Preferential trade agreement

Also called: PTA · Topic: International Trade Policy, WTO and Intellectual Property · NCERT: Beyond NCERT

Meaning

A preferential trade agreement (PTA) is a deal in which two or more countries reduce, but do not remove, tariffs (import duties) on an agreed list of goods traded among themselves. Outsiders keep paying the normal duty.

It is the first and shallowest stage of economic integration in Bela Balassa's ladder (1961). Many deeper deals, such as FTAs, grow out of a PTA. So it helps explain how India's trade network was built.

Explanation

How a PTA works

• Partial tariff cuts only. Members cut duty on some goods. They do not remove duty on substantially all trade. Removing it would make the deal an FTA.
• Positive list. Only goods on the agreed list get the lower duty. Every other good pays the normal duty.
• Reciprocal. Both sides give concessions, so a PTA counts as a regional trade agreement (RTA) (any reciprocal trade deal notified to the WTO).
• Each member keeps its own outside tariff. There is no common external tariff (CET), meaning there is no single duty that all members charge on imports from non-members.
• Rules of origin are needed. Outside tariffs differ from member to member, so goods could be routed through the member with the lowest duty. This is called trade deflection. Only goods that really originate in a partner country get the lower duty.

Where the PTA sits: Balassa's stages (1961)

Each stage keeps everything in the stage before it and adds one feature:

Stage	What it adds
PTA	Tariffs reduced on an agreed list of goods
FTA	Tariffs removed on substantially all trade; each member keeps its own outside tariff
Customs union	+ common external tariff
Common market	+ free movement of labour and capital
Economic union	+ harmonised (made similar) fiscal, monetary and regulatory policies
Monetary union	+ common currency and a single monetary policy
Complete integration	+ a supranational authority (a body above national governments)

• Upgrade path. A PTA often becomes an FTA later. For example, SAPTA (1995) was followed by SAFTA (2006).

Legal basis in the WTO

• A PTA is discriminatory: partners pay less duty than other WTO members. This breaks the most-favoured-nation (MFN) principle, which says a tariff cut given to one member must be given to all members.
• GATT Article XXIV allows only customs unions and free-trade areas, where duties go on substantially all trade. A PTA only reduces duties on a list of goods, so it does not fit here.
• PTAs among developing countries therefore use the Enabling Clause (1979 Decision on Differential and More Favourable Treatment of developing countries). Examples are APTA and SAPTA [2].
• If a deal also covers services, a second notification is needed under GATS Article V [1].
• Since the end of 2006, all RTAs go through the WTO's Transparency Mechanism for RTAs, whichever route they are notified under [1].

Welfare effects: does a partial cut change anything?

Jacob Viner (1950) gave two effects:

• Trade creation: costly home production is replaced by cheaper imports from a partner, so welfare rises.
• Trade diversion: imports move from an efficient non-member to a less efficient partner only because of the duty preference, so welfare can fall.

Worked example (from our notes: India's tariff on outsiders = 25%)

Supplier	Cost	Price in India, no deal
Domestic	₹110	₹110
China (non-member)	₹80	₹100 ← bought
Vietnam (partner)	₹90	₹112.5

• PTA case (hypothetical: duty on Vietnam halved to 12.5%)
• Vietnam's price = ₹90 + 12.5% = ₹101.25.

• This is still above China's ₹100, so India keeps buying from China. There is no diversion, and trade does not change.

• FTA case (duty on Vietnam removed)

• Vietnam's price = ₹90, so India switches to Vietnam. This is trade diversion.
• The real cost to the world rises from ₹80 to ₹90.

• The government loses ₹20 per unit in customs duty.

• Lesson. A PTA's small preference margin (the gap between the normal duty and the preferential duty) causes less diversion. It also gives traders less reason to use the deal.

