Amazon.com Inc. will allow eligible U.S. retailers using the online retail giant’s Amazon Pay service to offer Affirm Holdings Inc.’s buy now, pay later product under a new agreement between the two companies.

The service, known as Adaptive Checkout, offers biweekly and monthly payment options for purchases of more than $50 with annual percentage rates starting at zero, according to a June 7 statement. Millions of customers using Amazon.com and the Amazon mobile app already have access to the pay-over-time service, the companies said. Amazon Pay is the retailer’s payment service available to consumers on other ecommerce websites. Shoppers can use their Amazon accounts, with payment and shipping information, to shop on other websites.

More retailers are adding buy-now-pay-later services every year, and as of June 2023, 54.4% of Digital Commerce 360’s ranking of the Top 1000 online retailers offer some version of this payment type. That’s up from 45.8% of Top 1000 retailers in 2022 and 28.2% in 2020. Amazon first added Affirm in 2021. For comparison, BNPL is more common among retailers who also offer Amazon Pay, at 68.2%.

17.3% of retailers in the Top 1000 offer Amazon Pay.

The buy-now-pay-later option can increase sales and customer loyalty, and attract new customers, San Francisco-based Affirm said. The mattress-and-bedding company Casper and water-filter supplier USA Berkey Filters have already integrated Affirm’s offering within their use of Amazon Pay, according to the statement.

“Customers want more choice and flexibility when paying online,” Affirm president Libor Michalek said in the statement.

Amazon is No. 1 in the Top 1000. The database ranks North American web merchants by sales. Amazon is also No. 3 in the Digital Commerce 360 Online Marketplaces database, which ranks the 100 largest global marketplaces.

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