You pay little by little. You deduct a lot, a lot.
Bankinter leasing is a financial lease with an option to purchase which allows you to enjoy an asset in exchange for periodic instalment payments. The owner of the asset is the bank until, upon the contract's having been completed, the purchase option is exercised for the agreed upon price.
Leasing is a tool that allows you to pay in a manner which is comfortable and also to enjoy tax benefits.