Merchants and banks across Illinois face a split reality starting July 1, 2026. The Office of the Comptroller of the Currency has declared that federal law overrides the state’s Interchange Fee Prohibition Act, freeing national banks and federal savings associations from compliance with a law designed to ban swipe fees on tax and gratuity portions of card transactions. With 24 days left before Article 150 of Illinois Public Act 104-0004 takes effect, the federal preemption order draws a sharp line: state-chartered institutions must follow the new Illinois rules, but federally chartered banks do not.
Why the OCC preemption order changes the game for Illinois merchants
The Illinois IFPA was written to stop card networks and issuers from collecting interchange fees on the tax and gratuity portions of a transaction. The law includes anti-circumvention language, a civil penalty structure, and merchant refund mechanics, all codified under Public Act 104‑0004. Its original effective date was 2025, but the Illinois General Assembly pushed it to July 1, 2026.
The OCC’s interim final order, however, strips the law of its reach over the largest banks operating in the state. According to the agency’s news release, national banks and federal savings associations are exempt because the National Bank Act grants them the authority to charge fees, even when those fees are set by a third party such as a card network. The practical result: a restaurant in Chicago that processes cards through a nationally chartered bank will still see interchange fees assessed on the full transaction amount, including tax and tip. A competitor using a state-chartered bank or credit union could see those fees reduced or eliminated on those portions.
This two-track system creates a testable prediction. National banks have a financial incentive to route Illinois debit transactions through processing channels that preserve higher interchange rates. If that shift happens, it should show up in future Call Report line-item data on fee income, broken out by state. Within 90 days of July 1, any measurable increase in out-of-state processing volume for Illinois transactions would signal that federally chartered institutions are actively capitalizing on the preemption gap.
What the OCC’s interim final rule and order actually say
The OCC took two distinct actions. First, it issued an interim final rule clarifying that national banks have the authority to charge certain fees even when those fees are determined by a third party, such as Visa or Mastercard. Second, it issued a separate interim final order specifically declaring that federal law preempts the Illinois IFPA. The agency’s compliance bulletin spelled out the bottom line in plain terms: national banks and federal savings associations “are neither subject to nor required to comply with the Illinois IFPA,” according to OCC Bulletin 2026‑17.
The OCC cited “imminent operational” concerns as part of its rationale, pointing to the confusion that would arise if federally chartered institutions had to retool systems for a state law the agency considers preempted. The agency grounded both actions in the National Bank Act’s long‑standing framework, which allows national banks to exercise incidental powers necessary to conduct the business of banking, including setting and collecting fees. In the OCC’s view, Illinois cannot selectively carve out tax and gratuity components from the base on which those fees are calculated when it comes to federally chartered institutions.
At the same time, the order is narrowly drawn. It does not invalidate the Illinois statute itself; it only bars its application to national banks and federal savings associations. State‑chartered banks, credit unions, and nonbank payment processors remain squarely within the law’s scope. That distinction leaves Illinois regulators with enforcement authority over a sizable segment of the market, while creating a competitive safe harbor for institutions operating under a federal charter.
Compliance choices and competitive fallout
For merchants, the immediate challenge is contractual rather than statutory. Payment acceptance agreements often bundle acquiring, processing, and routing decisions into opaque fee schedules. A merchant that wants to benefit from Illinois’ ban on interchange fees for tax and gratuity will need to confirm not only that its acquiring bank is state‑chartered, but also that downstream processors and settlement paths are configured to recognize the new statutory limits.
Some large retailers may respond by steering more volume toward state‑chartered partners willing to pass through the savings from the Illinois law. Smaller merchants, lacking negotiating leverage or technical support, could find themselves effectively stuck with the status quo if their payment providers rely on federally chartered banks that are now explicitly exempt. Over time, that divergence could translate into different effective card‑acceptance costs for businesses competing in the same neighborhoods.
For banks, the preemption order creates both opportunity and risk. National banks can market “no change” continuity to merchants worried about operational disruption, while state‑chartered institutions can pitch compliance with the Illinois fee limits as a way to lower merchants’ all‑in costs. Regulators will be watching for any attempts to use affiliate structures or routing tricks to blur those lines, particularly if fee disclosures to merchants remain dense and difficult to compare.
What to watch between now and July 1, 2026
In the final weeks before the law’s effective date, three signals will matter most. First, whether major payment processors update their pricing materials for Illinois merchants to reflect the state’s treatment of tax and gratuity. Second, how many community banks and credit unions publicly commit to honoring the state’s limits and build marketing campaigns around that stance. Third, whether national banks disclose any routing or pricing adjustments that could increase the share of Illinois transactions processed under federally preempted rules.
The OCC’s actions do not end the policy debate over interchange fees, but they ensure that Illinois will become a live experiment in split regulatory regimes. For merchants, the difference between a federal and state charter behind their card terminal could soon show up, line by line, on monthly processing statements.
David M. Keller is a finance writer based in Columbus, Ohio, covering personal finance and consumer-focused economic topics. He earned his degree in journalism from Ohio University and began his career reporting on local business and economic trends for a regional media outlet. Since then, he has contributed to a variety of online publications, focusing on clear, practical coverage of topics such as cost of living, debt, and everyday financial decision-making.
