When you pay the minimum, you're only paying a small amount off your balance each month. By checking your latest statement, you'll be able to see how much interest you've been charged, and from paying the minimum, how much you're clearing from your balance.
The best way to decrease the amount of interest you're paying each month, is to increase your monthly payment, this will also reduce your balance quicker.
To view how paying more can help reduce your balance, you can use an independent calculator at www.cardcosts.org.uk as a guide. You'll just need your latest statement to hand, with your balance and current interest rate.
Try our Repayment Calculator to see how paying a little more can reduce the amount of interest you pay.