How Opportunity Zone Apartment Syndications Work After the 2025 Law
An Opportunity Zone apartment syndication is a deal organized as a qualified opportunity fund (QOF) that invests in apartment property inside a designated low income census tract. You invest an eligible capital gain within 180 days, which defers tax on that gain, and if you hold the fund investment for at least 10 years you can elect to step up its basis to fair market value when you sell, so the appreciation on the fund investment is not taxed. The 2025 tax law, Public Law 119-21, made the program permanent and, for amounts invested after December 31, 2026, replaces the fixed 2026 deadline with a rolling 5-year deferral.
This post covers how the rules work for an investor, what changed in July 2025, and why apartment deals in particular must meet the "substantial improvement" test. Rules are as of October 2026. Tax law here is detailed and new regulations may follow, so treat this as a map for a conversation with your CPA. It builds on taxes for syndication investors.
How does an Opportunity Zone investment work?
There are three parts:
- An eligible gain. You sell something, such as stock or real estate, and realize a capital gain. The IRS says you generally have 180 days to invest that gain in a QOF, starting on the date the gain would be recognized. Partners who receive a gain through a K-1 have extra choices for when the 180 days start. See the IRS Opportunity Zones FAQ.
- A qualified opportunity fund. A corporation or partnership organized to invest in qualified opportunity zone property that holds at least 90% of its assets in that property, tested twice a year. It self certifies by filing Form 8996 each year. See 26 U.S.C. 1400Z-2.
- Qualifying property. Property used in a designated zone, bought after the zone's start date, whose original use begins with the fund, or which the fund substantially improves.
Investors report deferral elections and their fund investments on Form 8997 each year.
What did the 2025 law change?
Section 70421 of Public Law 119-21, signed July 4, 2025, made the program permanent. The main changes for investors:
| Topic | Old rules | Amounts invested after December 31, 2026 |
|---|---|---|
| When deferred gain is taxed | Earlier of a sale or December 31, 2026 | Earlier of a sale or 5 years after the investment |
| Basis increase for a 5-year hold | Tied to holding periods that had to end by the 2026 date | 10% of the deferred gain, or 30% in a qualified rural opportunity fund |
| 10-year step-up | Basis equal to fair market value at sale | Same, but measured no later than 30 years after the investment |
| Zones | Tracts designated in 2018 | New 10-year designations, with determinations starting July 1, 2026 and a revised low income test |
The law also adds a reporting regime for funds, including the number of residential units in the real property they hold, and lowers the substantial improvement threshold to 50% of basis for property in a zone made up entirely of a rural area. That rural change took effect on enactment.
One timing point matters for anyone investing now. Under the old rules, gain deferred into a QOF during 2026 is still included at December 31, 2026, so the deferral is short. The new rolling deferral applies to amounts invested after December 31, 2026. Ask your CPA which side of that date makes sense for your gain.
What does the 10-year step-up do?
If you hold a qualifying investment in the fund for at least 10 years, you can elect to treat its basis as equal to its fair market value when you sell or exchange it. The IRS FAQ says that, as a result, "the appreciation in the QOF investment is never taxed." For a partnership fund, a similar election can exclude gain from the fund's sale of assets after the 10 years, under conditions the FAQ lists.
The deferred original gain is a separate matter. It is still taxed at the inclusion date. The 10-year benefit applies to growth on the fund investment, and it depends on the fund keeping its qualified status throughout.
Why must an apartment deal "substantially improve" the building?
Because most apartment buildings in a zone are not new. To count as qualified property, either the original use must begin with the fund, as in new construction, or the fund must substantially improve the property. The statute says property is substantially improved only if, during any 30-month period after acquisition, additions to its basis exceed its adjusted basis at the start of that period. In practice, the fund roughly doubles its basis in the building.
The IRS FAQ adds that land under a building used in a trade or business generally does not need to be improved, so the test looks at the building, not the land. Unimproved or minimally improved land must be improved.
That shapes which apartment deals fit:
- Ground-up development generally meets the original use test.
- Heavy rehabilitation can meet the doubling test, but it carries construction risk. See ground-up development vs. value-add.
- A light value-add plan, such as interior upgrades on a stabilized building, usually does not spend enough to double the building's basis.
A made-up example
This example uses made-up numbers to show the test. It is not a forecast and does not describe any real deal.
A fund buys an apartment building in a zone for $6,000,000. Of that, $1,500,000 is allocated to land and $4,500,000 to the building.
| Item | Amount |
|---|---|
| Building basis at the start of the 30-month period | $4,500,000 |
| Improvements needed to exceed it | More than $4,500,000 |
| Planned renovation budget | $4,800,000 |
| Meets the test if spent within 30 months? | Yes, $4,800,000 is more than $4,500,000 |
A $1,200,000 interior program on the same building would not come close. The land's $1,500,000 is generally not part of the test.
What should I ask an Opportunity Zone sponsor?
- Is the fund a QOF that files Form 8996, and how does it meet the 90% asset test?
- Which zone is the property in, and does that designation run long enough for the plan?
- How will the fund meet the original use or substantial improvement test, and on what schedule?
- What is the plan for a 10-year hold, and what happens if the sponsor wants to sell sooner?
- How will you pay the tax on your deferred gain at the inclusion date, since the fund may not distribute cash then?
Read the offering documents closely. A tax benefit does not make a weak deal a good one. See how to vet a syndication.
How DoorRaise fits in
DoorRaise helps sponsors raise equity for apartment buildings with 5+ units from their friends and followers under Rule 506(b) or 506(c). It prepares the standard offering documents, files Form D and state notices, forms the LLC and verifies accredited investors for 506(c) deals. Escrow is at Enterprise Bank & Trust, an FDIC-insured bank, investors fund by wire, and distributions are quarterly by default. DoorRaise does not certify funds as QOFs and gives no tax advice. See how it works.
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FAQ
Can I invest cash that is not from a capital gain?
You can, but only the part that comes from an eligible gain invested on time gets the Opportunity Zone tax treatment. Other money is treated as an ordinary investment in the fund.
When does my 180-day period start?
Generally on the date the gain would be recognized. If the gain comes to you through a partnership K-1, the IRS FAQ lists other start dates you can choose.
Does the 10-year rule make the whole investment tax free?
No. It can remove tax on appreciation of the fund investment. The original deferred gain is still taxed at the inclusion date.
Does a value-add apartment deal qualify?
Only if the fund substantially improves the building, roughly doubling its basis within 30 months, or the property's original use begins with the fund. Most light value-add plans do not.
Next step: read ground-up development vs. value-add syndication to weigh the construction risk these deals often carry.
Sources
- IRS: Opportunity Zones frequently asked questions
- IRS: Opportunity zones
- 26 U.S.C. 1400Z-2: Special rules for capital gains invested in opportunity zones (Cornell LII)
- Public Law 119-21, section 70421 (congress.gov)
This article is general information, not legal, tax or investment advice. Talk to a tax professional about your situation. DoorRaise is not a law firm, broker-dealer, investment adviser or funding portal.