When you make a reservation, there may be instances where the hotel will contact your credit (or debit) card company to confirm that the card you are using is valid and hasn’t been reported lost or stolen. At this time, they may also check to see if the card has enough money to cover the transaction. This is communicated in the form of a pre-authorisation of the full amount of your reservation.
The hotel, however, will not proceed with the charge. The time at which your card will be charged will depend on the terms and conditions linked to your booking.