This calculator will show you how much
interest you will end up paying if you make only the minimum required
payment on your credit card bill. It will also tell you how many
minimum payments you will make before your balance is paid off (up to
a maximum of 600 payments).
in your credit card disclosure statement the card company will tell
you something like "your minimum payment will be 2% of the
balance or £10, whichever is higher. These are the figures you
will enter in Column C and Column D respectively.