India Sri Lanka Relations

1. Introduction

India Sri Lanka Relations are rooted in a civilisational relationship spanning over 2,500 years, based on Buddhism, maritime trade, cultural exchanges and geographical proximity across the Palk Strait. As close maritime neighbours in the Indian Ocean, the two countries enjoy strong cooperation in trade, connectivity, defence, energy, development partnership and regional security. Sri Lanka occupies a central place in India’s Neighbourhood First Policy and MAHASAGAR (Mutual and Holistic Advancement for Security and Growth Across Regions) vision, while India remains one of Sri Lanka’s largest trading partners, development partners and investors.

In recent years, India Sri Lanka Relations have gained strategic importance due to expanding cooperation in maritime connectivity, energy, digital infrastructure, the Blue Economy and Indian Ocean security. At the same time, issues such as the Tamil question, fishermen dispute, China’s growing strategic presence, political and economic instability in Sri Lanka and connectivity challenges continue to shape the bilateral relationship. Strengthening mutual trust while effectively addressing these challenges remains crucial for ensuring peace, stability and prosperity in the Indian Ocean region.

These India Sri Lanka Relations BPSC Notes cover the major pillars of bilateral cooperation, key challenges and their strategic significance for India.

2. Pillars of India–Sri Lanka Cooperation

The major pillars of India Sri Lanka Relations include political and strategic cooperation, economic and development partnership, maritime connectivity, energy cooperation, defence and maritime security, cultural ties and regional cooperation.

Political & Strategic Cooperation

• Close Maritime Neighbours: India and Sri Lanka share a long-standing partnership based on civilisational ties, democratic values, maritime proximity and mutual strategic interests in the Indian Ocean. These factors form the foundation of India Sri Lanka Relations.
• Neighbourhood First & MAHASAGAR: Sri Lanka occupies a central place in India’s Neighbourhood First Policy and MAHASAGAR (Mutual and Holistic Advancement for Security and Growth Across Regions) vision, making it one of India’s most important maritime partners.
• High-Level Political Engagement: Regular visits by the Prime Ministers, Presidents and Foreign Ministers, along with mechanisms such as the Joint Commission, Foreign Office Consultations and Defence Dialogue, ensure continuous political engagement and help strengthen India Sri Lanka Relations.
• Support During Economic Crisis: During Sri Lanka’s 2022 economic crisis, India emerged as the first responder, extending assistance worth over US$4 billion through credit lines, currency support, fuel, food, fertilisers and medicines, reinforcing mutual trust.
• Strategic Significance for India: A stable, prosperous and friendly Sri Lanka is vital for India’s maritime security, Indian Ocean strategy, regional stability and Neighbourhood First Policy.

Economic, Trade & Development Partnership

• Major Economic Partner: India is one of Sri Lanka’s largest trading partners, major investors and largest development partners. Bilateral merchandise trade reached US$7.18 billion (FY 2025–26).
• Trade & Investment: The India–Sri Lanka Free Trade Agreement (ISFTA) (2000) has significantly boosted bilateral trade. Both countries are now working towards the Economic and Technology Cooperation Agreement (ETCA) to expand cooperation in trade, investment and services.
• Development Partnership: India has implemented numerous projects in housing, railways, healthcare, education, renewable energy, digital infrastructure, capacity building and cultural heritage restoration, particularly in the Northern and Eastern Provinces.
• Economic Assistance: During Sri Lanka’s economic crisis, India extended over US$4 billion in financial assistance, including Lines of Credit, currency support and humanitarian aid, helping stabilise the Sri Lankan economy.
• Strategic Significance for India: Strong economic ties promote regional stability, enhance India’s economic presence in the Indian Ocean and strengthen long-term strategic partnership.

