How Opportunity Zones work, step by step

You move a capital gain into a Qualified Opportunity Fund, the fund builds or improves property in a designated zone, and you hold. The tax law rewards the gain going in and the growth coming out.¹ A Qualified Opportunity Fund (QOF) is a partnership or corporation that invests at least 90% of its assets in Opportunity Zone property and certifies itself to the IRS on Form 8996.⁵

An eligible gain is a capital gain (short-term or long-term) that would be recognized for federal income tax purposes, from a sale to an unrelated party.^2,4 It includes gains from stocks, bonds, crypto, a business sale, real estate and collectibles, and the gross amount of §1231 gains from business property, unreduced by §1231 losses.⁸ Ordinary income, including depreciation recapture under §1245, is not eligible.⁴

You defer only the gain, not the sale proceeds. If you sell a property for $3 million with a $1 million gain, you need to invest $1 million to defer the whole gain. The full list of what counts is in which capital gains qualify for deferral.

You have 180 days from the date the gain would be recognized to invest it in a QOF.² For most sales that is the trade or closing date. Pass-through owners get more flexibility: a partner or S corporation shareholder can use the entity's sale date, the last day of the entity's tax year, or the unextended due date of the entity's return.⁸

Miss the window and the gain cannot be deferred. See the 180-day investment rule for edge cases.

You make the election on Form 8949, attached to a timely filed federal return for the year the gain arose, reporting the QOF's name, EIN and the investment date and entering the deferred amount as an adjustment.⁹ Every year after that you file Form 8997, which reports the QOF investments you held at the start and end of the year, gains deferred during the year and any dispositions.⁶

The fund has its own filing: Form 8996, which certifies QOF status and reports the 90% asset test each year.⁵ Under proposed regulations published September 11, 2026, Form 8996 would become a separate information return with census-tract detail, and new §6726 penalties of $500 per day (capped at $10,000, or $50,000 for funds above $10 million in gross assets) apply for missing or incomplete reports. Those regulations are proposed, not final.¹⁰ See Form 8996 and Form 8997, explained.

The fund puts the money to work in the zone. It must keep at least 90% of its assets in Qualified Opportunity Zone property, measured on two testing dates each year, or pay a monthly penalty on the shortfall.^3,5 Most funds meet the test by owning equity in a Qualified Opportunity Zone Business, which then owns and operates the real property.

The two-tier structure matters because the business tier has more room: only 70% of its tangible property must qualify, and it can hold cash for up to 31 months (62 months with sequential plans) under a written working capital safe harbor while it builds.^3,7

The property must be new to the zone (original use) or substantially improved, meaning the business adds more than its purchase basis in the building within 30 months. In wholly rural zones the threshold is 50% of basis.¹¹ Land does not need to be improved.

At year 5 the deferred gain is taxed, reduced by a basis step-up; at year 10 you become eligible to exclude all appreciation. For amounts invested on or after January 1, 2027, the deferred gain is included in income on the earlier of the date you sell or exchange the investment or five years after you invested.^1,12

Since the deferred tax is due in year 5 while the money stays in the fund, plan to pay it from other cash. After 10 years, when you sell the QOF interest, you can elect to step up its basis to fair market value, so no federal gain is recognized on the appreciation. For sales after the 30th anniversary, basis is fixed at fair market value on that anniversary.^1,12 The details are in the five-year deferral and the 10-year hold.

Here is an illustrative case. Assumptions: an individual sells stock in March 2027 with a $1,000,000 long-term gain; a 23.8% federal rate (20% top capital gains rate plus 3.8% net investment income tax); no state tax; the investment doubles over 10 years.^13,14

1. 1.May 2027 (day 60): invests $1,000,000 in a standard QOF and elects deferral on Form 8949. Tax due now: $0 (it would have been $238,000).
2. 2.May 2032 (year 5): deferred gain is included with a 10% step-up. Taxable amount: $900,000. Tax: $214,200, paid from other funds.
3. 3.May 2037 (year 10 or later): the investment is worth $2,000,000. On sale, the investor elects fair market value basis. Federal tax on the $1,000,000 of appreciation: $0, versus $238,000 if it were taxable.

Total federal tax paid: $214,200 on $2 million of combined gain. Without the program, the investor would have paid $238,000 on the original gain plus tax on the reinvested growth. A rural fund would cut the year-5 tax to $166,600 (70% of the gain taxed). A full worked example compares the after-tax outcomes in detail.

The OZ clock and a data center schedule line up well, with one caution. The 10-year minimum hold suits a stabilized campus, and the working capital safe harbor (31 months, up to 62 with sequential plans, plus tolling for government permitting delay) covers a typical build.⁷ The caution is power: utility load interconnection can take longer than the safe harbor, and whether utility interconnection delays qualify for the government-delay tolling rule is unsettled, so funds should secure power commitments before cash goes in. See data center power timelines and the OZ clock.