2(d)-1(d)(6)).

If the failure happens on the last test date of the year, the cure is available only if the fund files a valid extension for its tax return. If the business still fails after the cure period, the fund owes the penalty for each month of failure, starting with the month after the last month it met the standard. The business-level tests, including the 70 percent tangible property standard, are on the QOZB requirements page.

The penalty formula

A fund that fails pays a penalty for each month it fails. The monthly amount is the excess of 90 percent of its aggregate assets over its Opportunity Zone property, multiplied by the underpayment rate under section 6621(a)(2) for that month (section 1400Z-2(f)(1); 1.1400Z2(f)-1(a)).

• Reasonable cause. No penalty applies if the failure is due to reasonable cause (section 1400Z-2(f)(3)). The Form 8996 instructions say the IRS will send a notice that explains the penalty, the reasonable cause relief process, and payment.
• Partnerships. For a partnership fund, the penalty is taken into account by each partner in proportion to its distributive share (section 1400Z-2(f)(2)).

Form 8996 Part IV computes the penalty month by month. Line 1 is total assets on the last day of the month, line 2 multiplies by 0.90, line 3 is Opportunity Zone property, and line 4 is the shortfall (zero if negative). Line 5 is the underpayment rate, which the IRS publishes each quarter. Line 6 multiplies the shortfall by the rate, and line 7 divides by 12 and rounds up to two decimal places.

What OZ 2.0 adds

The 2025 law (Public Law 119-21, sec. 70421) left the 90 percent test in place and added two things that depend on it:

• Reporting. New section 6039K requires every QOF to file an annual return showing the value of its total assets and of its Opportunity Zone property on each semiannual test date. The filing and penalty rules are on the reporting penalties page.
• Rural funds. A Qualified Rural Opportunity Fund must hold at least 90 percent of its assets in Opportunity Zone property in zones made up entirely of rural areas, measured under rules similar to the semiannual test. That status matters for the 30 percent basis increase, which applies only to amounts invested after December 31, 2026. As of October 2026, no guidance explains how a rural fund that misses one test is treated. See rural Opportunity Zones.

The 1400Z-2 regulations on eCFR, current as of October 29, 2026, have not yet been amended for the 2025 law. The test mechanics above are unchanged by it, but other parts of those regulations still refer to the old December 31, 2026 dates.

Checklist for each test date

1. Confirm the date. Month 6 and year end of the fund's tax year, or only year end if the fund started in month 7 or later of its first year.
2. Use one valuation method. The same method for every asset for the whole year.
3. Identify new contributions. Money received within 6 months and held in cash or short-term debt since the fifth business day may be left out of both sides.
4. Track sale and return-of-capital proceeds. Note the 12-month reinvestment deadline for each receipt and any disaster or government-action delay.
5. Get each business's numbers. Each QOZB's tangible property by census tract feeds Form 8996 Part VI, and a failing business has one 6-month cure.
6. Compute, round and average. Two decimals per test, then the average on line 14. Below 0.90 means Part IV.

The fund's tax adviser applies these rules to its facts. For the form that reports the result, see Form 8996.