Maritime Connectivity & Regional Integration

• Maritime Gateway in the Indian Ocean: Sri Lanka occupies a strategic location at the centre of the Indian Ocean, close to major Sea Lines of Communication (SLOCs) through which a significant share of global trade and energy supplies passes. This makes maritime connectivity the cornerstone of India Sri Lanka Relations.
• Port Connectivity: India is strengthening cooperation in the development and modernisation of key Sri Lankan ports, including:

• Colombo Port – One of South Asia’s busiest transshipment ports; nearly 60–70% of its transshipment cargo is India-related.
• Trincomalee Port – Strategically located deep-water natural harbour with potential for energy, logistics and industrial cooperation.
• Kankesanthurai (KKS) Port – Being developed to enhance connectivity with Tamil Nadu and Northern Sri Lanka.
• Ferry Services: India and Sri Lanka have revived maritime passenger connectivity through the Nagapattinam–Kankesanthurai Ferry Service. The proposed Rameswaram–Talaimannar Ferry Service will further strengthen tourism, pilgrimage, trade and people-to-people exchanges.
• Air Connectivity: Extensive direct flights connect Delhi, Chennai, Bengaluru, Hyderabad, Mumbai, Kochi, Madurai and Tiruchirappalli with Colombo and Jaffna, boosting tourism, business and educational exchanges.
• Energy Connectivity: Both countries are working on major connectivity initiatives such as the India–Sri Lanka Power Grid Interconnection, Multi-product Petroleum Pipeline, LNG cooperation and offshore wind energy projects in the Palk Strait, aiming to create an integrated regional energy market.
• Digital Connectivity: Cooperation has expanded into the digital sector with the launch of Unified Payments Interface (UPI)-based QR payments in Sri Lanka, alongside collaboration in Digital Public Infrastructure (DPI), fintech and digital financial services.
• Regional Connectivity: India and Sri Lanka cooperate through BIMSTEC, IORA and the Colombo Security Conclave to strengthen maritime connectivity, Blue Economy, disaster management, regional trade and security cooperation across the Indian Ocean.
• Strategic Importance for India:

• Enhances India’s role in the Indian Ocean Region (IOR).
• Secures critical Sea Lines of Communication (SLOCs).
• Strengthens connectivity between India’s southern coast and Sri Lanka.
• Supports the MAHASAGAR Vision and Neighbourhood First Policy.
• Counters external strategic influence in the Indian Ocean through deeper economic and connectivity partnerships.

Energy Cooperation

• Renewable Energy Partnership: India and Sri Lanka are expanding cooperation in solar energy, offshore wind energy, LNG and clean energy, supporting Sri Lanka’s energy transition and regional energy security.
• Key Projects: Major initiatives include the Sampur Solar Power Project, the proposed India–Sri Lanka Power Grid Interconnection, Multi-product Petroleum Pipeline and offshore wind energy projects in the Palk Strait.
• Energy Security: These projects aim to strengthen cross-border electricity trade, fuel security and regional energy integration, while reducing dependence on imported fossil fuels.
• Emerging Cooperation: Both countries are exploring collaboration in Green Energy, Green Hydrogen, energy storage and sustainable fuel technologies.
• Strategic Significance for India: Energy cooperation enhances energy security, maritime connectivity and India’s strategic presence in the Indian Ocean Region (IOR).

Defence & Maritime Security Cooperation

• Indian Ocean Security: India and Sri Lanka are key maritime partners in the Indian Ocean Region (IOR). Both countries cooperate to ensure a free, open, secure and rules-based maritime order, which is essential for regional peace and global commerce.
• Maritime Security Cooperation: Bilateral cooperation includes maritime domain awareness (MDA), intelligence sharing, coordinated naval patrols, search and rescue (SAR), anti-piracy operations, anti-smuggling measures, counter-terrorism and humanitarian assistance and disaster relief (HADR).
• Colombo Security Conclave (CSC): India and Sri Lanka are founding members of the Colombo Security Conclave, along with Maldives and Mauritius (with Bangladesh as an observer). The CSC promotes cooperation in maritime security, counter-terrorism, cyber security, transnational crime, trafficking and disaster management.
• Defence Exercises & Capacity Building: The armed forces and coast guards of both countries regularly conduct joint naval and coast guard exercises, training programmes, hydrographic surveys, officer exchanges and capacity-building initiatives, enhancing interoperability and mutual trust.
• Coast Guard Cooperation: Both countries coordinate to address illegal fishing, human trafficking, narcotics smuggling, arms trafficking, marine pollution and search-and-rescue operations in the Palk Bay and the Gulf of Mannar.
• Strategic Importance of Sri Lanka: Sri Lanka’s location near major Sea Lines of Communication (SLOCs) makes it critical for safeguarding maritime trade, energy flows and India’s southern maritime approaches. Close defence cooperation helps maintain strategic stability in the Indian Ocean and counters extra-regional security challenges.
• Strategic Significance for India:

• Secures India’s maritime interests in the Indian Ocean Region.
• Protects critical Sea Lines of Communication (SLOCs).
• Strengthens the MAHASAGAR Vision and Neighbourhood First Policy.
• Enhances regional maritime security and disaster response capabilities.
• Helps balance growing strategic competition in the Indian Ocean.

