ACI Worldwide has joined forces with US-based buy now, pay later (BNPL) fintech firm Affirm to help US merchants extend pay-over-time option to consumers.

The firm said that US merchants using its ACI Secure eCommerce can now allow customers to make purchases with Affirm. It will allow them to split the total charge of purchases into biweekly or monthly payments with no late or hidden fees.

Additionally, the merchants will benefit from ACI Secure eCommerce solution’s payments gateway, real-time fraud prevention capabilities and business intelligence tools.

Affirm chief revenue officer Geoff Kott said: “Merchants need to offer the right solutions to meet their customers’ needs and succeed in today’s market environment.

“Through this partnership, merchants using ACI’s Secure eCommerce solution can now easily integrate Affirm’s compelling offerings that help turn browsers into buyers while delivering greater flexibility at checkout with no gotchas or late fees.”

According to a recent report by Aite-Novarica Group, the BNPL market is expected to surpass $1.2 trillion by 2024.

Commenting on the development, ACI Worldwide head of merchant payments Debbie Guerra said: “With millions of consumers shifting their spending habits and looking for quick and convenient payment methods like buy now, pay later, we are excited to partner with Affirm to help drive conversion for merchants.

“Today’s consumers want payment alternatives and merchants need to keep up or get left behind. The partnership with ACI and Affirm makes it possible for merchants to meet these consumers where they are.”

In August this year, it was reported that American technology giant Apple is tapping Affirm’s PayBright to roll out a BNPL programme for its Canadian customers.

PayBright was acquired by the Canadian firm this January in a cash and equity deal worth nearly C$340m ($267m).