For seven years, every opportunity zone conversation carried the same warning: Hurry — the benefit ends at the close of 2026. Reinvest now or lose the deferral.
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That urgency drove billions into qualified opportunity funds and shaped how every practitioner advised clients.
That framework is now wrong in two directions. The One Big Beautiful Bill Act made opportunity zones a recurring, permanent regime. The IRS has issued Notice 2026-40 to govern the transition. And the Dec. 31, 2026, date everyone treated as the program’s expiration is something else entirely. It is the mandatory deferred-gain inclusion date for many pre-OBBBA investors, not the day the zones disappear.
If you have high-net-worth clients with capital gains, retire the old playbook. The program is now a recurring planning regime.
The OBBBA moved opportunity zones from a one-time 2018 designation map to a permanent recurring regime. New QOZ designations will be made through a decennial process, and each new designation generally lasts for a 10-year period. The first post-OBBBA designation cycle begins with the July 1, 2026, decennial determination date, and tracts certified and designated during 2026 will have a designation period running from Jan. 1, 2027, through Dec. 31, 2036.
The original designations do not vanish at the end of 2026. Previously designated zones remain designated until Dec. 31, 2027, for Puerto Rico deemed-designated tracts and Dec. 31, 2028, for all others. Planning is no longer a last-chance exercise, but the transition rules make 2026 a pivotal year for both investors and fund sponsors.
Deferral, partial reduction and long-term gain elimination still anchor the benefit.
The core structure remains. A taxpayer with eligible gain from a sale or exchange with an unrelated person can elect to defer that gain by investing the corresponding amount in a QOZ fund during the applicable 180-day period. The period generally begins when the gain would otherwise be recognized, but special timing rules apply for regulated investment companies’ and real estate investment trusts’ capital gains dividends, passthrough gains and regular-way stock trades. For regular-way trades, the clock starts on the trade date.
For post-2026 investments, the old fixed Dec. 31, 2026, inclusion date gives way to a five-year framework. Deferred gain from a qualifying investment made on or after Jan. 1, 2027, is included at the earliest of a sale or exchange, another inclusion event, or five years after the investment date. Hold the investment at least five years and the taxpayer receives a basis increase equal to 10% of the deferred gain, or 30% for a qualifying investment in a qualified rural opportunity fund.
The 10-year benefit remains the most powerful feature for high-net-worth clients. For a qualifying investment held at least 10 years, the taxpayer can elect to step up basis to fair market value. Under the amended rule, that adjustment occurs on the earlier of the date the investment is sold, or 30 years after the investment date. Economically, this can eliminate federal income tax on post-investment appreciation, subject to the new 30-year measurement rule.
A new enhanced incentive for rural investment
The OBBBA created a qualified rural opportunity fund category with a more generous five-year basis increase. A standard post-2026 investment held five years receives a 10% increase. A qualifying investment in a rural fund receives 30% if the holding-period and fund-qualification requirements are met.
This is not a general bonus for any rural project. A qualified rural opportunity fund must hold at least 90% of its assets in QOZ property tied to zones entirely comprising rural areas. For clients considering rural real estate, infrastructure, energy projects or rural operating businesses, the enhanced basis increase can materially improve after-tax returns. The fund must actually qualify, and the rural asset mix must be monitored over time.
Transitional rules protect existing investments, but they do not eliminate the 2026 tax bill.
Notice 2026-40 provides bridge guidance for investments made under the pre-OBBBA rules. Existing qualifying investments do not lose status because of the transition. But a taxpayer holding a pre-2027 investment through Dec. 31, 2026, must include the remaining deferred gain in income for the taxable year that includes that date. The deemed inclusion cannot be re-deferred into another fund because the original deferral election stays in effect.
This is critical for legacy positions. They may still qualify for the 10-year fair-market-value election on a later sale, but the original deferred gain comes into income in 2026 if an earlier inclusion event has not already triggered it. Model the federal tax, state tax, estimated-tax impact and liquidity needed to pay a bill that arrives without a fund-level cash event.
Post-2026 acquisitions in old zones create a new diligence risk
The notice creates a major issue for funds planning to buy or develop property in previously designated zones after Dec. 31, 2026. For tangible property acquired after that date to qualify, it generally must be purchased after the tract’s applicable start date. A previously designated zone has no OBBBA start date because it was designated before the OBBBA, so property acquired after Dec. 31, 2026, for use in an old zone generally cannot qualify unless the tract is newly designated or a transition exception applies.
Two exceptions exist. First, post-2026 property in an old zone can qualify if it’s acquired under a written working-capital plan adopted on or before Dec. 31, 2026, the acquisitions stay substantially consistent with the plan, and the business has received at least 10% and expended at least 5% of its estimated working capital by that date. Binding pre-2027 obligations can count as expended. Second, post-2026 property qualifies if it replaces or modernizes existing business property in the ordinary course. That exception does not cover expansion or entry into a new line of business. A 2028 expansion in a 2018 zone may produce no qualified property unless it fits a transition rule or the tract is newly designated.
Existing projects get runway after old zones expire
The notice also provides post-expiration safe harbors. Certain funds and businesses may continue to treat expired zones as zones through Dec. 31, 2047, for specific compliance purposes, including the substantially-all-use requirement for qualifying tangible property.
A business that began active conduct in an old zone before expiration, or reasonably expects to under a qualifying written plan, may also continue treating the expired zone as a zone through Dec. 31, 2047, for the 50% gross income test and the intangibles-use test. This is favorable, but it is not a blanket rule that expired zones remain zones for every purpose.
Why this is urgent for HNW clients
State conformity can materially change the result. Notice 2026-40 is federal guidance. High-net-worth clients with multistate residency, trusts, passthrough gains or state-source gains need a state-by-state conformity review before relying on federal QOZ projections.
Some jurisdictions decouple from the federal deferral or 10-year exclusion, conform only to a fixed version of Section 1400Z-2, or impose local certification and filing conditions. For example, North Carolina requires an addback for gain deferred federally under Section 1400Z-2(a) and also decouples from the section 1400Z-2(c) 10-year exclusion.
Here’s what to do now:
Identify every client with eligible gains and calculate the correct 180-day window. Do not assume the clock starts when cash is received. For regular-way trades it starts on the trade date, and special rules govern RIC and REIT dividends and passthrough gains.Inventory existing positions and model the Dec. 31, 2026, inclusion. Calculate the remaining deferred gain, estimated-tax obligations, state conformity, net investment income tax exposure, and liquidity. Do not assume the 2026 deemed inclusion can roll into a new fund. It cannot.Separate pre-2027 and post-2026 investments in your model. Pre-2027 positions remain subject to the old inclusion rule. Post-2026 positions follow the five-year inclusion rule and the 10% or 30% basis increase. Model standard funds against rural funds, including the five-year tax payment, the basis differential, state treatment, fees, leverage, projected exit and whether the client can hold 10 years.Run state conformity before presenting after-tax projections. Confirm whether each relevant state conforms to the amended federal QOZ rules, decouples from deferral or exclusion, conforms to a fixed-date version of the code, limits benefits to in-state zones, or requires separate state filings or certifications. This is especially important for high-net-worth clients with resident-state exposure, nonresident-source gains, trusts, passthrough entities, or QOF investments outside their home state.Do due diligence on any fund acquiring property in an old zone after Dec. 31, 2026. Confirm whether the tract is newly designated or whether the fund relies on the working-capital or ordinary-course exception. Request testing procedures, working-capital plans, census tract support, substantial-improvement budgets and related-party analysis. The OBBBA added annual fund reporting and written statements from applicable businesses. Coordinate fund planning with estate and liquidity planning before any interest is transferred, gifted, redeemed or restructured, because inclusion events turn on those moves.Watch for proposed regulations, but do not wait where 2026 deadlines apply. Forthcoming proposed regulations are expected to track the notice, with final regulations applying to taxable years ending after the notice was issued.
Opportunity zones have moved from a fading incentive to a recurring capital-gains planning regime. The best opportunities will go to clients who identify eligible gains early, plan for the 2026 transition tax, “diligence” fund compliance carefully, and compare standard funds with qualified rural opportunity funds before committing capital.
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