India-Thailand relations are rooted in more than two thousand years of cultural contact, in which Buddhism, Hindu epics, Sanskrit and Pali vocabulary, court rituals and trade networks travelled across the Bay of Bengal and the Andaman Sea. A Thai king is still called “Rama”, the old Thai capital of Ayutthaya carries the memory of Ayodhya, and Bangkok’s international airport bears the Sanskrit-derived name Suvarnabhumi, meaning “land of gold”.
In modern times, the two countries are close neighbours across a maritime boundary in the Andaman Sea and partners in the Association of Southeast Asian Nations (ASEAN)-India framework, BIMSTEC and the Mekong-Ganga Cooperation. Thailand is regarded as a natural bridge in India’s Act East Policy, linking South Asia and mainland Southeast Asia. This explainer follows the long arc of the relationship from shared heritage to today’s trade, connectivity, defence and tourism ties.
Quick Facts
| Aspect | Detail |
|---|---|
| Diplomatic relations established | 1947, soon after India’s independence |
| Shared maritime boundary | Andaman Sea, delimited by agreements in the 1970s |
| Cultural link | Ramakien (Thai Ramayana), Theravada Buddhism, Brahmanical court rites |
| Trade pact | Early Harvest Scheme under the India-Thailand FTA framework, signed 2003 |
| Regional groupings | ASEAN-India, BIMSTEC (founded in Bangkok, 1997), Mekong-Ganga Cooperation |
| Connectivity project | India-Myanmar-Thailand Trilateral Highway, from Moreh to Mae Sot |
| Defence engagement | Exercise Maitree (army) and Indo-Thai Coordinated Patrol (navy) |
| Policy frame | Act East Policy and Thailand’s “Act West” outlook |
Civilisational and Cultural Roots
The earliest contacts between the Indian subcontinent and what is now Thailand were commercial. From the early centuries of the Common Era, merchants from the Bay of Bengal coast sailed to the Malay Peninsula and the Gulf of Siam in search of gold, spices and aromatic woods. Along with goods they carried ideas, and many scholars describe the Indianised kingdoms of mainland Southeast Asia, including the Dvaravati culture in present-day Thailand, as a product of this long exchange.
Language and script
Thai, although belonging to the Tai-Kadai family, contains a vast layer of Sanskrit and Pali vocabulary, especially in religious, royal and literary registers. Words for kingship, learning, temples and the calendar come from Indian sources, and the Thai script is distantly connected to Indic writing systems through the Khmer and Mon scripts. Thai royal names, place names and many personal names reveal the same inheritance.
Festivals and customs
Festivals such as Songkran, the Thai new year in April, and Loy Krathong, the festival of floating lamps, have been connected by scholars to Indian traditions of solar new year and river worship, though they have evolved distinct local forms. Indian classical dance and music influenced court performing arts in Thailand, and Brahmin priests of Indian descent continue to conduct royal ceremonies in Bangkok even in a predominantly Buddhist society.
The Ramakien and the Legacy of Ayutthaya
No cultural link is more visible than the Ramakien, the Thai retelling of the Ramayana. It is a national epic, performed in classical masked dance (khon), painted on the walls of the Grand Palace and Wat Phra Kaew in Bangkok, and recited in shadow-puppet theatre. While following the broad outline of the story of Rama, Sita and Ravana, the Thai version includes local episodes, characters and aesthetic styles.
Ayutthaya and Rama
Ayutthaya, the capital of the Siamese kingdom from the 14th to the 18th century, is widely understood to take its name from Ayodhya, the city of Rama in the Indian epic. The ruling dynasty of Thailand, the Chakri dynasty, uses the title Rama for its kings, who are numbered Rama I, Rama II and so on. The tradition places the monarchy within a cosmology that borrows from the Hindu idea of the divine king while remaining anchored in Theravada Buddhism.
