GENIUS Act Stablecoin Comment Deadline Hits Oct. 19

The U.S. Treasury Department’s comment period on its proposed regulations to implement Section 3 of the GENIUS Act ended on October 19, 2026. That deadline closed the public-input window on the proposal — it does not mean the final stablecoin rules are now in effect.

Treasury published the notice of proposed rulemaking on August 17, 2026, and the Federal Register ran it the next day, August 18. The proposal covers payment-stablecoin issuance, offering and sale in the United States, with October 19, 2026 set as the deadline for public comments.

The immediate development was procedural. Public comments on Treasury’s GENIUS Act proposal were due on or before October 19, 2026. Treasury said it was seeking public comment on its implementation of Section 3 of the Act, and the Federal Register notice set the same deadline for the proposed rule.

That distinction matters: the deadline closes the consultation phase, not the regulatory process itself. The source record supports calling this a proposal on payment stablecoins — not a final rule — and nothing in it establishes final obligations taking effect on October 19.

Treasury’s notice concerns regulations implementing Section 3 of the GENIUS Act, the section governing payment-stablecoin issuance, offer and sale in the United States. The agency’s August 17 press release and the Federal Register notice describe the same rulemaking effort and point to the same consultation process.

KPMG’s alert summarizes the proposal as covering who may issue, offer, sell or otherwise make available payment stablecoins in the United States. That description lines up with the scope laid out in the government notices, but it’s a secondary source and shouldn’t stand in for the full regulatory text.

The timeline is straightforward. Treasury announced the notice of proposed rulemaking on August 17; the Federal Register published it on August 18; the comment deadline fell on October 19. That gave market participants roughly 60 days after Federal Register publication to respond — the window Treasury said it was using for public input.

For crypto firms, the direct implication is that the rulemaking record now depends on what Treasury received during that window and how the department treats those comments next. The available sources don’t supply a final rule, a final effective date, or a completed implementation timetable.

The parties most directly affected are payment-stablecoin issuers and businesses involved in issuing, offering, selling or making payment stablecoins available in the United States. Those are the activities the proposal centers on, and the ones Treasury asked the public to weigh in on.

For those firms, the practical change on October 19 is simpler than it might sound: the comment window closed. The sources don’t support saying that licensing, reserve, custody, disclosure or platform obligations began that day — any such claim would require the final rule or other official Treasury action not included in this record.

The next visible milestone should be Treasury’s post-comment action: reviewing the record, making possible revisions, and issuing any final rule or implementation timetable. Those steps will show whether Treasury keeps the proposal intact, narrows it, or shifts its timing.

The supplied sources give no date for those later steps, so readers should watch for Treasury announcements rather than assume an immediate follow-up. For now, October 19 marks the end of public comment on proposed GENIUS Act stablecoin rules — not the date the framework became complete.