In the ongoing struggle to balance consumer rights, market competition, and institutional accountability, the Durbin-Marshall Credit Card Competition Act has emerged as one of the most debated pieces of financial legislation in recent memory. Introduced by Senators Dick Durbin (D-IL) and Roger Marshall (R-KS), this bipartisan legislation proposes to require large credit card–issuing financial institutions to offer at least two network options for processing credit card transactions. In theory, the bill seeks to foster competition among credit card networks, reduce transaction fees for merchants, and ultimately provide relief to consumers. But like any effort to regulate an entrenched system, the act has triggered powerful opposition from financial institutions, particularly credit unions and community banks.
At its core, the legislation attempts to reintroduce market choice into an area long dominated by a duopoly. Today, Visa and Mastercard account for roughly 80% of the U.S. credit card market (Nilson Report, 2023). Merchants, regardless of size, have little say in which networks they must use or how much they are charged in interchange fees—those so-called “swipe fees” that can range from 1.5% to 3.5% per transaction. These fees are not trivial. For many small businesses, they represent the second-highest operational cost after labor. According to the Merchants Payments Coalition (2023), U.S. businesses paid more than $160 billion in credit and debit card fees in 2022 alone.
Supporters of the Durbin-Marshall Act argue that this bill would inject long-overdue competition into this stagnant ecosystem. If a merchant could choose between two unaffiliated networks, proponents say, it would pressure Visa and Mastercard to reduce fees, improve security protocols, and innovate on fraud prevention. Consumers, in turn, could benefit from lower retail prices and improved card security. Moreover, competition in network routing might increase transparency in the notoriously opaque world of payment processing.
Opponents, however, paint a much grimmer picture. Industry trade groups representing credit unions and community banks have come out in full force against the legislation. They argue that mandating multiple networks per card would impose technical burdens, undermine fraud protection, and eat into the already-thin margins of smaller institutions. The Credit Union National Association (CUNA, 2023) warns that it could reduce the viability of rewards programs—those coveted cash-back, airline mile, and points perks that many consumers enjoy. They also claim that similar measures from the 2010 Durbin Amendment on debit cards failed to deliver promised savings to consumers, instead consolidating power among the largest retailers.
These concerns are not entirely without merit. Any legislative mandate that disrupts existing payment infrastructure will come with implementation costs. Smaller issuers may face disproportionate pressure to upgrade their systems or renegotiate existing contracts. Moreover, it is true that the Durbin Amendment’s benefits were not evenly distributed. While large merchants saw significant savings in debit card interchange fees, many small businesses reported no measurable change in consumer prices (Evans et al., 2014). However, applying that outcome to the current bill oversimplifies the differences between debit and credit transactions, especially regarding fraud liability, credit underwriting, and consumer protections.
The Durbin-Marshall bill addresses a fundamentally different market problem. Unlike debit cards, which are tied directly to a consumer’s checking account, credit cards involve a more complex relationship among the issuer, the consumer, the network, and the merchant. Visa and Mastercard set interchange fee schedules that most financial institutions follow without deviation. Because of the limited routing options available, merchants are effectively locked into the network preferred by the issuing bank. This lack of choice drives up costs, particularly for smaller retailers who cannot negotiate lower rates.
Consider the implications for a family-run grocery store that accepts credit cards. The store must absorb the fees, often around 2% to 3%, for every transaction. On a $100 grocery bill, $2 to $3 goes to financial institutions—whether or not that store earns a profit on that sale. Multiply that by hundreds of transactions per day, and the impact on net revenue becomes significant. Unlike a major retailer such as Walmart, the local grocer cannot offset those fees with volume discounts or exclusive arrangements. That family-run business ends up subsidizing a system designed by and for the biggest players.
From a policy standpoint, the most important question is not whether this bill will inconvenience large card issuers but whether it will improve systemic fairness and competition. It is difficult to ignore the fact that the current system enables Visa and Mastercard to set fees with minimal competitive pressure. In most other industries, this kind of oligopoly would trigger antitrust scrutiny. Yet in the realm of credit cards, these practices are normalized.