Hindu shrines in Bangkok
Bangkok has several Hindu and Brahmin shrines popular with Thai Buddhists, including the Erawan Shrine, dedicated to Brahma, which attracts devotees and visitors daily. The Giant Swing and Devasathan temple near the old city are connected with Brahmanical rites. For many visitors from India, these familiar images in a Buddhist setting are an emotional highlight of travel to Thailand.
Buddhism as a Living Bond
Buddhism, born in the Gangetic plains, reached the region through monks and merchants and later became the dominant faith of Thailand in its Theravada form. This makes the Buddhist pilgrimage circuit of Bodh Gaya, Sarnath, Kushinagar, Lumbini and Rajgir a place of deep significance for Thai devotees. Thai temples have been built at several of these sites, and Thai monks and royal family members have regularly visited India.
Relics and pilgrimage diplomacy
India has used Buddhist heritage as a pillar of soft power, including sending sacred relics for public display in Thailand on special occasions, which drew large crowds of devotees. India has also promoted the Buddhist circuit as a tourism product and has worked to improve connectivity, airports and facilities around pilgrimage sites to welcome visitors from Thailand and other Buddhist countries.
Education and learning
- Thai students and monks study Pali, Sanskrit and Buddhist studies in Indian institutions, including the revived Nalanda University.
- Indian scholars and cultural bodies conduct programmes on Sanskrit, yoga and Indian classical arts in Thai universities.
- Thai royal family members have a tradition of scholarship in Sanskrit and engagement with Indian culture.
Diplomatic Relations and Political Dialogue
India and Thailand established diplomatic relations in 1947. In the Cold War years the two countries followed different security alignments, as Thailand was linked to Western treaty arrangements while India pursued non-alignment, so the relationship remained friendly but modest in economic and strategic content. The end of the Cold War and India’s economic reforms in 1991 changed this.
From Look East to Act East
India’s Look East Policy, launched in the early 1990s, identified Southeast Asia as a priority, and Thailand responded with its own “Look West” initiative. India became a sectoral dialogue partner of ASEAN in 1992, a full dialogue partner in 1995 and joined the East Asia Summit in 2005. In 2014, the policy was upgraded to Act East, with a stronger emphasis on connectivity, security and delivering concrete projects. In turn, Thailand has spoken of an “Act West” approach to reinforce ties with South Asia.
Institutional mechanisms
The two governments conduct dialogue through a Joint Commission on Bilateral Cooperation at the foreign-minister level, foreign office consultations, a joint trade committee and a series of sectoral working groups. High-level visits by prime ministers and the Thai royal family have elevated the relationship, and in recent years it has been referred to as a strategic partnership in official statements.
Trade, Investment and the FTA Story
Trade between India and Thailand has grown steadily since the 1990s, and Thailand is one of India’s significant trading partners within ASEAN. India exports items such as petroleum products, gems and jewellery, vehicles and components, machinery, iron and steel, and agricultural commodities; it imports electronics and electronic components, machinery, chemicals, plastics and automotive parts from Thailand.
The Early Harvest Scheme
In 2003, the two sides agreed on a framework for a bilateral Free Trade Agreement and signed an Early Harvest Scheme that reduced tariffs on an initial list of products, with the aim of building momentum for a comprehensive pact. The scheme was implemented from 2004 and remains a historic step, but negotiations for a full bilateral FTA have not been completed, and trade is now largely governed by the broader ASEAN-India Trade in Goods Agreement which entered into force in 2010.
