Amazon is considering discontinuing its association with Visa on its co-branded credit card in the United States, after announcing that it will cease accepting Visa-issued credit cards in the United Kingdom.

According to Reuters, the e-commerce giant is in negotiations with Visa, Mastercard, and American Express to examine its co-branded credit card arrangements.

If you routinely buy on Amazon’s online marketplace, you’ve probably noticed advertising for its Amazon Prime Rewards Visa Signature Card, which comes with a $200 Amazon Gift Card, if approved. In contrast to its Visa co-branded card, Amazon has a collaboration with American Express for its Amazon Business Prime American Express Card, which grants a $125 Amazon Gift Card instead of a Visa co-branded card.

According to Reuters, Amazon’s discussions with the three major credit card firms are part of the company’s routine procedure for assessing its co-branded credit card partnerships.

Credit card payment fees usually run from 1.5 to 3.5 percent of each purchase, making it tough for Amazon and other online merchants, as well as small businesses, to offer products and services to consumers at a lower cost.

In reaction to Visa’s progressively exorbitant fees, Amazon recently imposed surcharges on Visa credit card consumers in both Singapore and Australia.

While merchants have always had to cope with credit card companies’ processing fees in order to obtain access to their vast networks of customers, Amazon’s ongoing negotiations with Visa, American Express, and Mastercard indicate that this may be changing. Although the e-commerce giant may be considering its own payment method, it might also be leveraging its enormous user base to negotiate lower transaction costs with credit card firms.