Development Partnership

India is one of Sri Lanka’s largest development partners, supporting housing, railway reconstruction, healthcare, education, digital infrastructure, renewable energy, cultural heritage restoration and capacity building. During Sri Lanka’s economic crisis, India provided over US$4 billion in assistance, reinforcing its role as Sri Lanka’s first responder and trusted development partner. Development cooperation remains an important pillar of India Sri Lanka Relations.

Cultural & People-to-People Relations

India and Sri Lanka share over 2,500 years of Buddhist and civilisational ties. Cooperation is strengthened through Buddhist pilgrimage, the Ramayana Circuit, tourism, ICCR scholarships, ITEC programmes, cultural exchanges, education and healthcare, fostering enduring people-to-people connections and mutual goodwill.

Regional & Multilateral Cooperation

• BIMSTEC: India and Sri Lanka cooperate through BIMSTEC in trade, connectivity, maritime security, energy, disaster management and the Blue Economy, strengthening links between South Asia and Southeast Asia.
• Indian Ocean Cooperation: Both countries actively participate in the Indian Ocean Rim Association (IORA) and the Colombo Security Conclave (CSC) to promote maritime security, counter-terrorism, disaster resilience, cyber security and a rules-based maritime order in the Indian Ocean.
• SAARC & Global Forums: India and Sri Lanka work together in SAARC, the United Nations and other multilateral forums on issues such as climate change, sustainable development, global health and peacekeeping.
• Strategic Significance for India: Regional cooperation strengthens India’s MAHASAGAR Vision, Neighbourhood First Policy, Blue Economy initiatives and leadership in the Indian Ocean Region (IOR).

These areas provide the core framework for India Sri Lanka Relations BPSC Notes, particularly for understanding India’s maritime, economic, security and neighbourhood interests.

3. Major Challenges in India–Sri Lanka Relations

Tamil Issue & Reconciliation

• Historical Background: The Sri Lankan Civil War (1983–2009) between the Sri Lankan government and the Liberation Tigers of Tamil Eelam (LTTE) was rooted in ethnic tensions between the Sinhalese majority and the Tamil minority. Although the war ended in 2009, issues of political reconciliation and minority rights remain unresolved.
• Indian Concern: India has consistently supported the unity, sovereignty and territorial integrity of Sri Lanka, while advocating a just, peaceful and lasting political solution that ensures equality, dignity, justice and constitutional rights for the Tamil community.
• 13th Constitutional Amendment: India supports the full implementation of the 13th Amendment to the Sri Lankan Constitution, which was introduced following the India–Sri Lanka Accord (1987). The amendment provides for devolution of powers to Provincial Councils, particularly in areas with significant Tamil populations.
• Post-War Reconciliation: India has contributed extensively to housing projects, railway reconstruction, healthcare, education, livelihood programmes and infrastructure development in Sri Lanka’s Northern and Eastern Provinces, aiming to promote rehabilitation and reconciliation.
• Political Sensitivity in India: The Tamil issue has significant domestic implications, particularly in Tamil Nadu, where concerns regarding the welfare and rights of Sri Lankan Tamils influence public opinion and occasionally India’s diplomatic engagement with Sri Lanka.
• Current Challenges: Progress on devolution of powers, functioning of Provincial Councils, accountability, human rights and political reconciliation has been slower than expected, and these issues continue to feature in bilateral discussions.
• India’s Approach: India follows a policy of constructive engagement, encouraging reconciliation through dialogue, democratic processes, development assistance and implementation of the 13th Amendment, while avoiding interference in Sri Lanka’s internal affairs.
• Strategic Significance for India:

• Ensures long-term peace and stability in Sri Lanka.
• Protects the interests and welfare of the Tamil community.
• Promotes regional stability in the Indian Ocean.
• Strengthens mutual trust and long-term India Sri Lanka Relations.

