The last major US credit card not already signed up by Apple for its payment service will become available next week (16 September).

Both companies announced earlier this year that Discover’s customers in the US can use their credit and debit cards with Apple Pay from “this autumn” while not announcing a precise timeframe. Now, the date is set.

From 16 September to the end of the year, Discover cardholders who pay with their card using Apple Pay will earn a 10 per cent cashback bonus on up to $10,000 of in-store purchases, the firm said.

Discover customers will be able to make payments via the iPhone 6, 6 Plus and Apple Watch at the point-of-sale, as well as iPhone 6s and iPhone 6s Plus, upon availability.

The card firm has been slower than its rivals, including MasterCard and Visa, to join Apple Pay, which is curious given it was early to strike mobile payment deals with previous initiatives from PayPal, Google Wallet and Isis (later Softcard and now absorbed by Google Wallet).

In terms of signing up to Apple Pay, Discover’s users need to upgrade to iOS 9, then go to the Wallet app. If cardmembers already have a Discover card on file with iTunes, all they need to do is enter the security code, or they can choose to add a new Discover Card.