India–Nepal Relations: Diplomatic, Economic and Security Overview

India and Nepal share an enduring bond anchored in geographical proximity, shared cultural heritage, and open borders. Often described through the framework of Roti-Beti Ka Rishta (filial and matrimonial ties), bilateral engagement between the two South Asian neighbors spans historic treaties, economic interdependence, defense partnerships, and regional energy initiatives.

Foundational Framework and Diplomatic Architecture

1950 Treaty of Peace and Friendship

The bedrock of contemporary Indo-Nepal ties is the India-Nepal Treaty of Peace and Friendship, signed on July 31, 1950, in Kathmandu by Nepali Prime Minister Mohan Shamsher Jang Bahadur Rana and Indian Ambassador Chandreshwar Narayan Singh. The 10-article agreement affirms mutual recognition of sovereignty, territorial integrity, and independence. Articles 6 and 7 mandate national treatment on a reciprocal basis. Citizens of both nations enjoy equal privileges regarding residence, property ownership, business participation, and unrestricted movement across borders without visas or passports. Nepali citizens can enter public services in India, excluding top-tier cadres like the Indian Administrative Service (IAS), Indian Foreign Service (IFS), and Indian Police Service (IPS).

Historical Trade and Transit Treaties

Bilateral economic relations trace back to ancient texts like Kautilya’s Arthashastra, which cited Nepal as a exporter of woolen goods. Modern formal trade began with the 1923 British India-Nepal Trade Treaty. Post-independence, the relationship relies on separate Treaties of Trade and Transit:

• Treaty of Trade: Ensures duty-free market access to Indian markets for Nepalese manufactured goods on a non-reciprocal basis, subject to a 30% domestic value addition requirement.
• Treaty of Transit: Grants landlocked Nepal transit rights to third countries via designated Indian ports, notably Kolkata and Haldia. The revised 2023 Treaty of Transit incorporates access to India’s inland waterways.

Economic and Energy Cooperation

Trade and Investment Landscape

India is Nepal’s single largest trading partner, accounting for over two-thirds of Nepal’s total merchandise trade. India supplies petroleum products, iron, steel, machinery, and food grains, while importing electricity, soybean oil, spices, and synthetic yarn from Nepal. India constitutes approximately 33% of total Foreign Direct Investment (FDI) inflows into Nepal.

Cross-Border Hydropower and Energy Grids

Hydropower forms the core of economic integration:

• Power Trade Agreement: A bilateral pact targets exporting 10,000 MW of hydroelectricity from Nepal to India over a ten-year horizon.
• Trilateral Power Trade: Nepal exports power to Bangladesh through the Indian power grid, marking a precedent for South Asian energy integration.
• Flagship Hydro Projects: Includes the 900 MW Arun-III project, 490 MW Arun-IV project, and the West Seti Hydroelectric Project.
• Petroleum Infrastructure: The 69-km Motihari-Amlekhgunj pipeline, commissioned in 2019, represents South Asia’s first cross-border petroleum pipeline.

Defense and Strategic Security

Military-to-Military Ties

Nepal serves as a strategic buffer state along the northern Himalayan ridges. Military cooperation centers on equipment supply, training, and institutional links:

• Gorkha Regiment: Citizens of Nepal serve in dedicated Gorkha Battalions of the Indian Army. The Chiefs of Army Staff of both nations hold the honorary rank of General in each other’s armies.
• Exercise Surya Kiran: A joint annual military exercise focused on counter-insurgency, jungle warfare, and Humanitarian Assistance and Disaster Relief (HADR) operations.

Open Border Security Dynamics

The 1,850 km porous border spans five Indian states: Uttarakhand, Uttar Pradesh, Bihar, West Bengal, and Sikkim. While open borders facilitate movement, they introduce security risks, including human trafficking, counterfeit currency smuggling, drug trafficking, and cross-border movement of insurgents.

Connectivity and Cultural Infrastructure

Infrastructure Interventions

Connectivity upgrades center on Integrated Check Posts (ICPs) at Birgunj-Raxaul, Biratnagar-Jogbani, and Nepalgunj-Rupaidiha to streamline freight and passenger movement. Cross-border rail links include the Jaynagar-Kurtha broad-gauge line and the planned Raxaul-Kathmandu electrified railway.

Cultural Circuits and Sister-City Alliances

Deep-rooted religious links through Hinduism and Buddhism shape cultural diplomacy.

• