Appeals Court Strikes Down the Fed's Debit Fee Cap: Merchant Playbook

The 8th Circuit debit interchange ruling strikes down the Fed's 21-cent cap. Learn what changes now, what doesn't, and how to get savings onto your statement.

Adrian ReyesSenior Payments & Fintech Editor

October 27, 2026 · 8 min read

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Photo: Pixabay

On this page 7 sections

What the 8th Circuit Debit Interchange Ruling Decided and Why Corner Post Won
Does the 21-Cent Cap Still Apply Today?
How a Rewritten Cap Could Change Your Regulated Debit Costs
Exempt Small Issuers, Routing Rules and What Stays the Same
Interchange-Plus vs. Flat-Rate: Who Actually Sees the Savings
Merchant Action Plan: Audit Debit Mix, Renegotiate and Watch the Fed
How Banks and Credit Unions May Push Back: Fees, Rewards and Lobbying

Key takeaways

The Oct. 26, 2026 ruling sends Regulation II back to the Fed, but it sets no new number. Keep budgeting at the current cap until a replacement takes effect.
Striking down the cap doesn't automatically lower it. Without a stay or a new rule, large-bank debit could briefly have no federal ceiling at all.
The flat per-transaction part of the cap hits small tickets hardest. Liquor stores, convenience counters and grocers with a heavy debit mix have the most at stake.
Only pass-through pricing like interchange-plus delivers a lower cap automatically. On flat-rate pricing, any savings stay with the processor unless you renegotiate.

A federal appeals court has ruled that the Federal Reserve set the debit card swipe-fee cap too high, and the Fed now has to rewrite it. The 8th Circuit debit interchange ruling came down on Monday, Oct. 26, 2026. It upheld a North Dakota decision that threw out Regulation II's limit of 21 cents plus 0.05% per sale. Your debit costs won't drop this week, though. The court didn't set a new number, the Fed hasn't said whether it will appeal, and a lower cap only helps you if your pricing passes it through.

What the 8th Circuit Debit Interchange Ruling Decided and Why Corner Post Won

A unanimous three-judge panel affirmed the district court in Corner Post v. Board of Governors of the Federal Reserve System. Judge David Stras wrote the 11-page opinion, according to Courthouse News.

The fight is over a few lines of federal law. The Durbin Amendment, part of the 2010 Dodd-Frank Act, added Section 920 to the Electronic Fund Transfer Act. Section 920 requires debit interchange (the fee the cardholder's bank collects on each sale) to be "reasonable and proportional to the cost incurred by the issuer with respect to the transaction." It also tells the Fed how to set that standard. The Fed must consider the issuer's incremental cost of authorizing, clearing and settling a particular transaction. It must leave out other costs that aren't specific to a particular transaction.

When the Fed wrote Regulation II in 2011, it let banks recover more than that: fixed processing costs, fraud losses, transaction-monitoring costs and network fees, as the ABA Banking Journal summarized. The Eighth Circuit read the statute to bar any cost "not specific to a particular electronic debit transaction," Payments Dive reported. That rules out the fixed costs of authorization, clearance and settlement. The court also said the Fed must at minimum sort costs into those that are transaction-specific and those that aren't, per America's Credit Unions.

Retailers lost this argument once before. The D.C. Circuit upheld Regulation II in 2014 by deferring to the Fed under the Chevron doctrine, which the Supreme Court has since overruled. With no deference to fall back on, Stras wrote that "Congress could hardly have been clearer." Corner Post is a North Dakota truck stop that opened in 2018. It could only bring the case because the Supreme Court ruled in 2024 that its six-year deadline to sue started when it was injured, not when the rule was written.

Does the 21-Cent Cap Still Apply Today?

Assume you're paying the current cap until something formally replaces it. U.S. District Judge Daniel Traynor vacated Regulation II in August 2025. He then stayed his own order pending appeal, so debit fees wouldn't become a completely unregulated market overnight. The Fed appealed in October 2025, CU Today reported. None of the Oct. 26–27 coverage we reviewed reported any card network changing its regulated debit rates.

The Fed now has three broad paths. It can ask the full Eighth Circuit to rehear the case, ask the Supreme Court to take it, or start writing a new rule. American Banker reported that it wasn't immediately clear which the Fed would choose. A second case matters too. A Kentucky federal court upheld Regulation II in 2025. If the Sixth Circuit agrees, the two appeals courts would be in conflict, which is the usual route to the Supreme Court, Cato noted.

One point is easy to misread. Striking down a cap doesn't automatically produce a lower cap. Suppose the vacatur took effect before the Fed wrote a replacement. Large-bank debit interchange would then have no federal ceiling at all for a while. The district court's stay was meant to prevent exactly that gap, so "the cap is gone" is the wrong assumption for your budget.

How a Rewritten Cap Could Change Your Regulated Debit Costs

Today's regulated debit interchange rate is capped at 21 cents plus 0.05% of the sale. Issuers that meet the Fed's fraud-prevention standards can add one more cent. In October 2023, the Fed proposed cutting the base to 14.4 cents and adjusting the other pieces, according to CU Daily. That proposal was never finalized. A rule rewritten under the court's narrower reading of costs could land lower still, and America's Credit Unions warned that the cap could fall sharply. Nobody can price it yet.

Most of the cap is a flat per-transaction charge, so small tickets carry the heaviest load. The table below runs the math.