Fishermen Dispute & Katchatheevu Issue

• Core Issue: The fishermen dispute is one of the most persistent irritants in India Sri Lanka Relations. It primarily occurs in the Palk Bay and Palk Strait, where fishermen from both countries frequently cross the International Maritime Boundary Line (IMBL) while fishing.
• Katchatheevu Island: Katchatheevu is a small, uninhabited island in the Palk Strait that was transferred by India to Sri Lanka under the 1974 Maritime Boundary Agreement, followed by another maritime agreement in 1976. While the island remains under Sri Lankan sovereignty, the issue continues to be politically sensitive in India, especially in Tamil Nadu.
• Arrest of Fishermen: Sri Lankan authorities regularly detain Indian fishermen and seize fishing boats for alleged illegal fishing in Sri Lankan waters. These incidents periodically create diplomatic tensions and humanitarian concerns.
• Bottom Trawling: The widespread use of bottom trawling by some Indian fishermen has become the most contentious issue. This method damages marine ecosystems, coral reefs and fish breeding grounds, affecting the livelihoods of Sri Lankan fishermen and creating environmental concerns.
• Livelihood Concerns: Fishermen on both sides depend heavily on the rich fishing resources of the Palk Bay, making the dispute not only a security issue but also a socio-economic and humanitarian challenge.
• Institutional Mechanisms: India and Sri Lanka address the issue through the Joint Working Group (JWG) on Fisheries, regular meetings between Coast Guards, diplomatic dialogue and humanitarian measures for the early release of detained fishermen and fishing vessels.
• Way Forward: Both countries are promoting deep-sea fishing, sustainable fisheries management, alternative livelihoods, marine conservation, early release of fishermen, technology adoption and regular bilateral dialogue to achieve a long-term solution.
• Strategic Significance for India:

• Maintains cordial bilateral relations with Sri Lanka.
• Protects the livelihoods of Indian fishermen, particularly from Tamil Nadu.
• Promotes sustainable use of marine resources in the Palk Bay.
• Strengthens maritime security and stability in the Indian Ocean.

China’s Growing Strategic Presence

• Strategic Competition in the Indian Ocean: Sri Lanka has emerged as a key arena of India–China strategic competition because of its location near the major Sea Lines of Communication (SLOCs) in the Indian Ocean. Around 80% of global seaborne oil trade passes through the Indian Ocean, making Sri Lanka strategically significant for regional and global maritime security.
• Belt and Road Initiative (BRI): Sri Lanka is an important partner in China’s Belt and Road Initiative (BRI). China has financed several large infrastructure projects, including ports, highways, airports and urban infrastructure, substantially expanding its economic and strategic footprint.
• Hambantota Port: The Hambantota Port is the most prominent example of China’s presence in Sri Lanka. Due to debt repayment difficulties, Sri Lanka leased the port to China Merchants Port Holdings for 99 years in 2017. Although Sri Lanka maintains that the port is for commercial use, India views the long-term lease as having strategic implications for security in the Indian Ocean.
• Colombo Port City: China is developing the Colombo Port City, a large-scale financial and commercial hub built on reclaimed land under the BRI. The project is expected to strengthen China’s long-term economic influence in Sri Lanka and the wider Indian Ocean Region.
• Chinese Investments & Loans: China has become one of Sri Lanka’s largest infrastructure financiers, investing in ports, expressways, power projects, airports and urban development. This has increased Sri Lanka’s financial dependence on Chinese funding and raised concerns over debt sustainability.
• Strategic Concerns for India:

• Expansion of Chinese strategic infrastructure close to India’s southern coast.
• Possibility of dual-use facilities, where commercial ports could support future military logistics.
• Increased Chinese naval presence and surveillance activities in the Indian Ocean.
• Greater Chinese influence could reduce India’s traditional strategic space in Sri Lanka.
• Chinese Research & Surveillance Vessels: The visits of Chinese research and surveillance ships, such as Yuan Wang-5 (2022) and Shi Yan-6 (2023), to Sri Lankan ports generated serious security concerns for India because of their potential capability to monitor missile tests, satellite activities and naval movements in the Indian Ocean.
• India’s Response:

• Strengthening development partnership and economic assistance, including over US$4 billion support during Sri Lanka’s 2022 economic crisis.
• Expanding cooperation in energy, ports, connectivity, digital infrastructure and maritime security.
• Promoting projects such as the Trincomalee energy hub, power grid interconnection, Nagapattinam–Kankesanthurai ferry, UPI-based digital payments and renewable energy cooperation.
• Enhancing coordination through the Colombo Security Conclave, BIMSTEC and IORA.

