IPO Philippines is now as an International Searching Authority and International Preliminary Examining Authority (ISA/IPEA), enabling it to do search and preliminary examination of international applications filed under the Patent Cooperation Treaty (PCT).
Previously, Philippine residents applying for patents can only seek foreign IP offices to be their ISA/IPEAs to issue international search reports for their PCT applications. Search fees (USD1,000 for big entities and USD400 for small entities) and preliminary examination fees (USD500 for big entities and USD200 for small entities) are the most competitive among IP Offices in the region.
Source: https://www.ipophil.gov.ph/