Fed Stablecoin Rules Are Late. The GENIUS Act Clock Is Not.

Two Proposals, Sixty Days, and a Statute That Starts Without Them

On September 24, 2026, the Federal Reserve Board requested public comment on two proposed rules that would build the supervisory framework for Board-supervised payment stablecoin issuers under the GENIUS Act: Docket No. R-1899 on prudential standards and Docket No. R-1900 on application procedures. Each carries a 60-day comment period that begins on Federal Register publication, and at release the Board had not yet set that publication date.

Here is the part most coverage is missing. The GENIUS Act required the primary federal payment stablecoin regulators to issue implementing regulations no later than one year after enactment, meaning by July 18, 2026. That deadline passed without final rules, and the Fed only reached the proposal stage in late September. Meanwhile the statute itself takes effect on the earlier of January 18, 2027, or 120 days after final rules issue.

Do the arithmetic. A 60-day comment window that has not started, followed by comment review and a final rule, will not produce finished federal regulations before January 18, 2027. The Act switches on regardless. Here is what happened, why the sequencing matters commercially, and what your leadership team should decide before year-end.

Why the Missed July 18, 2026 Deadline Reprices Your Launch Plan

The GENIUS Act was not a close vote. S. 1582 passed the Senate 68-30 on June 17, 2025, and the House 308-122 on July 17, 2025, and was signed into law as Pub. L. 119-27 on July 18, 2025. The political question is settled. The mechanical question is not.

The self-executing date is the one that binds you

Most founders have been tracking rule releases as the trigger for compliance work. That is backwards. The statutory prohibitions and eligibility requirements attach on the effective date whether or not the implementing rules are final. If January 18, 2027 arrives first, the operative legal standard for a period of months is the statute plus whatever agency expectations exist in proposal form.

That creates a specific and uncomfortable posture: your product must satisfy a statute that is in force, while your reserve, capital, and application mechanics are governed by proposals that could still change in response to comments.

The agencies are not moving in lockstep

The Fed is the last of the three primary movers to propose. The OCC issued its GENIUS Act NPRM on February 25, 2026, published in the Federal Register on March 2, 2026 under Docket ID OCC-2025-0372, with a comment period that closed May 1, 2026. Treasury published its section 3 proposal on August 18, 2026, with comments due October 19, 2026.

Three agencies, three different points on the calendar, one shared effective date. Charter selection is now partly a bet on which regulator finishes first.

The 93-Day Treasury Cap Is the Real Business Constraint in R-1899

The headline requirement in Docket R-1899 is one-to-one backing with permissible reserve assets, plus standardized capital requirements and risk-management standards for Board-supervised permitted payment stablecoin issuers. That much was expected.

The operative detail sits in the eligibility list. As described in the proposal, permissible reserves would be limited to U.S. dollar cash, Federal Reserve Bank balances, demand deposits or insured shares at insured depository institutions, Treasury securities with 93 days or less of remaining maturity, overnight Treasury-backed repurchase and reverse repurchase agreements, and shares of eligible investment funds.

Ninety-three days is a yield decision disguised as a compliance rule. A reserve portfolio confined to the very front end of the curve and overnight repo generates materially less carry than one that reaches out six or twelve months. For issuers whose entire revenue model is float, that single number changes the unit economics of the business.

It is also an operations decision. Rolling a multi-billion-dollar book inside a 93-day band means more frequent reinvestment, tighter liquidity monitoring, and attestation processes that can prove maturity compliance on any given date, not just at quarter-end.

If your projected margin assumed longer duration, the comment period is the moment to say so on the record. Reserve composition is exactly the kind of technical parameter that agencies adjust between proposal and final rule when commenters show the arithmetic.

R-1900 Answers One Question Precisely and Leaves Another Open

The second proposal, Docket No. R-1900, RIN 7100-AH30, amends 12 CFR Parts 247 and 262 to create a tailored application process for insured state member banks seeking Board approval for a subsidiary to issue payment stablecoins. It includes a 120-day decision window and procedures for appeals, hearings, and final determinations.

The distinction that matters

A defined 120-day clock with an appeal path is a meaningful concession to commercial reality. It converts an open-ended supervisory conversation into something a board can schedule around and a fundraising deck can reference.

But notice who gets it. R-1900 is built for the subsidiary of an insured state member bank. If you are a technology company, a payments platform, or a digital asset firm without a bank charter, this proposal does not give you a timeline. Your path runs through a different regulator or a state regime, on a different calendar.

What that means for structuring

• If you already sit inside a state member bank, the application route is now legible. Build the 120-day window into your product launch plan and identify who owns the filing.
• If you do not, the charter question moves ahead of the product question. Acquiring or partnering into a supervised entity is a 2027 decision, not a 2028 one.
• If you intend to operate under state supervision, read the federal transition provisions closely. Growth past a federal threshold is a supervisory event, not merely a milestone.

What Your Leadership Team Should Decide This Quarter

Four decisions that cannot wait for a final rule

1. File a comment, or accept the proposal as written. The reserve eligibility list, the capital calibration, and the 120-day application mechanics are all live. A specific, quantified comment from an operating company carries more weight than a trade association letter written in generalities.
2. Model the 93-day reserve constraint against your revenue plan. Ask your finance team for a side-by-side of projected carry under the proposed eligible-asset list versus your current or planned portfolio. If the delta is material, that number belongs in your comment letter and in your board materials.
3. Pick your regulator before January 18, 2027. The OCC path, the Board-supervised bank subsidiary path, and state supervision impose different capital, application, and reporting profiles. Direct your general counsel or outside digital assets counsel to produce a written comparison, not a verbal recommendation.
4. Assume the statute binds you before the rules do. Draft your reserve policy, attestation cadence, and redemption terms to the statutory text now, with proposal-level detail as the working assumption, and build in the ability to amend when final rules land.

The contracts nobody has reopened yet

Distribution agreements, custody arrangements, and reserve management mandates signed in 2025 were written against an unwritten rulebook. Most contain no mechanism for reallocating cost when a maturity cap compresses yield or when a supervisory application takes 120 days. Those allocation questions are cheaper to fix in a renegotiation than in a dispute.