Strategic Importance for India:

• Protects India’s maritime interests and the security of the Sea Lines of Communication (SLOCs).
• Supports the MAHASAGAR Vision and Neighbourhood First Policy.
• Prevents strategic encirclement under China’s “String of Pearls” strategy.
• Maintains a favourable balance of power in the Indian Ocean Region (IOR).
• Strengthens India’s role as the preferred security and development partner for Sri Lanka.

Political & Economic Instability in Sri Lanka

• Economic Crisis (2022): Sri Lanka faced its worst economic crisis since independence, marked by foreign exchange shortages, sovereign debt default, high inflation, fuel shortages and political unrest, leading to the resignation of President Gotabaya Rajapaksa.
• Impact on India: Economic instability affects trade, investment, connectivity projects, maritime security and regional stability in the Indian Ocean, while also creating opportunities for greater external influence.
• India’s Support: India emerged as Sri Lanka’s first responder, providing over US$4 billion in assistance through Lines of Credit, currency support, fuel, food, medicines and fertilisers, besides supporting Sri Lanka’s IMF debt restructuring process.
• Strategic Significance for India: A politically stable and economically resilient Sri Lanka is essential for India’s maritime security, Neighbourhood First Policy, MAHASAGAR Vision and long-term stability in the Indian Ocean Region (IOR).

Trade & Connectivity Challenges

• Trade & Investment Barriers: Despite the India–Sri Lanka Free Trade Agreement (ISFTA), issues such as non-tariff barriers, regulatory hurdles and delays in finalising the proposed ETCA continue to limit the full potential of bilateral trade.
• Project Implementation Delays: Slow progress in port development, energy connectivity, ferry services and infrastructure projects affects economic integration and investor confidence.
• Political Sensitivities: Domestic concerns in Sri Lanka over foreign investments and strategic infrastructure projects occasionally delay India-backed initiatives.
• Strategic Significance for India: Faster implementation of connectivity projects and deeper economic integration will strengthen regional connectivity, maritime cooperation, the MAHASAGAR Vision and the Neighbourhood First Policy, while reducing opportunities for external strategic influence.

Overall, these challenges are central to understanding India Sri Lanka Relations and are particularly important for aspirants using India Sri Lanka Relations BPSC Notes for BPSC Mains preparation.

4. Conclusion

India Sri Lanka Relations have evolved into a comprehensive partnership based on shared maritime geography, civilisational ties and mutual strategic interests. While cooperation in trade, connectivity, energy, maritime security and development partnership continues to deepen, challenges such as the Tamil issue, fishermen dispute, China’s growing strategic presence and economic instability require sustained dialogue and mutual trust.

By strengthening collaboration under the Neighbourhood First Policy, MAHASAGAR Vision, BIMSTEC and the Colombo Security Conclave, both countries can promote a secure, stable and prosperous Indian Ocean Region, while reinforcing India’s role as Sri Lanka’s preferred development and security partner.

For BPSC aspirants, these India Sri Lanka Relations BPSC Notes provide an integrated understanding of the strategic importance, areas of cooperation and major challenges shaping India’s relations with its important Indian Ocean neighbour.

BPSC Mains Practice Questions

Q1. India–Sri Lanka relations have acquired new strategic significance in the Indian Ocean Region. Discuss the major areas of bilateral cooperation and analyse their importance for India’s maritime and economic interests.

Q2. The Tamil issue, fishermen dispute and China’s growing strategic presence are the major challenges in India–Sri Lanka relations. Critically examine these challenges and suggest measures to strengthen bilateral ties.

Q3. Discuss the major pillars of India Sri Lanka Relations and examine their significance for India’s Neighbourhood First Policy and MAHASAGAR Vision.

Learn More from the Ministry of External Affairs, Government of India

Readers interested in India Sri Lanka Relations, including political cooperation, trade and investment, development partnership, connectivity, defence cooperation, cultural ties, the Tamil issue and India’s Neighbourhood First Policy, can visit the official website of the Ministry of External Affairs (MEA), Government of India. The MEA provides authentic and updated information on India Sri Lanka Relations, including the major areas of bilateral cooperation and India’s engagement with Sri Lanka.