American Express built a loyal, high-spending cardholder base in part by giving people a way to carry a balance without technically having a credit card. Its Pay Over Time feature – available on charge cards that historically required full monthly payment – became a quiet selling point for premium customers who wanted flexibility without the stigma of revolving credit. That positioning worked cleanly for years, because no network-level competitor offered anything comparable at scale.
Mastercard is changing that. Through its Installment product framework, the network has been rolling out buy-now-pay-later style functionality directly into the card infrastructure that banks already use, making it easier for issuers to offer flexible payment options without building separate loan products from scratch. The shift is subtle but the direction is clear: the installment payment edge that Amex cultivated as a brand differentiator is getting commoditized at the network layer.
What Mastercard’s Installment Framework Actually Does
Mastercard Installments works by embedding pay-over-time options inside existing card transactions. When a cardholder makes a qualifying purchase, they can convert it into a fixed payment plan – either at the point of sale or after the fact through their banking app. The mechanics run through Mastercard’s existing rails, which means the bank issuing the card doesn’t need to build a separate lending operation or acquire a fintech partner to offer the feature.
This is the part that matters strategically. Amex’s Pay Over Time relies on Amex being both the network and the issuer – the company controls the full stack. Mastercard’s model hands that same capability to any bank that issues Mastercard cards, which covers an enormous slice of the global credit card market. Chase, Citi, Barclays, and dozens of regional banks can now offer installment flexibility under their own branding, with Mastercard handling the infrastructure quietly in the background.
The product has been expanding gradually across markets. Some issuers are using it for large purchases above a set threshold, others are testing it across all transaction types. The flexibility of deployment is itself a competitive advantage – it lets banks tailor the feature to their customer segments rather than offering a one-size-fits-all version. Amex’s Pay Over Time, by contrast, operates within the constraints of Amex’s own product rules and cardholder agreements.
Why Amex’s Edge Was Always Narrower Than It Looked
Amex’s installment-style features have always been bundled with the broader value proposition of its premium cards – rewards, lounge access, concierge services, and a brand identity that appeals to status-conscious consumers. Pay Over Time was never the primary reason someone applied for a Platinum or Gold card. It was part of the package, a convenience feature that reinforced the idea that Amex cardholders get more options than ordinary credit card holders.
That bundling strategy works well when competitors can’t replicate the component parts. Once installment flexibility becomes a standard feature available through any major bank card, it stops functioning as a differentiator and starts functioning as table stakes. Cardholders who valued Pay Over Time but also wanted to consolidate on fewer cards now have less reason to keep an Amex specifically for that capability.
The Competitive Pressure Is Structural, Not Cyclical
Amex has navigated competitive pressure before – on rewards, on lounge access, on travel credits – and consistently found ways to reassert its premium positioning. The rewards arms race of the last decade largely ended with Amex holding its ground among affluent spenders, even as Chase Sapphire and Citi Premier clawed at the edges. But installment payment erosion feels different because it comes from the network layer itself, not from a rival issuer trying to out-benefit Amex product for product.
When a feature gets built into Mastercard’s infrastructure, it doesn’t require a competitor to run a marketing campaign against Amex. It just requires banks to turn on the capability and let it become normal. Cardholders don’t need to consciously switch allegiances – they simply discover that their existing bank card does something they previously associated with Amex, and the mental calculus around card choice shifts without any dramatic moment of decision.
There’s also a merchant dimension here. Merchants and their payment processors increasingly view installment options as a way to drive higher average order values, and they’re more likely to promote payment flexibility that works across multiple card networks rather than advocating specifically for Amex acceptance. As Mastercard’s installment framework expands merchant-side integrations, Amex could find itself in a position where its own flexible payment features are less visible at the point of sale than network-level alternatives.
Amex is not standing still. The company has been investing in its own merchant network expansion and exploring how to integrate more point-of-sale installment logic into its existing product lines. Its closed-loop network – where it acts as both issuer and acquirer for many transactions – gives it data advantages that open networks can’t easily replicate, and it continues to use that data to personalize offers in ways that pure network players cannot. The question isn’t whether Amex can adapt, but whether the Pay Over Time feature can retain any meaningful differentiation once every major bank card offers something functionally similar. For Amex’s best customers – the ones who hold both an Amex and a bank-issued Mastercard – the answer to that question will play out quietly, one payment plan at a time.
