This article is educational and is not legal or tax advice. Opportunity Zone inclusion, valuation and depreciation outcomes depend on your fund documents and your own facts — confirm every position with your tax advisor before relying on it.
On December 31, 2026, capital gains you deferred into a pre-2027 Qualified Opportunity Fund are recognized, whether or not anything was sold and whether or not any cash reached you. The size of that bill is not simply the gain you rolled in. It is capped by the fair market value of your QOF interest on that date — and if your fund has run a cost segregation study, the depreciation it produced is one of the few levers that can offset the income now landing on your return.
The uncomfortable part is the valuation itself. There is no statutory detail, no regulation, no safe harbor, no revenue ruling and no pending guidance project telling you how to value a Qualified Opportunity Fund interest for this purpose. That gap is why two investors in economically identical positions can report very different numbers this year, and why the cost segregation and depreciation side of the file has become the part of the analysis you can actually control.
How is the December 31, 2026 inclusion actually computed?
The rule is a lesser-of test. Under IRC §1400Z-2(b)(2)(A), the amount included is the excess of (i) the lesser of the gain originally deferred or the fair market value of the investment on the inclusion date, over (ii) your basis in that investment.
Two consequences follow immediately, and they cut in opposite directions:
- If your fund interest is worth less than the gain you deferred, the FMV governs and you include less than you rolled in. This is the entire reason valuation is suddenly a live question.
- If your fund interest has appreciated, the deferred gain governs. Appreciation above what you rolled in is never pulled into the 2026 inclusion.
Your basis depends on when you invested, and both vintage step-ups are closed classes rather than dead letters. Investments made on or before December 31, 2021 earned a 10% basis step-up at five years under §1400Z-2(b)(2)(B)(iii). Investments made on or before December 31, 2019 earned a further 5%, for 15% total, under §1400Z-2(b)(2)(B)(iv). Everything else starts at zero basis under §1400Z-2(b)(2)(B)(i).
A worked example, using a $2,000,000 long-term capital gain rolled into a QOF on June 15, 2019:
- Deferred gain: $2,000,000
- Held at least seven years at 12/31/2026, so a 15% step-up gives basis of $300,000
- Fair market value of the QOF interest at 12/31/2026: $1,750,000
- Lesser of $2,000,000 and $1,750,000 is $1,750,000, less $300,000 basis
- Gain included in 2026: $1,450,000, and basis afterward becomes $1,750,000
Change one input — an FMV of $2,400,000 instead — and the lesser-of test takes the $2,000,000 deferred gain, producing a $1,700,000 inclusion. The $400,000 of appreciation above the deferred gain is simply not part of this calculation.
What exactly is being valued, and why that opens the door to discounts
This is the point most investors get wrong. What is valued is your QOF equity interest — the partnership interest or the stock — not a pro-rata slice of the fund's buildings. Treas. Reg. §1.1400Z2(b)-1(e)(1)(ii) fixes the measurement date as the date of the inclusion event, which here is December 31, 2026.
That distinction matters because an interest in an illiquid, non-controlling, closely held fund is not worth the same as the underlying real estate divided by ownership percentage. Valuation practice under Rev. Rul. 59-60 has long recognized discounts for lack of marketability and lack of control, and nothing in the Opportunity Zone rules displaces that framework. No appraisal is legally required to file. As a practical matter, a position taken without one is a position taken without support.
What does not help: the alternative valuation methods that QOFs use for the 90% asset test — the applicable financial statement method and its alternative — are written for that test. They do not reach the §1400Z-2(b)(2)(A) inclusion computation.
The partnership rule that can erase your discount entirely
If you hold your QOF investment through a partnership or an S corporation, a different computation applies and it is the most under-reported item in this year's literature. Treas. Reg. §1.1400Z2(b)-1(e)(4) substitutes the lesser of (i) your percentage share of the remaining deferred gain less the vintage step-ups, or (ii) the gain that would be recognized on a fully taxable disposition of the interest at fair market value.
Prong (ii) is a hypothetical sale — which means partnership liabilities allocated to you under IRC §752 enter the amount realized. Opportunity Zone real estate commonly runs 50–70% financed, so this is not a corner case. Two illustrations of a $1,000,000 investment now worth $850,000 make the point: with $200,000 of loss allocations and no liabilities, the recognized amount is $850,000; with $200,000 of distributions and $3,000,000 of allocated liabilities, the recognized amount is the full $1,000,000. The decline in value stopped mattering.
There is a live trap inside this. Some sponsors are making debt-financed distributions to help investors fund the December tax bill. Under this regulation, the distribution that funds the tax can also increase the tax. If your fund is contemplating one, the modeling has to be done before the cash moves, not after.
Where cost segregation and depreciation fit on the deduction side
You cannot re-defer this gain. Notice 2026-40 §4.01(2) confirms the December 31, 2026 inclusion must be recognized and is not eligible for a fresh deferral. What you can do is meet it with deductions in the same year, and this is where a cost segregation study on a completed building inside the fund becomes a planning instrument rather than a compliance formality.
