The Tariff Commission (TC) performs governmental and quasi-judicial functions.

The Commission is the principal authority on tariffs and trade remedy measures. It investigates and recommends/decides on petitions for tariff modification and tariff classification. It is an independent adjudicatory body on trade remedy cases.

The Commission is a key adviser to the executive and legislative branches of government on tariff and related matters, promotes trade by providing recommendations on trade negotiating strategies and participating in policy dialogues and international trade negotiations, and is an advocate of industry competitiveness and consumer welfare.

The Commission is an attached agency of the National Economic and Development Authority. Under Republic Act 10863 (s. 2016), known as the “Customs Modernization and Tariff Act”, the Commission’s functions under Presidential Decree 1464 (s. 1978), also known as the “Tariff and Customs Code of the Philippines”, were updated and expanded.