There are some situations where your custom amount might change. If it’s more than your credit card’s full statement balance, we’ll only charge you enough to cover your statement balance, so in this case your custom amount would be less. 

Here’s an example: You’ve chosen a custom amount of £25 but your statement balance for 1st – 31st July is £21.99. So we’ll only take £21.99 from your debit card for your automatic payment. 

If your custom amount is less than your minimum payment, we’ll take your minimum payment amount instead, so you avoid a £12 missed payment fee. 

Extra repayments made during the month won't affect the amount taken unless you owe less than the custom amount at the end of month.