The Tariff-Rate Quota (TRQ) is a two-tiered tariff structure, a trade policy concept that functions as a provision within international trade agreements, most notably the World Trade Organization (WTO) framework. The system allows a specified quantity of an imported product, the "in-quota volume," to enter a country at a low or zero tariff rate. Once imports exceed this quantitative threshold, a significantly higher "out-of-quota tariff" is applied to every additional unit, which is often prohibitive.
The TRQ originated during the 1986–94 Uruguay Round of the General Agreement on Tariffs and Trade (GATT) negotiations. It was created to solve the problem of non-tariff barriers, such as import bans and variable levies, which were common in agricultural trade. The WTO Agreement on Agriculture (AoA), which entered into force in 1995, mandated that member countries convert these non-tariff barriers into tariffs—a process called "tariffication"—and many of the resulting bound tariffs were structured as TRQs. This mechanism was intended to guarantee a baseline of market access, known as "minimum and current access commitments," while still offering protection to politically sensitive domestic producers.
The mechanism works by requiring countries to list the in-quota volume, the low in-quota rate, the high out-of-quota rate, and the administration method in their Schedules of Concessions. Administration methods for allocating the quota can be contentious and include "first-come-first-served," licenses on demand, or country-specific allocations. The TRQ connects directly to GATT Article XIII, which mandates non-discrimination in the administration of quantitative restrictions, a principle that was central to the ruling in the long-running EC – Bananas III dispute (DS27). While the core structure of the TRQ remains, its application has changed recently, with some countries eliminating them for certain products, such as the removal of TRQs for four agricultural products in Taiwan in 2005.