Corner Post and the Regulation II Challenge

Also called Corner Post v. Board of Governors, Reg II vacatur

A federal court vacated the debit interchange cap in August 2025, stayed its own ruling, and the Eighth Circuit heard argument in May 2026 with a decision pending.

What it is

Corner Post, Inc. v. Board of Governors is the case that put the debit interchange cap in genuine legal jeopardy. On August 6, 2025, the U.S. District Court for the District of North Dakota vacated Regulation II's interchange fee standard entirely. The court's reasoning had three strands. First, that the Federal Reserve impermissibly allowed issuers to recover fixed authorization, clearing and settlement costs, fraud losses and network fees, when the Durbin Amendment authorizes recovery only of incremental authorization, clearing and settlement costs. Second, that a single one-size-fits-all cap conflicts with the statute's direction to consider costs with respect to the transaction. Third, that following the Supreme Court's decision in Loper Bright, the Fed's interpretation receives no deference. Critically, the court stayed its own vacatur pending appeal, stating the concern that interchange fees would otherwise become a completely unregulated market. That stay is why the 21 cent cap remains operative today, and why nothing on any merchant statement changed in August 2025. The Eighth Circuit heard oral argument on May 13, 2026. Reporting from the argument described judges openly skeptical of the Fed's position on including fixed costs. A decision is pending as of August 2026. Nothing is final, and the case could still result in affirmance, reversal, or a remand that sends the Fed back to rewrite the standard.

Why it matters to your business

Nothing about this changes your statement today. The cap is stayed in place. Be skeptical of anyone selling you a product or a switch because of Corner Post. What it does justify is a structural decision. If debit interchange is rebuilt around issuer-specific incremental cost, the resulting savings would flow automatically to merchants on interchange plus pricing and not at all to merchants on flat rate or tiered pricing. Moving to pass-through pricing is defensible on its own merits today and positions you for either outcome. This is education, not legal advice. This case is on appeal and its outcome is genuinely unknown.

Where it gets contested

This is a case about administrative law as much as payments. The post-Loper Bright environment removed the deference courts previously gave agency interpretations, and Corner Post is one of the clearest tests of what that means for a rule that has been in place since 2011 and that an entire industry priced around. Banks and credit unions largely oppose a lower cap and are ambivalent about vacatur, because vacatur without replacement means no cap at all, which sounds attractive until you consider the political response. Merchant groups want a lower cap but did not necessarily want this vehicle, since a vacatur that removes the standard entirely could leave debit interchange unregulated during a rulemaking gap. The genuinely unresolved outcome is what replaces the standard if the Eighth Circuit affirms. An issuer-specific, transaction-specific incremental cost regime would be a fundamentally different market, plausibly cheaper on average and far more variable. Nobody can price that today, and any provider claiming to know what your debit costs will be in 2028 is guessing.

How to check it yourself

Check whether your pricing is interchange plus with a stated markup. If it is, any future change to the debit cap reaches you automatically. If it is not, no outcome in this case will ever appear on your statement.

Receipts

Claims above that are checkable, with where to check them. Published so you do not have to take anyone's word for it.

The district court vacated Regulation II's interchange fee standard on August 6, 2025 and stayed the vacatur pending appeal, with reasoning on incremental costs, per-transaction analysis and Loper Bright
cooley.com ↗
The Eighth Circuit heard oral argument on May 13, 2026 and pressed the Federal Reserve on including fixed costs
courthousenews.com ↗
Regulation II background and the current interchange standard
federalreserve.gov ↗