Pay-by-bank will be offered for online checkout at Walmart.com. Customers can already set up a profile and opt to use pay-by-bank as a payment option. Fiserv’s AllData platform connects with bank clients and vendors to link and authenticate consumer accounts.

Walmart (WMT) is reportedlyplanning to introduce an upgraded payment system next year that will give shoppers the option to pay directly from their bank accounts for online purchases. This bold move could potentially reduce fees for the retailer.

Walmart Inc. customers will soon have the option to pay directly from their bank accounts with instant transfers for online purchases. The enhanced feature is a flash point in the escalating tensions between merchants and the card networks setting the fees for payment processing.

By enabling instant settlement for bank payments at checkout, the retailer is adding speed to an option that reduces card transaction fees. But getting consumer buy-in may be a challenge.