Gain invested in a Qualified Opportunity Fund by December 31, 2026 keeps the original rules and is recognized at the earlier of an inclusion event or that date; gain invested later gets a rolling five-year deferral and a 10% basis step-up at five years (30% for a Qualified Rural Opportunity Fund). Cost segregation depreciation is the same under both regimes.
Did OBBBA Simply Extend Opportunity Zones?
The 2025 One Big Beautiful Bill Act (OBBBA) did not simply extend Opportunity Zones — it rewrote the deferral mechanics and layered a new regime on top of the old one. For real-estate fund CPAs, the headache is that both regimes are live at the same time, and the fund’s depreciation position — whether a cost segregation study was run, and in which year — has to be mapped alongside them rather than after them. Whether a given investor receives the original benefits or the new OZ 2.0 benefits turns on a single hinge date: January 1, 2027. Get the hinge right and the schedules follow; get it wrong and you have modeled the wrong deferral, the wrong step-up, and the wrong exit.
What Actually Changed in the Mechanics
Strip away the map redesignation being decided for 2027 and three structural changes drive the numbers. None of the three changes how cost segregation works inside the fund, but each one changes when the resulting deductions and the eventual exclusion land on a particular investor’s return:
- For amounts invested after December 31, 2026, the fixed gain-recognition date is gone. Under the original program, every deferred gain became taxable on the same day — December 31, 2026 — no matter when it was invested. For amounts invested after December 31, 2026, OBBBA replaced that with a rolling five-year deferral: deferred gain is recognized on the earlier of an inclusion event or five years after the investment is made. For those new investments, the clock starts when the investor invests.
- For amounts invested after December 31, 2026, the seven-year step-up is eliminated. The old 5%-at-seven-years bump is gone. For amounts invested after December 31, 2026, the standard step-up is a flat 10% at five years (30% for a Qualified Rural Opportunity Fund).
- A reporting regime arrived. OZ 2.0 adds information-reporting and transparency requirements that the original program largely lacked — fund-level and, in time, investor-level data that funds and their preparers will be responsible for capturing from day one.
Deferred gain from amounts invested in a Qualified Opportunity Fund after December 31, 2026 is recognized on the earlier of an inclusion event or the date five years after the investment, while gain deferred under the original program keeps its legacy timing: the earlier of an inclusion event or December 31, 2026. — ClickDrag Finance, summarizing IRC §1400Z-2(b)(1), Pub. L. 119-21 §70421(c)(2) and (c)(5)(A), and Treas. Reg. §1.1400Z2(b)-1(c)
What changes for Opportunity Zone investments after December 31, 2026?
Only investments made after December 31, 2026 get the rolling five-year deferral: OBBBA §70421(c)(5)(A) limits the amended §1400Z-2(b)(1)(B) recognition rule to amounts invested in a Qualified Opportunity Fund after that date, so money already in a QOF under the original program keeps the legacy recognition timing rather than picking up a fresh five-year clock. How that clock lines up with the depreciation on one investment is set out in Opportunity Zone investment in 2027: the cost segregation and recapture timeline.
Here is the transitional map in its simplest form:
- Gains invested on or before December 31, 2026 generally look to the pre-OBBBA benefit structure that remains in force through year-end — including the legacy recognition timing for those investments.
- Gains invested on or after January 1, 2027 look to the OZ 2.0 benefit structure: a rolling five-year deferral and the enhanced rural step-up.
That single fork means a fund closing capital across the new year may be placing investors into two different regimes, with two different deferral clocks, inside the same fund. The K-1s, the deferral tracking, and the eventual inclusion-event modeling all branch on the investment date. The zone map does not: which map a property is tested under turns on when the fund or its business acquires the property, as the checklist below sets out.
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What This Means for the Workpapers
Practical consequences a fund CPA should be building for now:
- Track the investment date per investor, not per fund. With a rolling five-year clock, each investor’s recognition date is personal. A single fund-level date no longer works.
- Confirm the zone under the right map. Which map governs a property turns on when the QOF or its business acquires it, not on when the investor’s money went in (Notice 2026-40, section 5.01): property acquired on or before December 31, 2026 in a 2018 tract is tested under that designation, which runs through December 31, 2028 (Puerto Rico: December 31, 2027) under Rev. Proc. 2026-14, section 2.02(2)(c), and property acquired after December 31, 2026 generally qualifies only if it is acquired for use in a zone designated after July 4, 2025, unless an exception in section 5.01(2) or (3) applies (which map governs a deal closing around January 1, 2027). The same parcel can be in a zone under one map and out under the other (what sponsors face when a tract does not make the 2027 map).
- Stand up reporting capture from inception. The new information-reporting obligations are far easier to satisfy if the data is collected as investments are made than reconstructed at filing.
- Model the exit, including recapture — or its absence. After a ten-year hold, and only where the §1400Z-2(c) fair market value election is actually made, gain on the sale of the QOF interest is excluded to the extent the election applies — including the gain attributable to depreciation accelerated during the hold. Whether a fund ran a cost segregation study materially changes both the interim deductions and the exit schedule.
