Charges linked to your Credit card EMI: Everyone generally knows that the outstanding amount of the credit card must be paid till the due date. If you do not repay completely, you may have to pay huge interest. Sometimes this interest can be up to 42 per cent per annum. Apart from this, sometimes you may have to pay a huge amount as late payment penalty. But if you have made a big purchase with a credit card and are finding it difficult to repay the entire amount by the due date, then one solution is to convert the entire payment into EMI. The interest charged on such EMI is less than the interest that has to be paid if the entire amount is not paid. But do you know that apart from the interest mentioned in the credit card EMI, there is also an extra cost of 18%!