Treasury and the IRS released additional guidance on May 29, 2026, addressing the applicability dates of the proposed regulations under Section 892 of the Internal Revenue Code. Section 892 is the statutory exemption that allows foreign governments, including sovereign wealth funds, to avoid U.S. tax on certain income from passive U.S. investments. The new guidance does two things at once: it grandfathers existing foreign government interests so they will not be pulled into the final regulations, and it gives sovereign investors a transition window before the new rules bind them.
What changed and why
On December 15, 2025, Treasury and the IRS issued proposed regulations clarifying two pressure points under Section 892. First, when an acquisition of debt by a foreign government counts as “commercial activity.” Second, when a foreign government is treated as having “effective control” of an entity engaged in commercial activities. Either determination is consequential, because the Section 892 exemption does not apply when the foreign government is engaged in (or controls an entity engaged in) commercial activity. In plain terms, the December proposal expanded the conditions under which sovereign investors could lose the exemption.
After reviewing stakeholder comments, Treasury and the IRS introduced a two part approach in the new guidance:
Grandfathering rule. The guidance proposes new applicability dates designed to ensure that existing foreign government interests would not be subject to the final regulations. Existing positions are protected from being swept into the new framework once the rules are finalized.
Transition period. A foreign government will have at least 90 days after the publication date of the final regulations, or until the start of its first taxable year after the publication date, to come into compliance with the final rules. The longer of those two periods controls in practice.
Treasury and the IRS confirmed that they continue to consider comments on all aspects of the proposed regulations. Comment submission instructions are included in the new guidance itself.
Why this matters for tax pros
Most practitioners will never touch a Section 892 return. The provision lives in a narrow corner of inbound international tax. But for counsel advising sovereign wealth funds, pension funds owned by foreign governments, joint venture sponsors with sovereign LPs, real estate funds with sovereign capital, or any U.S. fund vehicle with foreign government investors, this guidance changes the planning posture in three concrete ways.
First, existing structures get breathing room. The grandfathering rule means that the deal team’s December 2025 fire drill (reviewing every fund document, side letter, and partnership interest held by a sovereign for exposure under the proposed commercial activity and effective control tests) does not become a redo project once the regulations finalize. Counsel can advise that existing interests stay under the old framework, subject to the actual text of the final rule when it lands.
Second, the transition window is now a planning input, not a compliance trap. The “at least 90 days or first taxable year after publication” structure gives institutional clients a defined runway to restructure if needed. For a sovereign investor on a calendar tax year, that could be a full year of lead time depending on when the final rule publishes. For practitioners, the question shifts from “are we exposed” to “what is the cleanest path to the new regime.”
Third, comments are still open. Treasury said it will continue evaluating feedback to “strengthen the American economy, uphold established market practices, and maintain a stable environment” for sovereign investment. If you represent a sovereign client (or a U.S. fund sponsor with sovereign capital) and your December 2025 comment letter never went out because the proposed rule felt baked, the door is still open. The instructions are in the published guidance.
A note on the legal posture. The grandfathering and transition relief are proposed, not final. Until the final regulations are published, this is the government’s stated intent rather than a fixed rule. Counsel should document positions taken in reliance on this guidance and watch the Federal Register for the final text, particularly to see whether the grandfathering scope narrows between proposal and finalization. The IRS link to the Federal Register notice for this guidance is in the source release.
THE TTR TAKE Treasury just gave sovereign investors and the funds that court them a real concession: existing interests get protected, and the clock to comply does not start running until the final rule publishes. If you advise institutional clients with foreign government capital, this is a quiet but significant shift in the planning posture for the next twelve months.
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Direct link to the official Internal Revenue Service announcement.