Credit card repayment/interest question

I think you've made a mistake by making purchases on your balance transfer card.

I beg to differ. As long as he plans on paying off the £300 purchase amount in full. I use my card for paying off a kitchen on balance transfer, and also for petrol/food shopping. Making sure I pay off the purchases in full each month, (apart from this month where I fucked up and it cost me an extra £3) I have yet to pay any interest apart from the initial 1.5% balance transfer fee.

Payments to your account will reduce balances with the highest interest rates before those at lower rates, at the time the payment is applied. For full details on how we allocate payments, please refer to your terms and conditions.

Taken from my MBNA online account.

As Monster has said, if you want clarification give them a bell.

end.