
As states finalize the next Opportunity Zone maps, Treasury and the IRS are seeking input on program rules while lawmakers weigh whether data centers should qualify for OZ tax benefits.
Treasury Seeks Input on OZ Rules
- In a Sept. 22 notice, Treasury and the IRS requested comments on how to implement the permanent OZ program, specifically regarding housing investment, working capital rules, operating businesses and the tax treatment of long-held investments. Comments are due Nov. 23. (Tax Notes, Sept. 22 | Bloomberg Law, Sept. 23)
- The request follows proposed regulations issued Sept. 11 on reporting requirements for Qualified Opportunity Funds (QOFs) and OZ businesses, as well as fund certification and decertification. Comments on that separate proposal are due Oct. 16. (PoliticoPro, Sept. 10)
RER Advocacy
- RER’s Opportunity Zone Working Group has urged Treasury and the IRS to adopt clear, workable rules that allow existing projects to continue through the transition to the permanent program. The Group also recently met with Treasury and IRS staff in August to discuss guidance for projects spanning the original and permanent OZ programs.
- In July 29 comments, RER sought clearer rules for multiphase projects, property improvements, and continued investment in original OZ tracts through their statutory expiration in 2028. (Roundtable Weekly, Sept. 11 | Roundtable Weekly, July 31)
- The comments build on RER’s earlier efforts to prevent uncertainty from delaying housing and redevelopment. IRS Notice 2026-40, issued in June, incorporated several RER recommendations following the group’s March proposal for transition relief and its December 2025 letter. (Roundtable Weekly, March 6 | Letter, Dec. 19)
- The new maps and forthcoming rules will shape where and how OZ capital can support housing, redevelopment and other projects in low-income communities.
New Opportunity Zones Maps
- Governors are finalizing nominations for the next generation of OZs ahead of a Sept. 28 deadline, with a 30-day extension available upon request. Treasury will certify the new designations, which take effect Jan. 1, 2027 and remain in place for 10 years.
- The tighter eligibility rules are expected to significantly reduce the number of designated OZs. Roughly, 6,500 zones could be selected nationwide, nearly 26% fewer than the 8,764 designated under the original program. (Bisnow, Sept. 15)
- The designation process will help determine where new OZ-supported investment can occur beginning in 2027. While the original program attracted significant multifamily investment, developers are now pursuing designations for a broader range of real estate projects, including mall redevelopments and data centers. (Bisnow, Sept. 15)
Data Center OZ Legislation

- Last week, Sen. Hawley (R-MO) introduced the No Tax Breaks for Data Centers Act, which would exclude data centers from OZ tax benefits while preserving the incentive for other eligible investments. (Sen. Hawley Press Release, Sept. 17)
- The bill follows a House Democratic proposal, Reverse Big Ugly Tax Breaks for Data Centers Act, that would deny covered data centers both OZ eligibility and 100% bonus depreciation. (Politico | Roundtable Weekly, Sept. 18)
RER will continue working with Congress, Treasury, and the IRS to secure and improve OZ rules to ensure the incentives support economic development and job growth, new sources of local tax revenue, and expanded housing supply.















