Article 560 § 3 of the Civil Code

Article 560 § 3 of the  Civil Code: “The proportion of the price reduction to the contractual price should correspond to the proportion of the value of the defective item to the value of a non-defective one”.


Price reduction under warranty is not discretionarily specified by the buyer or the seller. It is necessary to determine the defect’s effect on the value of the item in question.


An example: A customer bought a pair of glasses with an anti-reflective coating, as declared by the seller. However, the declaration proved untrue. If the customer chooses to exercise their right to have the price reduced, it will be necessary to determine by how much glasses without an anti-reflective coating are cheaper. The difference will correspond to the percentage of the reduction in the price for the pair of glasses bought by the customer.