The Treasury Department has released Notice 2026-40, providing the first practical transition framework for investors moving from the original Opportunity Zone tax incentive program into the extended Opportunity Zone 2.0 structure. The notice establishes critical deadlines and eligibility windows for capital deployed under the Tax Cuts and Jobs Act of 2017 programme, which created tax incentives for long-term investment in lower-income communities designated as Qualified Opportunity Zones. Treasury intends to issue formal regulations consistent with the rules outlined in the notice.

Opportunity Zones allow investors to defer capital gains tax by reinvesting proceeds into a Qualified Opportunity Fund within 180 days of realisation. Investments flow through a two-tiered structure: taxpayers invest in a QOF, which in turn deploys capital into a Qualified Opportunity Zone Business that purchases or develops property in designated zones. The incentive offers three tax benefits: deferral of the original gain, elimination of tax on 10 to 30 percent of that deferred gain, and complete exclusion of federal income tax on appreciation and depreciation recapture for investments held at least ten years.

Under the new transition rules, investors holding OZ 1.0 positions must recognise any remaining deferred gain by December 31. That recognised gain cannot be rolled into OZ 2.0 for a fresh deferral. However, taxpayers who trigger an inclusion event by selling their OZ 1.0 investment before year-end can reinvest proceeds into OZ 2.0 to continue deferring the realised gains. This strategy restarts the holding period required to qualify for the ten-year appreciation exclusion benefit.

The notice creates a narrow eligibility corridor for capital gains realised during 2026. Taxpayers with gains from assets held directly can invest in OZ 2.0 during the portion of their 180-day window that falls in 2027. For gains realised through pass-through entities, investors may elect to start the 180-day clock as late as the unextended due date of the entity's income tax return for the year the gain was recognised. This means capital gains realised through pass-through entities at any time in 2026 remain eligible for OZ 2.0 treatment if invested by early September 2027.

Direct capital gains realised by taxpayers in the second half of 2026 similarly qualify under the extended window. The flexibility around pass-through entity gains provides additional runway for K-1 recipients who may not learn of their gain allocation until spring tax filings. Investors evaluating pending transactions should consider the timing of realisation and the structure through which gains will flow to maximise eligibility for the new programme.

Treasury confirmed that new Opportunity Zone census tracts will be designated by individual states by October 28, with designations taking effect January 1, 2027. The refreshed tract map will expand the geographic footprint available for OZ 2.0 investments, though the notice does not specify how many new zones will be added or which communities are under consideration. Investors with projects in current OZ tracts should verify whether those designations will carry forward or require redesignation under the new framework.

Notice 2026-40 recommends that investors review existing OZ 1.0 positions, projects under development, and 2026 capital gains before year-end. Particular attention should focus on working capital safe harbour compliance, alignment with new tract designations, and whether Rural QOF benefits may apply to future investment structures. The notice does not represent final guidance, and formal regulations are expected to follow. Many states offer corresponding income tax incentives, though the notice does not address state-level transition rules or conformity timelines.