The theoretical convenience of the credit card has always amazed me. Today I will analyze and demonstrate to you why I think so. I've already talked about creditworthiness and how it affects things here in Europe as well. Payments and withdrawals are debited to the holder's current account at a later time. Generally on the 15th of the month following the day of the transaction. Credit cards have a monthly spending limit (ceiling) which varies according to the type (some cards may have no limit). It works like a credit line made available by the bank.