In India

• India's PTAs (tariffs cut, not removed):
• APTA: 1975, signed as the Bangkok Agreement. It was notified under the Enabling Clause [2].
• SAPTA: 1995. It was later deepened into SAFTA (2006).
• India–Chile: 2007, expanded in 2017.

• India–MERCOSUR: 2009.

• Rules of origin enforcement. CAROTAR 2020 (Customs (Administration of Rules of Origin under Trade Agreements) Rules, 2020) was notified on 21 August 2020 and came into force on 21 September 2020. It puts the burden of proving origin on the importer [3]. It applies to goods claiming lower duty under India's trade agreements.

• Utilisation. Indian exporters claim FTA preferences on only about a quarter of eligible exports. One reason is small preference margins. This problem is even sharper in a PTA, where duty is only partly cut.
• Direction of policy. India has moved from shallow PTAs to deeper deals:
• CEPAs with Korea (2010), Japan (2011) and the UAE (May 2022);
• India–EFTA TEPA, in force from 1 October 2025 [4];
• India–EU FTA, concluded on 27 January 2026, which makes the EU India's 22nd FTA partner [5].

Don't confuse with

• Free trade agreement (FTA): a PTA only reduces tariffs on a list of goods. An FTA removes tariffs on substantially all trade. APTA and SAPTA are PTAs. SAFTA and India–Sri Lanka are FTAs.
• Customs union: a PTA has no common external tariff and needs rules of origin. A customs union has one common outside tariff, so it needs no internal rules of origin.
• One-way (non-reciprocal) preferences: in a PTA both sides give concessions. In one-way preferences a rich country gives concessions and asks nothing back. These fall outside the Enabling Clause and GATT Art. XXIV, so they need a waiver backed by three-quarters of WTO members [2].
• Most-favoured-nation (MFN) tariff cut: an MFN cut must go to all WTO members. A PTA cut goes only to partners, so it is an exception to MFN.

Prelims Hooks

• Balassa order (1961): PTA → FTA → Customs union → Common market → Economic union → Monetary union → Complete integration. The PTA is the shallowest stage.
• A PTA reduces tariffs on an agreed list of goods. An FTA removes them on substantially all trade.
• PTAs among developing countries, such as APTA and SAPTA, are covered by the Enabling Clause (1979), not GATT Art. XXIV [2].
• India's PTAs: APTA (1975, Bangkok Agreement), SAPTA (1995), India–Chile (2007, expanded 2017), India–MERCOSUR (2009).
• Trap: SAPTA (1995) is a PTA, but SAFTA (2006) is an FTA.
• A PTA has no common external tariff, so it still needs rules of origin. CAROTAR 2020 (in force 21 Sept 2020) puts the burden of proof on the importer [3].

Mains Points

• A stepping stone or a trap? A PTA lets a developing country open up slowly and protect sensitive sectors. SAPTA (1995) grew into SAFTA (2006). But shallow, overlapping deals add to Bhagwati's spaghetti bowl effect:
• many deals, each with its own list and rules of origin;
• higher compliance costs for MSMEs;

• low use of preferences (about a quarter of eligible exports).

• Less trade diversion, but also less gain. A partial cut causes less trade diversion than full removal, so welfare losses are smaller. But the preference margin is also small, which gives exporters little reason to get certificates of origin. Simpler digital certificates and self-certification can raise utilisation.

• India's shift from PTAs to deep deals. India has moved from PTAs (APTA, SAPTA, Chile, MERCOSUR) to CEPA, TEPA and FTA deals with high-income partners (EFTA 2025, EU 2026) [4][5]. These deals cover goods, services, investment and IP. They offer more market access, but they also bring pressure on India's policy space (GS-II/GS-III).

Related concepts

• Stages of economic integration
• Free trade agreement
• Customs union
• Common market
• Economic union
• Monetary union
• Trading bloc
• Regional economic groupings
• Regionalism
• Open regionalism

Read more

• Regionalism: stages of integration, FTAs and rules of origin