Changing Apple Card Payment Plan

Stop your current Automatic Payment and then create a new one.

Set up automatic payments for Apple Card 

1. On your iPhone, open the Wallet app and tap Apple Card.
2. Tap the More button, then tap Autopay. 
3. 
4. Tap Continue.
5. To choose the amount that you want to pay, tap Monthly Balance, Minimum Payment Due, or Other Amount.

• • If you chose Monthly Balance or Minimum Payment Due, select when you want your payment to be made. Then tap Next.
  • If you chose Other Amount, select your payment amount, how often you want the payment to repeat, and when you want the first payment to be made. Then tap Next.

1. Confirm with Face ID, Touch ID, or passcode. Then tap Done.

To cancel Autopay, on your iPhone, open the Wallet app and tap Apple Card. Tap the More button, tap Autopay, then tap Cancel Autopay.

How to make Apple Card payments - Apple Support