Supporters of the bill also make a compelling case regarding transparency and innovation. At present, the routing of credit card transactions is opaque by design. Merchants often cannot determine which network is used or what fee structure applies until after the transaction is complete. By requiring the availability of multiple networks, the bill would compel the industry to disclose and compete more openly. Financial technology companies such as Square and Stripe have made similar arguments, pointing to increased innovation in debit processing since the Durbin Amendment forced debit card routing options over a decade ago (Payments Innovation Alliance, 2023).
There is also a strong equity argument in favor of the bill. Interchange fees function as a regressive tax on every purchase made with a credit card. Because these fees are passed onto consumers in the form of higher prices—regardless of how they pay—lower-income households bear a disproportionate burden. This is especially troubling given that many rewards programs disproportionately benefit wealthier cardholders who spend more and pay their balances in full each month. In essence, the current system redistributes wealth upward while hiding that transfer behind a veil of rewards and cashback points (Frank, 2022).
Yet even as opposition mounts, it is critical to question whose interests are truly at risk. The credit union and community bank lobby have positioned themselves as defenders of local institutions and rural borrowers. But data from the Federal Reserve shows that most credit card interchange revenue flows not to credit unions but to the nation’s largest banks—entities such as JPMorgan Chase, Citibank, and Bank of America (Federal Reserve, 2022). These institutions dominate the credit card market, and they are the ones most likely to see a reduction in fee revenue if the bill passes.
Furthermore, the notion that rewards programs will vanish under the bill is speculative at best. Card issuers in countries with lower interchange fees—such as Australia and the European Union—still offer rewards programs, though perhaps with fewer perks. The incentive to attract high-spending customers will remain strong, especially in a competitive lending environment. What may change is how these programs are funded and how their costs are distributed across the system.
To that end, the legislation includes carve-outs for smaller issuers. Banks and credit unions with less than $100 billion in assets are technically exempt from the routing mandate. Critics argue that these exemptions are illusory, citing the experience of the debit market post-2010. However, one could argue the problem lies not in the carve-out, but in its enforcement. Stronger regulatory oversight could ensure that these smaller institutions retain their flexibility while promoting routing options among larger issuers.
The bottom line is this: the Durbin-Marshall Credit Card Competition Act challenges a deeply entrenched and highly profitable system that has for too long escaped meaningful scrutiny. Opponents will continue to shout about harm to local banks and lost rewards points, but these arguments mask the bill’s true intent—to introduce competition, reduce consumer costs, and shine a light on an opaque and unfair marketplace. Small businesses deserve relief from runaway swipe fees. Consumers deserve transparency and choice. And our financial system deserves a dose of fair play.
Supporting this legislation is not an attack on banks—it is a demand for accountability. It is a step toward an economy where pricing power is not held hostage by two companies. The United States was built on the idea that competition drives innovation, efficiency, and equity. The Durbin-Marshall Act honors that legacy and should be passed into law.
References
Credit Union National Association. (2023). CUNA opposes credit card routing legislation. https://www.cuna.org
Evans, D. S., Chang, H. H., & Joyce, S. (2014). The impact of the U.S. debit card interchange regulation on consumer welfare: Evidence from survey data. Journal of Competition Law and Economics, 10(1), 1–25. https://doi.org/10.1093/joclec/nht025
Federal Reserve. (2022). Report on the profitability and fee structure of credit card issuing banks. https://www.federalreserve.gov
Frank, S. (2022). How credit card rewards quietly enrich the wealthy and burden the poor. Brookings Institution. https://www.brookings.edu
Merchants Payments Coalition. (2023). Statement in support of the Credit Card Competition Act. https://merchantspaymentscoalition.com
Nilson Report. (2023). U.S. market share of credit card networks. https://www.nilsonreport.com
Payments Innovation Alliance. (2023). Credit card routing competition: A necessary reform. https://www.electran.org/pia