Why Does the Depreciation Position Belong on the Same Workpaper?
Opportunity Zone planning and depreciation planning are usually handled by different people, but inside an OZ they are the same decision. During the hold, a cost segregation study pulls 5-, 7-, and 15-year property forward and — with 100% bonus depreciation under §168(k), which is permanent for qualified property acquired after January 19, 2025 and follows the TCJA phase-down for earlier acquisitions — expenses the qualifying portion immediately, sheltering operating income.
At exit, the arithmetic depends on three conditions that must all hold. After a ten-year hold, and only where the §1400Z-2(c) fair market value election is actually made, the basis of the QOF interest steps to fair market value, so gain on a sale of that interest — including the portion attributable to depreciation accelerated during the hold — is excluded to the extent the election applies. Before year ten, or with no election made, recapture behaves entirely normally: §1245 ordinary recapture on the reclassified 5- and 7-year property, §1250 ordinary recapture of depreciation taken above straight-line on the 15-year land improvements, and unrecaptured §1250 gain on the shell and land improvements, taxed at up to 25%.
The third condition is the one most often skipped on a workpaper: selling the QOF interest and the fund selling its assets are not the same transaction, and they do not produce the same answer. The §1400Z-2(c) election steps up the basis of the interest. An asset sale by the fund is governed by its own rules, and the analysis has to be run on the transaction actually contemplated — we work that distinction through in the asset-sale exclusion for 10-year LPs. A fund that skipped the study leaves interim deductions and cleaner exit schedules on the table either way; the mechanic itself is covered in Cost Segregation + Opportunity Zones 2.0 and on our Opportunity Zone cost segregation page.
After a ten-year hold and with the §1400Z-2(c) election made, the exclusion removes the gain that recapture would otherwise attach to on a sale of the QOF interest — which can turn what is ordinarily a timing benefit from cost segregation into a permanent one. Before year ten, or without the election, recapture is entirely normal. — ClickDrag Finance
The Bottom Line
For the balance of 2026 and into 2027, Opportunity Zone work is a two-regime exercise. For capital invested after December 31, 2026, OBBBA traded the fixed 2026 recognition date for a rolling five-year deferral and dropped the seven-year step-up, and it separately added fund reporting — so which set of rules an investor gets depends on whether the capital went in before or after January 1, 2027. Fund CPAs who map that hinge now, track investment dates per investor, and fold the depreciation position into the same workpaper will spend a far calmer filing season than those who discover the fork at year-end. Coordinate every election with the fund’s tax advisor before you rely on it.
Frequently Asked Questions
Does the Opportunity Zone 10-year election eliminate depreciation recapture?
After a ten-year hold, and only where the §1400Z-2(c) fair market value election is actually made, the basis of the QOF interest steps to fair market value, so gain on a sale of that interest is excluded to the extent the election applies — including the portion attributable to depreciation taken during the hold. Before year ten, or with no election made, recapture behaves entirely normally: §1245 ordinary recapture on reclassified personal property and unrecaptured §1250 gain on the building, taxed at up to 25%. Selling the interest and the fund selling its assets are also different transactions that must be analyzed separately.
Which investors actually get the rolling five-year deferral?
Only investments made after December 31, 2026. OBBBA §70421(c)(5)(A) limits the amended §1400Z-2(b)(1)(B) recognition rule to amounts invested in a Qualified Opportunity Fund after that date, so money already in a QOF under the original program keeps the legacy recognition timing rather than picking up a fresh five-year clock.
When should a fund run a cost segregation study inside an Opportunity Zone?
Ordinarily in the year the property is placed in service, so the reclassified 5-, 7- and 15-year property is on the first return rather than corrected later. Where a building has already been depreciating straight-line, a look-back cost segregation study claims the catch-up on Form 3115 under Rev. Proc. 2015-13 and section 6.01 of Rev. Proc. 2025-23, with no amended returns, for a building the fund placed in service in an earlier tax year and still owns — the study is still available, it simply arrives through a different mechanism.
Does 100% bonus depreciation apply to every OZ cost segregation study?
No, 100% bonus depreciation does not apply to every Opportunity Zone cost segregation study: under §168(k) as amended by OBBBA, it is permanent for qualified property acquired after January 19, 2025 when the statutory requirements are met; earlier acquisitions remain on the TCJA phase-down. IRS Notice 2026-11 treats the acquired-date test as turning on the date the written binding contract became binding rather than closing, so a fund's cost segregation schedule has to be matched to acquisition facts and not to the placed-in-service year alone.
Do the deferral clock and the depreciation workpaper track per fund or per investor?
The deferral clock tracks per investor, because each investor's recognition date depends on when that investor's capital went in. Depreciation from a cost segregation study is allocated at the entity level under the partnership rules, but whether a given partner can currently use it is tested at the partner level under §704(d), including debt basis under §752 — so both schedules end up investor-by-investor.
Advising an OZ fund on the depreciation side? Estimate the numbers on our free calculator, or start a component-level study built for full-life-cycle planning.
