This article is educational and is not legal or tax advice. Opportunity Zone rules are technical, time-sensitive, and change with each new Treasury pronouncement — confirm any position with your tax advisor before you act.
The Program Is Permanent — but the Map Is Not
The 2025 One Big Beautiful Bill Act (OBBBA) did two things that matter to anyone deploying capital in an Opportunity Zone — and neither of them changes how a cost segregation study works on a property you already own. First, it made the program permanent. Second — and this is the part moving fast right now — it replaced the one-time 2018 map with a decennial redesignation: a fresh set of zones every ten years, chosen by governors from a Treasury-published list of eligible tracts.
The first redesignation is being decided now. If you sponsor OZ deals, run an Impact Fund, or advise investors who do, the tract you are counting on may not be a zone in the next round — and a tract that is not a zone today may become one. That uncertainty does not reach the depreciation side: a cost segregation study on a building you already own is unaffected by what happens to the map, because existing designations and the positions built under them are protected. What the map decides is where you can put new money.
Status as of September 10, 2026. Roughly ten to eleven jurisdictions have filed nominations with Treasury; a larger number have opened a public process without filing. No jurisdiction has been approved, and none legally can be until the nomination window closes — Rev. Proc. 2026-14 deems early submissions received no earlier than the close of the 90-day window. Treat any list circulating today as a forecast, and re-check this before relying on it.
What Treasury Actually Published
In spring 2026, the Treasury Department and the IRS released Revenue Procedure 2026-14, the operational rulebook for the redesignation. Its headline numbers:
- 25,332 eligible census tracts were identified nationwide — the universe from which the new zones will be chosen.
- Each governor may nominate up to 25% of the eligible tracts in their state.
- Treasury is expected to approve the new designations by the end of 2026, with the zones taking effect January 1, 2027.
Governors may nominate up to 25 percent of the low-income community census tracts in the state that are eligible for designation as Qualified Opportunity Zones. — Framework of the OZ 2.0 nomination process under Rev. Proc. 2026-14
The Deadline That Is Actually Close
The nomination clock is a 90-day window that opened July 1, 2026. That puts the base deadline at roughly September 28, 2026, with a 30-day extension available on request — an outer limit near October 28, 2026. States are already moving: several governors’ offices opened public nomination portals within days of the window opening, inviting local governments, developers, and community organizations to submit tracts for consideration.
Translation for sponsors and Impact Funds: the case for including — or keeping — a tract on the new map is being made in your state right now. If a corridor central to your pipeline is at risk of falling off, the time to document its case to your state OZ office is this quarter.
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Why Some of Today’s Tracts Will Not Carry Forward
The redesignation is not a simple re-stamp of the old map. OBBBA tightened the eligibility criteria, which means some currently-designated tracts will not qualify for the new round:
- The income bar dropped. A qualifying “low-income community” now generally needs median family income at or below 70% of the area or statewide median — down from 80% under the original program — or a poverty rate of at least 20% with median family income at or below 125% of the area median.
- The contiguous-tract rule is gone. The original program let governors designate certain tracts adjacent to low-income communities even if the adjacent tract did not itself qualify. OBBBA repealed that provision. Deals sited in those “contiguous” tracts should not assume the location carries forward.
The practical effect is a smaller, more sharply targeted map. For an Impact Fund whose thesis rests on a specific set of neighborhoods, that is both a risk (a tract you rely on drops off) and an opportunity (a genuinely distressed tract you have been eyeing finally qualifies). Either way, you cannot manage it without checking the new eligibility list against your pipeline.
The Timing Fork Every Deal Now Faces
Because the new zones do not take effect until January 1, 2027, there is a transition window that changes how you sequence a deal:
- Investments made on or before December 31, 2026 generally rely on the existing (“OZ 1.0”) map and rules that remain in force through year-end.
- Investments made on or after January 1, 2027 look to the new OZ 2.0 designations — with the rolling five-year deferral, the enhanced rural benefits, and the new reporting regime that came with them.
For a property sited in a tract that is designated today and expected to survive the redesignation, the calendar is a genuine strategic lever. For a property in a tract that may not carry forward, the answer is different again. This is exactly the kind of question to put to your tax advisor before you sign — the wrong month can change which regime governs the entire hold.
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A Practical Checklist While the Window Is Open
- Map your pipeline against the eligible-tract list. Confirm which of your target sites appear on the Rev. Proc. 2026-14 eligible universe — and which currently-designated sites are not on it.
- Engage your state OZ office. Governors are choosing from a much larger eligible pool than they can designate. A documented case — jobs, housing units, community benefit — for a tract you care about can influence whether it makes the 25%.