A cost segregation study separates a building's depreciable basis into its components and assigns each its own recovery period — 5-year personal property, 7-year property where the asset type supports it, 15-year land improvements, and the long-life shell at 27.5 or 39 years. Instead of one slow straight-line schedule, the short-life components depreciate quickly, and qualifying property can be expensed under §168(k). Bonus depreciation is 100% and permanent for qualified property acquired after January 19, 2025; earlier acquisitions remain on the TCJA phase-down, and IRS Notice 2026-11 treats that acquired-date test as turning on the written binding contract date rather than the closing date.
Two timing routes exist, and the second is the one most relevant this year. If the property is being placed in service now, the study belongs on the current return. If a building inside the fund has been depreciating straight-line for several years, a look-back cost segregation study claims the catch-up on Form 3115 under Rev. Proc. 2015-13 — no amended returns, and the entire cumulative adjustment lands in the year of change. That is a deduction arriving in the same year as an inclusion you cannot postpone.
One condition has to travel with this, because it is the part that gets dropped. Depreciation is only useful to you if you can currently deduct it. A qualifying QOF investment starts at zero basis under §1400Z-2(b)(2)(B)(i), and §704(d) limits deductible losses to basis — usually rescued by your share of partnership debt under §752, but "usually" is not "always." Our Opportunity Zone cost segregation page walks the interaction, and the arithmetic is set out in the zero-basis mechanics.
What the inclusion does not break
Two reassurances worth stating plainly, because the December date has produced a good deal of alarm that is not warranted.
The inclusion is not a disposition. Notice 2026-40 §4.01(3) confirms that recognizing the deferred gain does not terminate your qualifying investment, and the §1400Z-2(c) ten-year fair market value election survives it. Your ten-year clock keeps running.
Your zone is not expiring. The 2018-designated Opportunity Zones run through December 31, 2028 (Puerto Rico, December 31, 2027), and existing positions are protected well beyond that. What changes on December 31, 2026 is the ability of a fund to place new property acquisitions into a tract that is not re-designated for the 2027 round — a sponsor-side problem rather than an investor-side one, and one with two surviving exceptions.
The character of what you include is preserved. Treas. Reg. §1.1400Z2(a)-1(c)(1)(i) provides that the included gain carries the attributes it would have had absent deferral, including those taken into account by §§1(h), 1222, 1231(b) and 1256. If the gain you rolled in carried unrecaptured §1250 gain, the 25% rate follows it into 2026 — which is a reason to know what you rolled in, not merely how much.
Frequently Asked Questions
Can I defer the December 31, 2026 Opportunity Zone gain again?
No. Notice 2026-40 §4.01(2) states the deemed inclusion must be recognized and is not re-deferrable. Gains realized from other transactions can still be invested into an OZ 2.0 fund after January 1, 2027, but the 2026 inclusion itself cannot be rolled forward.
Does a cost segregation study reduce my 2026 inclusion?
Not the inclusion itself, which is fixed by the lesser-of computation in §1400Z-2(b)(2)(A). A cost segregation study creates depreciation deductions that may offset income in the same year, which is a different mechanism with the same practical effect on cash. Whether you can currently use those deductions depends on your basis under §704(d), including your share of partnership debt under §752.
Do I need an appraisal of my QOF interest?
No appraisal is legally required to file, and no safe harbor or ruling tells you how to value the interest. As a practical matter, the value is the number that sets the tax, so a valuation prepared for this purpose by a qualified third-party appraiser is the difference between a supported position and an asserted one.
Will depreciation recapture be triggered by the 2026 inclusion?
No. The inclusion recognizes the originally deferred gain and is not a disposition of the property, so it does not trigger §1245 or §1250 recapture on the fund's assets. Recapture becomes relevant at an actual exit, and after a ten-year hold with the §1400Z-2(c) election made, gain on a sale of the QOF interest is excluded to the extent the election applies.
Does the ten-year election survive the December inclusion?
Yes. Notice 2026-40 §4.01(3) confirms the inclusion is not a disposition and the qualifying investment continues, so the §1400Z-2(c) election remains available. For pre-2027 investments the election can be made for dispositions through December 31, 2047 under Treas. Reg. §1.1400Z2(c)-1(c).
Is a look-back cost segregation study still available this late?
Yes, for a building already placed in service and depreciating straight-line. The change is made on Form 3115 under Rev. Proc. 2015-13, with the cumulative catch-up taken in the year of change and no amended returns required. Whether the timing works for your 2026 return is a question for your preparer.
Facing the December inclusion with an OZ property in the fund? Start with a free savings estimate to see what the depreciation side is worth before your preparer models the year.
Valuing the fund interest is a separate discipline from the depreciation work described here. 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.