Sale amount	Cap today (21¢ + 0.05% + 1¢)	Share of sale	Illustrative base of 14.4¢	Share of sale
$5	$0.2225	4.45%	$0.1565	3.13%
$40	$0.24	0.60%	$0.174	0.44%
$100	$0.27	0.27%	$0.204	0.20%

Illustrative only. To keep it simple, the right-hand columns swap in the 2023 proposed base and hold the 0.05% and 1-cent pieces at today's levels, though the actual proposal changed those too. Figures cover interchange only, before network fees and processor markup.

Here's a worked example, also illustrative. Say a grocery market runs 6,000 regulated debit transactions a month at a $40 average basket. At today's cap, that's 6,000 × $0.24 = $1,440 a month in interchange. At a 14.4-cent base, it's 6,000 × $0.174 = $1,044, a difference of $396 a month ($4,752 a year).

A liquor store or convenience counter with $8 to $15 tickets would see a bigger percentage swing on each sale. In their Eighth Circuit amicus brief, merchant groups argued that issuers charge at the cap, not below it. If they're right, a lower ceiling should show up in real fees. For the full history of the proposal, see our explainer on the Fed debit fee cap and the Regulation II proposal.

Exempt Small Issuers, Routing Rules and What Stays the Same

The cap applies only to card issuers with more than $10 billion in assets. Debit cards from smaller banks and credit unions are exempt. The networks price those cards on their own rate tables, and the Oct. 26 ruling didn't touch them. If many of your customers bank at local institutions, a rewrite affects less of your volume. Our guide to regulated vs. unregulated debit shows how to tell them apart on a statement.

Routing is a separate part of Regulation II. Issuers must enable at least two unaffiliated networks on each debit card, and since July 1, 2023, that requirement covers card-not-present sales too. This case targeted the fee standard, so online merchants shouldn't expect their routing choices to disappear. Credit card interchange is also unaffected, because the ruling covers debit only.

Interchange-Plus vs. Flat-Rate: Who Actually Sees the Savings

Interchange is only one line in your costs. Your pricing model decides whether a cut reaches you.

On interchange-plus pricing, the processor passes interchange through at cost and adds a disclosed markup. When the regulated debit rate falls, your interchange line falls with it. That's the main reason heavy-debit businesses should look at interchange-plus pricing before a new rule arrives.

On flat-rate or tiered pricing, your rate is set in the contract. Take an illustrative flat rate of 2.6% + 10 cents. A $40 debit sale costs $1.14 whether the bank's interchange is 24 cents or 17. The processor keeps the difference unless your contract says otherwise or you renegotiate.

Merchant Action Plan: Audit Debit Mix, Renegotiate and Watch the Fed

Count your regulated debit. Pull three months of statements. Total the transactions and dollars on lines marked regulated or Durbin. If the labels are cryptic, our walkthrough on how to read a processing statement line by line can help.
Estimate your exposure. Multiply that count by the per-transaction math above at your own average ticket. The result is your stake in the rewrite.
Ask your processor in writing. Will a lower regulated debit cap show up on your statement, and from what date? Get the answer by email.
Check debit routing. For both in-store and online sales, ask whether debit goes over the lower-cost network when the card supports more than one.
Reprice if you're on flat-rate. Grocery, liquor and quick-service businesses with a heavy debit mix have the most to gain from pass-through pricing. You can request a free processing quote from MannyPay, and a specialist will respond within one business day.
Watch three dockets. Track the Fed's response, which could be a rehearing request, a Supreme Court petition or a proposed rule in the Federal Register. Also watch the Sixth Circuit's decision in the Kentucky case. If the Fed proposes a new rule, it will open a comment period, and merchants can file comments.

How Banks and Credit Unions May Push Back: Fees, Rewards and Lobbying

The banking side responded within hours. Six trade groups, including the American Bankers Association, the Consumer Bankers Association and America's Credit Unions, released a joint statement saying they were deeply disappointed. FMI and the Merchants Payments Coalition welcomed the decision.

Expect the bank side to press three arguments. The first is cost. Ann Petros, a vice president at America's Credit Unions, said throwing out the Fed's framework ignores the real operational and fraud-prevention costs of running a debit network. She added that the savings "are never passed along to consumers at the register," according to the group's statement on the ruling. The second is spillover. In the same statement, she argued that community institutions absorb the market fallout despite their exemption.

The third argument is about consumer pricing. If large issuers lose debit revenue, watch for higher checking fees, thinner debit perks and more pressure on customers to use credit cards. That last one matters to you, because credit cards generally cost merchants more than regulated debit. Our breakdown of debit vs. credit card processing fees covers the gap.

The policy fight also runs the other way. Cato has argued that Congress should scrap the Durbin price controls entirely, so the cap's future is unsettled in Congress too.

This week, count your regulated debit and get a written answer from your processor on whether savings will pass through. Then watch what the Fed files next. A rehearing request or Supreme Court appeal would push any savings further out. A proposed rule would finally put a number on the table.

This article is general information, not legal advice. Confirm how these developments affect your business with a qualified professional.

Sources

About the author

Adrian Reyes

Adrian Reyes is Senior Payments & Fintech Editor for Beyond the Swipe, covering credit card processing, merchant accounts, payment technology and processing fees.

This article is for general educational purposes and is not legal, tax or financial advice. Card network rules and state laws change; confirm current requirements for your business.