Opportunity Zones 2.0: The Dec. 31, 2026 Deferred Gain Tax

Last updated: September 27, 2026 · By the Flex Tax and Consulting Group team

If you rolled a capital gain into a Qualified Opportunity Fund (QOF) any time from 2018 through 2026, that deferred gain generally becomes taxable on December 31, 2026, even if you don’t sell anything. It shows up on your 2026 federal return, due in April 2027. At the same time, the 2025 federal tax law made opportunity zones permanent. A new set of zones and new rules (often called Opportunity Zones 2.0) start on January 1, 2027. Here is what that means for existing investors, what changes for new investments, and how California treats it.

Key takeaways

Gains deferred under the original opportunity zone program must generally be included in income on the earlier of an inclusion event (such as a sale) or December 31, 2026. The IRS says these gains can’t be deferred again.
The tax is due with your 2026 return, but there may be no cash from the fund to pay it. Plan for it now.
The 10% and 15% basis increases only applied to investments held 5 or 7 years before the end of 2026, so most investments made after 2021 get no reduction.
Opportunity Zones 2.0 starts January 1, 2027: new zone maps, a rolling 5-year deferral, a 10% basis increase after 5 years (30% for rural funds) and a 30-year limit on the 10-year benefit.
California does not conform to the federal opportunity zone deferral or exclusion. California already taxed the gain in the year you realized it.

What happens on December 31, 2026

Under the original rules, investors who put an eligible gain into a QOF within 180 days could defer that gain. The deferral had a hard end date. According to the IRS opportunity zone FAQs, an investor must include the remaining deferred gain on the earlier of an inclusion event or December 31, 2026.

The amount you include depends on the fair market value of your QOF investment on that date and your basis adjustments. In plain terms, it is generally the smaller of the remaining deferred gain or the investment’s value, reduced by any basis increases you earned. You report it on Form 8949 and reflect the change on Form 8997.

In June 2026 the IRS issued Notice 2026-40, transitional guidance for the move to the new program. It confirms that gains deferred under the original rules must be recognized by the end of 2026 and can’t be re-deferred into a new fund.

Why this surprises people

It’s taxable without a sale. The inclusion happens by law on December 31, whether or not the fund returns any cash to you.
Basis step-ups have mostly run out. The 10% increase required a 5-year hold and the extra 5% required a 7-year hold, both measured before December 31, 2026. In practice, only investments made by the end of 2021 (10%) or the end of 2019 (15%) get them.
Estimated taxes may be affected. A large inclusion can change what you owe in estimated tax for 2026. Review your safe harbor before the January 2027 payment.
The 10-year benefit is separate. If you hold a qualifying QOF investment for at least 10 years, you can still elect to exclude the growth in the investment itself. The December 31 inclusion only covers the original deferred gain.

Opportunity Zones 2.0: what changes for investments after 2026

The 2025 tax law (Public Law 119-21) made the program permanent. Governors nominated new low-income census tracts in 2026, and the new zones take effect January 1, 2027. The designations are then refreshed every 10 years. Here is how the main rules compare.

Rule	Original program (invested before 2027)	Opportunity Zones 2.0 (invested after Dec. 31, 2026)
When deferred gain is taxed	Earlier of an inclusion event or Dec. 31, 2026	Earlier of an inclusion event or 5 years after the investment date
Basis increase	10% after 5 years, 15% after 7 years (if reached by end of 2026)	10% after 5 years; 30% for a qualified rural opportunity fund
10-year benefit	Elect fair market value basis on sale after 10+ years	Same, but value is locked in at the 30-year mark if you hold longer
Zone map	Tracts designated in 2018	New tracts effective Jan. 1, 2027, refreshed every 10 years
Reporting	Forms 8996 (fund) and 8997 (investor)	Expanded fund and investor reporting (proposed regulations issued September 2026)

Notice 2026-40 also indicates that certain gains realized in 2026 may qualify for the new rules if they are invested in a QOF on or after January 1, 2027 within the allowed window. Whether that applies depends on the type of gain, when it was realized and the fund itself. That’s a question for a one-on-one review, not a general rule of thumb.

California: no deferral, so no second tax

This is the part many Bay Area investors miss. California’s Schedule D instructions state that California does not conform to the deferral and exclusion of gains invested in qualified opportunity zone funds under IRC sections 1400Z-1 and 1400Z-2. California residents reported the full gain on their California return in the year it was realized.

The flip side: when the federal inclusion hits on December 31, 2026, California doesn’t tax the same gain again. Your federal and California basis in the QOF will differ, and you’ll need records of both for the eventual sale. Unless California changes its law, the same non-conformity applies to investments under the new rules, so check current FTB guidance before counting on any state benefit.

What to do before year-end

Pull your Forms 8997 from each year since your first QOF investment and confirm the deferred gain still outstanding.
Confirm your investment dates to see whether any 10% or 15% basis increase applies.
Ask each fund for a year-end value estimate and its expected Form 8997 support.
Plan cash for the 2026 tax, including any change to your estimated payments.
Keep California basis records separate from federal basis.
If you have a 2026 gain and are weighing a QOF, get the timing reviewed before you act. The rules differ on each side of January 1, 2027.

If a business sale or real estate sale is part of your 2026 picture, see our 2026 Year-End Tax Planning Checklist, Tax Consequences of Selling an LLC and Understanding Cost Segregation.

FAQ

Do I have to pay tax on my opportunity zone deferred gain in 2026?

Generally yes. Gains deferred under the original program are included in income on the earlier of an inclusion event or December 31, 2026, and reported on your 2026 federal return.

Can I roll my deferred opportunity zone gain into a new Opportunity Zones 2.0 fund?

No. IRS Notice 2026-40 says gains deferred under the original rules can’t be re-deferred. The new rules apply to new eligible gains invested after December 31, 2026.

What is Opportunity Zones 2.0?

It is the permanent version of the program created by the 2025 tax law. It starts January 1, 2027 with new zone designations, a rolling 5-year deferral, a 10% basis increase after 5 years (30% for rural funds) and a 30-year limit on the 10-year benefit.

Does California allow opportunity zone deferral?

No. California does not conform to the federal deferral or exclusion. The full gain is taxable for California in the year it’s realized, so the December 31, 2026 federal inclusion isn’t taxed again by California.

Do I lose the 10-year exclusion if my gain is taxed in 2026?

No. The December 31, 2026 inclusion covers the original deferred gain. The 10-year election for growth in a qualifying QOF investment is a separate benefit.

Sources

Last reviewed September 27, 2026.

Holding a QOF investment or a 2026 capital gain?

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This article provides general information only and is not tax or legal advice. Tax outcomes depend on individual facts and circumstances. Contact us about your specific situation.

Opportunity Zones 2.0: What the December 31, 2026 Deadline Means for Your Deferred Gains