This article is educational and is not legal or tax advice. Opportunity Zone qualification, working capital planning and depreciation outcomes depend on your fund and project documents — confirm every position with the fund's tax advisor before relying on it.
There is a widely repeated claim that Opportunity Zone designations are about to disappear and existing investments are at risk. It is wrong, and believing it will send a sponsor after the wrong deadline. The 2018-designated tracts run through December 31, 2028, existing positions are protected well past that, and the ten-year election survives designation expiry entirely — so the cost segregation and depreciation planning inside a current project is not in jeopardy.
What is real is narrower and much closer. On December 31, 2026 — sixteen weeks out — a fund generally loses the ability to place new property acquisitions into a tract that is not re-designated for the 2027 round. Two exceptions survive, both of which have to be built before year-end, and one of them turns on documentation your cost segregation and basis work already touches.
Two clocks, and only one of them is urgent
The confusion comes from treating one date as if it were the other. There are two separate clocks:
- The designation clock. Tracts designated in 2018 remain designated until December 31, 2028 (Puerto Rico: December 31, 2027). OBBBA's rewrite of §1400Z-1(f) applies only to areas designated after enactment, so pre-enactment tracts stay on prior law. There is no de-designation. The 2027 round is a separate, new designation, not a replacement map that removes anyone.
- The acquisition clock. OBBBA §70421(c)(4)(A) replaced the fixed date in §1400Z-2(d)(2)(D)(i)(I) with "the applicable start date" — and a previously designated zone has no applicable start date. Notice 2026-40 §5.01(1) states the consequence directly: property acquired by a QOF or QOZB after December 31, 2026 cannot be qualified opportunity zone business property unless it is acquired for use in a zone designated after July 4, 2025, or an exception applies.
So the question for a sponsor is not "will my zone survive." It is: am I still buying property after this year, and will my tract be in the 2027 round? If the tract is re-designated, new acquisitions qualify normally from January 1, 2027. If it is not, you are down to two exceptions.
Nobody can tell you yet whether your tract makes it
Governors had until September 28, 2026 to nominate, with an automatic thirty-day extension available on request and a hard stop at October 28, 2026. Treasury then has thirty days, extendable, with designations effective January 1, 2027.
As of early September 2026 roughly ten to eleven jurisdictions had actually filed nominations with Treasury, while a larger number had opened a public process without filing. No jurisdiction has been approved — and none legally can be until the nomination window closes. Treat any list circulating today as a forecast.
The arithmetic is not comforting for incumbents. The eligible universe is 25,332 low-income communities, against a projected national total of roughly 6,544 designations — a reduction of about a quarter, and in the fifty states and DC closer to a fifth. Currently designated tracts compete against every other eligible tract for those slots, and at least one governor-facing planning guide recommends re-selecting only 40–50% of current high-performing zones while dedicating the rest to fresh areas. A current Opportunity Zone does not automatically become a new one. Plan for the possibility that yours does not, because you will not know in time to start over.
Exception one: the working capital safe harbor plan, adopted this year
Notice 2026-40 §5.01(2) preserves qualification for property acquired after 2026 where a working capital safe harbor plan was already in motion. All four conditions must be met:
- A written working capital plan adopted on or before December 31, 2026.
- Acquisitions substantially consistent with that plan.
- The QOZB has received at least 10% of its total estimated working capital by December 31, 2026.
- The QOZB has expended at least 5% by that date — and amounts under a binding agreement entered before January 1, 2027 count as expended.
The same section extends comparable relief to new QOF equity issued after 2026 under such a plan, which matters for sponsors still raising. Because the working capital safe harbor runs on a 31-month clock, a plan adopted this year gives practical runway into roughly mid-2029.
This is the single most actionable item in this article. A written plan, funded to 10% and spent to 5% before year-end, is the difference between a project that can keep buying and one that cannot. It is also entirely within a sponsor's control right now.
Exception two: replacement and modernization, but never expansion
Notice 2026-40 §5.01(3) preserves qualification for "the replacement or modernization of property necessary to continue the operations of the trade or business." The exclusion is stated just as plainly: it does not cover "the expansion of a trade or business or the transition of a trade or business into a new trade or business."
The Notice's own examples draw the line usefully. Buying an adjacent warehouse in 2028 to add capacity for a new product line fails. Replacing windows, appliances, fixtures, cabinetry and flooring on apartment unit turns in 2028 and 2029 passes. A 2028 restaurant kitchen renovation with new ventilation and a new point-of-sale system passes.
Note what the passing examples have in common: they are exactly the short-life components a cost segregation study identifies. Appliances, cabinetry, flooring, specialty ventilation and point-of-sale equipment are 5-year personal property, not building shell. A sponsor operating under this exception is, in practice, buying the category of asset that carries the fastest depreciation — which is worth modeling deliberately rather than discovering afterward.
Where the cost segregation allocation does real work for a sponsor
Two places, and both are ordinary parts of a study rather than add-ons.