- Decide the timing of any near-term deployment with your advisor, knowing the OZ 1.0/2.0 fork lands on December 31, 2026.
- Line up the depreciation side early. Whatever zone you land in, the economics of the hold turn on how much of your basis is short-life property — and inside an OZ, that acceleration is uniquely durable.
Where Cost Segregation Fits
The redesignation decides where you can put new money. A cost segregation study decides how efficient the investment is once you do. 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 the gain attributable to depreciation accelerated during the hold, which can turn cost segregation from a timing benefit into a permanent one. Before year ten, or with no election made, recapture behaves entirely normally: §1245 ordinary recapture on personal property and §1250 treatment on the building. Selling the QOF interest and the fund selling its assets are also different transactions — see the asset-sale exclusion article.
On value-add deals the same component-level analysis that supports your depreciation schedule also supports the land-versus-building allocation behind the substantial-improvement test — and for a zone comprised entirely of a rural area, that threshold is now 50% of adjusted basis rather than 100%, a change effective on enactment July 4, 2025 that reaches existing 2018 tracts. We covered the pairing in depth in Cost Segregation + Opportunity Zones 2.0, and the full interaction is on our Opportunity Zone cost segregation page.
What is actually at risk — and what is not
The phrase "some of today's zones will disappear" is easy to over-read, so be precise about what the redesignation reaches. Tracts designated in 2018 remain designated through December 31, 2028 (Puerto Rico: December 31, 2027), and there is no de-designation — the 2027 round is a separate, new designation rather than a replacement map that removes anyone. Existing positions carry substantial protection well beyond that, and Notice 2026-40 §5.02(1) provides that the §1400Z-2(c) election is not impaired solely because a zone's designation ceases to be in effect, for dispositions before January 1, 2048.
What does change, and much sooner: property acquired by a QOF or QOZB after December 31, 2026 generally cannot be qualified opportunity zone business property unless it is acquired for use in a zone designated after July 4, 2025, or one of two exceptions applies — a working capital safe harbor plan adopted by year-end 2026 with funding and spending thresholds met, or ordinary-course replacement and modernization property. That is the deadline sponsors should be working to, and we set it out in what to do if your zone does not make the 2027 map.
Frequently Asked Questions
If my tract is not re-designated, do I lose my depreciation and Opportunity Zone exclusion benefits?
No. Tracts designated in 2018 run through December 31, 2028, there is no de-designation, and Notice 2026-40 §5.02 preserves the substantial-use and QOZB requirements to December 31, 2047, with the 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.
Does the redesignation affect a cost segregation study on a building I already own?
No. A cost segregation study allocates the depreciable basis of property you already hold into 5-, 7-, 15-year and long-life components, and the resulting depreciation schedule does not depend on whether the tract appears on a future map. The map governs where new capital can be deployed.
When does the new Opportunity Zone map take effect?
Designations made in this round are effective January 1, 2027 and run through December 31, 2036. Governors nominate from the eligible list, with a base 90-day window and an automatic thirty-day extension available on request; Treasury then has thirty days, extendable, to act.
How many of today's zones are expected to carry forward?
No published estimate exists for how many currently designated tracts will be renominated. The eligible universe is 25,332 tracts against a projected national total of roughly 6,544 designations, and currently designated tracts compete against every other eligible tract for those slots. A current Opportunity Zone does not automatically become a new one.
Does the rural substantial-improvement change affect my cost segregation allocation?
It can. The reduction of the substantial-improvement threshold from 100% to 50% of adjusted basis took effect on enactment, July 4, 2025, and reaches existing 2018-designated tracts. The condition is that the entire zone must be comprised of a rural area, not merely the parcel, and the land-versus-building allocation from a cost segregation study sets the basis the additions must exceed.
Should I wait for the final map before committing to a deal?
Waiting forfeits the only window in which the map can be influenced, and it does not remove the December 31, 2026 acquisition deadline for tracts that may not carry forward. Sequencing decisions of this kind belong with your tax advisor, against your specific tract and timeline.
The Bottom Line
Opportunity Zones are permanent, but the specific zones are not — and the first redesignation is being decided this quarter. Treasury has named the eligible tracts, governors have until late September (or late October with an extension) to nominate, and the new map governs everything from January 1, 2027. Sponsors and Impact Funds that wait for the final map to be published will have missed the only window in which they could shape it. Check your pipeline against the eligible list now, make your case to your state, and coordinate the timing and the tax positions with your advisor.
Underwriting an OZ deal? Estimate the depreciation side on our free calculator, then start your cost segregation study once the property is under contract.
