IRS Rev. Proc. 2026-21, 2026-22 IRB 1, issued May 5, 2026, reinstates the Internal Revenue Service’s “significant issue” letter ruling program, under which the IRS will rule on specific, significant issues posed by a transaction without ruling on the entire integrated transaction. This new ruling program comes after the IRS suspended it in 2024, and after the agency withdrew proposed regulations on tax-free spin-offs last September.
The program will allow taxpayers to seek letter rulings on significant, specific issues relevant to either tax-free spin-off under § 355 of the tax code. Under this program, the IRS may, for example, issue a letter ruling addressing significant issues presented by the application of § 355(e), even though the ruling does not address overall qualification of the transaction as a tax-free spin-off under § 355.
In addition to tax-free spin-offs under § 355, significant issue rulings are also available for transactions (or parts of transactions) governed by §§ 332, 351, 368, or 1036. It is notable that in recent years, the IRS has ruled privately on a broad range of corporate transactions. For example, in recent months, the IRS has issued private letter rulings (PLRs) on many different corporate topics, including delayed transfers of assets in a type C reorganization (PLR 202607001), whether stapled stock participated in corporate growth for purposes of § 305(b)(4) (PLR 202532005), and qualification of a transfer of property subject to a retained interest as “property” for purposes of § 351 (PLR 202524005). Thus, the new significant issue program may be helpful for taxpayers contemplating transactions other than tax-free spin-offs.
Rev. Proc. 2026-21 defines “significant issue” as a “germane and specific issue of law, provided that a ruling on the issue would not be a comfort ruling or the conclusion in such a ruling otherwise would not be essentially free from doubt.” A ruling must be narrowly tailored to be the “narrowest articulation of the germane issue.” Notably, the Rev. Proc. 2026-21 states that “a change of circumstance arising after the transaction” does not present a significant issue with respect to the transaction.
Rev. Proc. 2026-21 provides procedural rules for making such a filing. The significant issue ruling program applies immediately to ruling requests received by the IRS (or mailed) after May 5, 2026.