Investment and business links
Indian companies in information technology, pharmaceuticals, auto components, steel, textiles and hospitality operate in Thailand, while Thai conglomerates in agribusiness, retail, energy and cement have invested in India. Thailand’s Board of Investment has promoted its Eastern Economic Corridor to Indian investors, and the industrial links between the Thai auto cluster and Indian manufacturers are growing.
| Category | Examples |
|---|---|
| Indian exports | Petroleum products, vehicles, gems and jewellery, machinery, steel, agricultural goods |
| Thai exports | Electronic components, machinery, chemicals, plastics, auto parts |
| Frameworks | Early Harvest Scheme (2004), ASEAN-India Trade in Goods Agreement (2010) |
ASEAN, BIMSTEC and Regional Frameworks
Thailand’s role as a founding member of ASEAN in 1967 makes it a key interlocutor for India in the regional architecture of the Indo-Pacific. Under the ASEAN-India partnership, the two countries engage in summit-level, ministerial and business forums, and Thailand is a consistent supporter of deeper India-ASEAN ties.
BIMSTEC
The Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation grew out of the Bangkok Declaration of 1997, initially as BIST-EC with Bangladesh, India, Sri Lanka and Thailand, and later expanded to include Myanmar, Nepal and Bhutan. For India, BIMSTEC offers a way to link South Asia and Southeast Asia without the political constraints that affect SAARC. The grouping adopted a charter in 2022 and has identified priority areas including connectivity, trade, security, energy and disaster management. Thailand’s role as the founding host and an active supporter has been consistent.
Mekong-Ganga Cooperation
Launched in 2000, the Mekong-Ganga Cooperation brings together India, Thailand, Cambodia, Laos, Myanmar and Vietnam to cooperate on tourism, culture, education and transport. Its name highlights the civilisational rivers that link the region, and the framework gives a platform for small development projects in addition to cultural exchange.
Connectivity: The Trilateral Highway and Beyond
Physical connectivity is the missing piece in an otherwise strong relationship. The flagship initiative is the India-Myanmar-Thailand Trilateral Highway, a road of roughly 1,400 kilometres planned to run from Moreh in Manipur through Myanmar, via Mandalay and Bagan, to Mae Sot in Thailand. Once complete, it would allow overland trade and tourism between India’s north-east and mainland Southeast Asia.
Status and challenges
Sections of the highway have been built or upgraded, including stretches built with Indian assistance in Myanmar, but completion has been delayed by construction challenges, funding and security conditions in the border areas, and political instability in Myanmar. Ideas to extend the road to Cambodia, Laos and Vietnam have been discussed as part of an East-West Economic Corridor concept.
Air, sea and digital links
- Air links: Direct flights connect many Indian cities with Bangkok, Phuket and Chiang Mai, making Thailand one of the most accessible foreign destinations for Indians.
- Sea links: Proposals for coastal shipping and ferry connectivity across the Bay of Bengal aim to link ports on India’s east coast with Thai ports.
- Payments: Efforts to link India’s Unified Payments Interface with Thailand’s real-time payment system aim to ease transactions for travellers and businesses.
Defence and Maritime Security Cooperation
India and Thailand share a maritime boundary in the Andaman Sea and have a common stake in the security of the Malacca Strait approaches, one of the world’s busiest sea lanes. Defence cooperation is therefore rooted in geography as much as in goodwill.
Exercises and patrols
The Indo-Thai Coordinated Patrol, known as CORPAT, has been conducted by the two navies twice a year since the mid-2000s along the maritime boundary to deter illegal fishing, piracy, smuggling and trafficking. The armies hold the Exercise Maitree, focused on counter-terrorism and operations in semi-urban and jungle terrain. Both navies also take part in the multilateral Milan exercise hosted by India, and the two countries have engaged in other regional exercises and training platforms.
Defence dialogue
Annual defence dialogue, training slots for officers, port calls and cooperation in disaster relief and humanitarian assistance form the rest of the portfolio. The relationship does not involve a formal alliance, but both sides value the role of maritime cooperation in supporting a free, open and rules-based Indo-Pacific.
Tourism, Diaspora and People-to-People Ties
Thailand is one of the most popular overseas destinations for Indian travellers, with beaches, temples, wellness and wedding tourism proving particularly attractive. Indians are among the largest groups of visitors to Thailand in terms of annual arrivals, and Thai authorities have periodically offered visa waivers or relaxations to encourage them. Thai tourists, in turn, visit India for pilgrimage, with Bodh Gaya and the Buddhist circuit featuring prominently.