The substantial improvement test. Under §1400Z-2(d)(2)(D)(ii), additions to basis must exceed the property's adjusted basis over a 30-month period. The denominator excludes land — so the land-versus-building allocation determines the number you have to beat, and a smaller building basis is a lower bar. That allocation is the same one a cost segregation study already produces, which is why the two engagements belong together rather than in sequence. There is one important change here: OBBBA §70421(c)(4)(C) cut the rural threshold from 100% to 50%, effective on enactment July 4, 2025, and it reaches existing 2018 tracts — 3,309 of the 8,764 current zones are entirely rural. The condition that must travel with that claim: the entire zone must be rural, not merely the parcel.
The depreciation schedule during the hold. A cost segregation study separates the building into 5-, 7- and 15-year components and the long-life shell, so short-life property depreciates quickly rather than over decades. Qualifying property can be expensed under §168(k) — 100% and permanent for property acquired after January 19, 2025, with earlier acquisitions on the TCJA phase-down, and Notice 2026-11 tying that acquired-date test to the written binding contract date rather than closing.
At exit the conditions matter more than the headline. After a ten-year hold, and only where the §1400Z-2(c) fair market value election is actually made, gain on a sale of the QOF interest is excluded to the extent the election applies, including gain attributable to depreciation taken during the hold. Before year ten, or without the election, recapture is entirely normal — §1245 ordinary recapture on personal property, and §1250 treatment on the building and its land improvements. Selling the interest and the fund selling assets are also different transactions; we work that through in the asset-sale exclusion article, and the broader interaction sits on our Opportunity Zone cost segregation page.
What survives regardless of the map
For a sponsor with capital already deployed, the protections are substantial and worth stating so the December date does not cause the wrong reaction:
- The ten-year election survives designation expiry. Notice 2026-40 §5.02(1), citing Treas. Reg. §1.1400Z2(c)-1(c), provides the election is not impaired solely because a zone's designation ceases to be in effect — for dispositions before January 1, 2048.
- The substantial-use requirement is safe-harbored to December 31, 2047 (§5.02(2)).
- The QOZB 50% gross-income and intangibles requirements are safe-harbored to the same date (§5.02(3)), conditioned on the business having begun active conduct in the tract before expiry, or reasonably anticipating doing so under a qualifying plan.
- Substantial improvement already underway is unaffected. The 30-month clock runs on its own terms.
One honest caveat: the 90% asset test and the 70% tangible property test are not separately safe-harbored in the Notice. The better reading is that they do not need to be, because they operate on qualified opportunity zone business property and QOZB status, both of which the Notice preserves. Several firm alerts flag the same gap without resolving it, and the proposed regulations the Notice promises do not yet exist — every safe harbor described here is announced intent rather than a final rule.
Frequently Asked Questions
Does my Opportunity Zone investment lose its depreciation and exclusion benefits if the tract is not re-designated?
No. Existing designations run through December 31, 2028, and Notice 2026-40 §5.02 preserves the substantial-use and QOZB requirements to December 31, 2047, with the §1400Z-2(c) ten-year election expressly unimpaired by designation expiry for dispositions before January 1, 2048. What is lost is the ability to place new property acquisitions after December 31, 2026, absent an exception.
What exactly must be done before December 31, 2026 to keep acquiring property?
Adopt a written working capital safe harbor plan by that date, make acquisitions substantially consistent with it, have the QOZB receive at least 10% of total estimated working capital and expend at least 5% by year-end — with amounts under a binding agreement entered before January 1, 2027 counting as expended. All four conditions must be met.
How does a cost segregation study affect the substantial improvement test?
The test measures additions to basis against the property's adjusted basis excluding land, so the land-versus-building allocation sets the threshold you have to exceed. A cost segregation study produces that allocation as part of its ordinary work, and for a zone comprised entirely of a rural area the threshold is 50% rather than 100% of adjusted basis.
Can we still take bonus depreciation on property acquired under the replacement exception?
Yes, if the property meets the §168(k) requirements. Bonus is 100% and permanent for qualified property acquired after January 19, 2025, and follows the TCJA phase-down for earlier acquisitions, with Notice 2026-11 treating the acquired-date test as turning on the written binding contract date. The replacement and modernization exception is about Opportunity Zone qualification, and it does not by itself change depreciation eligibility.
Is renovating apartment units after 2026 an expansion or a replacement?
The Notice's example treats replacing windows, appliances, fixtures, cabinetry and flooring on unit turns as qualifying replacement or modernization. Buying an adjacent building to add capacity is treated as expansion and does not qualify. How far the exception tolerates partial-expansion facts is not addressed and remains open.
When will we know whether our tract made the 2027 map?
Nominations closed September 28, 2026 with an automatic thirty-day extension available on request and a hard stop of October 28, 2026; Treasury then has thirty days, extendable, with designations effective January 1, 2027. No jurisdiction had been approved as of early September 2026, and none legally could be before the window closed.
Still deploying capital in a 2018-designated zone? Start with a free estimate so the land-versus-building allocation and the depreciation schedule are settled while the working capital plan is being written.
Where a project also needs the property or a fund interest valued, Ellaval is ClickDrag Finance’s preferred vendor for valuation services — the entity to approach for fair market value valuations prepared for tax purposes, including estate and gift planning, impact fund investments and Opportunity Zone deals, working with CPAs and high-net-worth individuals. Reach Howard Krieger at howard@ellavoz.com.
