When is my Opportunity Zone deferred gain taxed?

If you invested the gain in a Qualified Opportunity Fund before 2027, it is taxed on December 31, 2026, unless you sold the fund earlier. You report it on your 2026 return, due April 15, 2027.

Do I owe the tax if I have not sold my Opportunity Zone fund?

Yes. The law makes the deferred gain taxable on December 31, 2026 whether or not you sell. Most funds do not pay out cash for it, so plan to pay the tax from other money.

How much of the deferred gain is taxable?

The smaller of the gain you deferred or the fund's fair market value on December 31, 2026, minus your basis. Basis is 15% of the deferred gain if you invested by December 31, 2019, 10% if you invested by December 31, 2021, and zero after that.

Which forms do I file for the 2026 Opportunity Zone gain?

Report the gain on Form 8949 and Schedule D, and file Form 8997, the annual statement of your Qualified Opportunity Fund investments.

Do I keep the 10-year tax-free benefit after paying the 2026 tax?

Yes. Paying the tax on the deferred gain does not end your investment. If you hold the fund for at least 10 years, you can elect to step its basis up to fair market value when you sell, so the growth is tax-free.

How is Opportunity Zones 2.0 different?

Gains invested after December 31, 2026 are deferred for up to five years from the investment date instead of to a fixed date. After five years you get a 10% basis step-up, or 30% in a qualified rural fund. The 10-year tax-free growth rule stays, capped at 30 years.

The Opportunity Zone Tax Bill Due in April 2027

Deferred an old gain into an Opportunity Zone fund? It is taxed on Dec 31, 2026 and due with your 2026 return. Who owes, how much, and how OZ 2.0 works.

Opportunity Zones let investors put off tax on a capital gain. Under the original program, "put off" had an end date, and that date is close: December 31, 2026.

Who owes this tax

You owe it if all of these are true:

You sold something at a gain (stock, a business, real estate) in 2018 through 2026.
Within 180 days, you invested that gain in a Qualified Opportunity Fund (QOF) and elected to defer it.
You still held the fund on December 31, 2026. (If you sold earlier, the gain was taxed in the year you sold.)

If you only invested after December 31, 2026, the new rules apply instead. They are covered at the end of this post.

How much of the gain is taxed

The taxable amount is the smaller of two numbers, minus your basis in the fund:

The gain you deferred, or
What your fund investment is worth on December 31, 2026.

Your basis in the fund starts at zero. The original program then adds a step-up based on how long you held the fund by December 31, 2026:

When you invested	Years held by Dec 31, 2026	Basis step-up	Share of the gain taxed
By December 31, 2019	7 or more	15%	85%
January 1, 2020 to December 31, 2021	5 to 7	10%	90%
2022 or later	Under 5	None	100%

The gain keeps the character it had when you deferred it. A long-term gain is taxed at long-term rates (0%, 15% or 20%), plus the 3.8% net investment income tax if your income is above $200,000 single or $250,000 joint.

Three examples

Each of these assumes a long-term gain and a high earner paying 20% plus the 3.8% net investment income tax. Federal tax only.

Investor A: $500,000 gain, invested in 2019. The fund is worth $650,000 on December 31, 2026, more than the gain, so the starting figure is the $500,000 gain. A 15% step-up gives $75,000 of basis.

Taxable gain: $500,000 − $75,000 = $425,000
Federal tax: $425,000 × 23.8% = $101,150

Investor B: $200,000 gain, invested in 2021. The fund is worth $230,000. A 10% step-up gives $20,000 of basis.

Taxable gain: $200,000 − $20,000 = $180,000
Federal tax: $180,000 × 23.8% = $42,840

Investor C: $300,000 gain, invested in 2020, fund lost value. The fund is worth only $210,000 on December 31, 2026. A 10% step-up gives $30,000 of basis. Because the fund is worth less than the gain, the lower value is used.

Taxable gain: $210,000 − $30,000 = $180,000
Federal tax: $180,000 × 23.8% = $42,840

Investor C still owes tax, but on $180,000, not $270,000. A fund that dropped in value shrinks the bill.

Plan the cash now

Most Opportunity Zone funds hold real estate or operating businesses, and they do not pay out cash on December 31, 2026. The tax comes from your own pocket.

Get the fund's December 31, 2026 value. Ask the fund manager when the year-end valuation will be ready. You need it if the fund might be worth less than your deferred gain.
Check your estimated tax safe harbor. If your 2025 adjusted gross income was over $150,000, you avoid an underpayment penalty by paying in at least 110% of your 2025 tax during 2026. If you are short, the fourth-quarter payment is due January 15, 2027. Extra withholding from a December paycheck counts as if it were paid evenly through the year. Our estimated tax payments guide walks through the math.
Look for gains you can offset. Capital losses you harvest by December 31, 2026 can offset this gain. See tax-loss harvesting.
Don't sell the fund just to pay the tax. Selling before 10 years gives up the tax-free growth.
File Form 8997. It is the yearly report of your fund investments. The recognized gain also goes on Form 8949 and Schedule D.

Your 10-year benefit is still intact

Paying tax on the deferred gain does not end the investment. The gain you include in 2026 is added to your basis in the fund. If you hold the fund for at least 10 years from the date you invested, you can elect to treat its basis as its fair market value when you sell. The growth on the fund is then tax-free. Under the original program, that election is available for sales through December 31, 2047.

So Investor A, who invested in 2019, can sell in 2029 or later and pay no federal tax on the fund's growth. That has always been the biggest part of the Opportunity Zone benefit, and it is still there.

How Opportunity Zones 2.0 works from 2027

The 2025 tax law made Opportunity Zones permanent and changed the rules for gains invested after December 31, 2026:

	Original program	OZ 2.0 (investments after Dec 31, 2026)
How long the gain is deferred	Until Dec 31, 2026	Up to 5 years from the date you invest
Basis step-up	10% at 5 years, 15% at 7 years	10% at 5 years (30% in a qualified rural fund)
Tax-free growth	After 10 years	After 10 years, capped at 30 years
Zone map	2018 designations	New zones from Jan 1, 2027 (old map runs through 2028)
Reporting	Form 8996 / 8997	New annual reporting for funds and investors, with penalties

The deferral now rolls. Each investment gets its own five-year clock instead of everyone sharing one end date. The 30% step-up for rural funds is the strongest incentive in the new law.

If you have a gain from late 2026: you normally have 180 days from the sale to invest it. Many advisers point out that a gain from the second half of 2026 can be invested in early 2027, inside its 180-day window, and get the new rules. Treasury guidance on the switch-over is still coming, so confirm the timing with your CPA before you rely on it.

For the full rules, see our guides to Opportunity Zones and Qualified Opportunity Funds. If you are choosing between deferral tools for a real estate sale, compare with a 1031 exchange. For everything else changing next year, read 2027 tax changes.

Sources

Internal Revenue Code section 1400Z-2(b) (inclusion of deferred gain on December 31, 2026, and the basis step-ups)
Internal Revenue Code section 1400Z-2(c) (10-year basis election), and Treas. Reg. 1.1400Z2(c)-1 (elections through 2047)
Public Law 119-21 (One Big Beautiful Bill Act), section 70421 (Opportunity Zones 2.0)
IRS Form 8997 and instructions
IRC section 6654(d) (estimated tax safe harbor)