The community of Indian origin
A community of people of Indian origin, including Punjabis, Sikhs, Gujaratis, Tamils and others, lives in Thailand and is engaged in textiles, trade, gems and hospitality. Bangkok’s Phahurat market, often called “Little India”, and Sikh gurdwaras in the capital are among the most visible landmarks. Many families have lived in the country for generations and have taken Thai citizenship, contributing to the economy and the cultural life of their adopted home.
Education, health and culture
Medical tourism, Ayurveda and yoga link the two countries, as do Bollywood films and Thai cinema. Cultural centres in both capitals organise festivals, language classes and dance performances. The Thai Princess Maha Chakri Sirindhorn has been a regular visitor to India and a champion of closer cultural understanding.
Challenges and Future Prospects
The relationship has no major bilateral disputes, but there is a gap between its potential and actual performance. Trade volumes lag behind the size of both economies, non-tariff barriers continue to complicate commerce, and the absence of a completed bilateral FTA has left businesses reliant on the broader ASEAN framework. Connectivity gaps, particularly in the north-east, constrain the full integration of supply chains.
Areas of opportunity
- Completing the Trilateral Highway and associated trade facilitation measures along it.
- Expanding cooperation in supply chains for electronics, automobiles and electric mobility.
- Building on the digital partnership through payment linkages and startup collaboration.
- Strengthening maritime domain awareness and cooperation in the Andaman Sea.
- Deepening Buddhist circuit tourism and cultural exchanges as an anchor of public diplomacy.
Conclusion
India and Thailand share a rare combination of ancient affinity and modern convergence. From the Ramakien in Bangkok’s palace murals to the Buddhist shrines of Bihar, the cultural bridge is already built. The task for policy-makers is to match it with roads, trade pacts, shipping lines and investment that bring everyday economic benefits to citizens, and to use platforms such as ASEAN and BIMSTEC to anchor stability in the wider Bay of Bengal region.
Frequently Asked Questions
What is the main cultural link between India and Thailand?
The links include Theravada Buddhism, Sanskrit and Pali vocabulary, Brahmanical court rituals and the Ramakien, the Thai version of the Ramayana. Even the name of the old capital Ayutthaya is traditionally linked to Ayodhya, and Thai kings of the Chakri dynasty carry the title Rama.
Do India and Thailand have a free trade agreement?
The two countries signed a framework agreement and an Early Harvest Scheme in 2003, which cut tariffs on an initial list of goods from 2004. A comprehensive bilateral FTA has not been finalised, so trade is mostly governed by the ASEAN-India Trade in Goods Agreement that came into force in 2010.
What is the India-Myanmar-Thailand Trilateral Highway?
It is a planned road of roughly 1,400 kilometres from Moreh in Manipur through Myanmar to Mae Sot in Thailand. It aims to enable overland trade and travel between north-east India and Southeast Asia, but completion has been delayed by construction and security challenges.
How do India and Thailand cooperate on defence?
The two navies carry out the Indo-Thai Coordinated Patrol along their maritime boundary in the Andaman Sea, and their armies hold the Exercise Maitree. They also hold regular defence dialogues, officer training and cooperation in disaster relief, without being formal allies.
What role does BIMSTEC play in India-Thailand ties?
BIMSTEC was founded through the Bangkok Declaration of 1997 and links South Asian and Southeast Asian countries around the Bay of Bengal. It gives India and Thailand a shared platform to cooperate on connectivity, trade, energy, security and disaster management.
Why is Thailand popular with Indian tourists?
Thailand offers direct flights from many Indian cities, a wide range of beach, wellness and cultural attractions, familiar Hindu and Buddhist heritage and, at times, relaxed visa arrangements. These factors make it one of the most visited foreign destinations for Indians.
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