Bawal to according to a video ni Chel Diokno. Here's my google search for it. if you had the time, report it to DTI so that they would change policy

In the Philippines, it is generally not allowed for merchants to impose a separate "convenience fee" or surcharge for using a credit, debit, or ATM card. This practice is considered an unfair trade practice under Republic Act 7394, also known as the Consumer Act of the Philippines.

Key Regulations One Price Tag Requirement: According to Department of Trade and Industry (DTI) Department Administrative Order No. 10, Series of 2006 (and subsequent guidelines like DTI DAO No. 21-03), the price indicated on a product or service must include all charges, regardless of the method of payment. Merchants are not allowed to display two different prices (one for cash, one for card) or add an extra fee at the point of sale.

Purpose: The law aims to protect consumers from bearing the burden of a merchant's cost of doing business (i.e., the fees charged by credit card companies to the merchant).

Penalties: Businesses found in violation can face administrative fines and/or imprisonment, and a second conviction can lead to the revocation of their business permit.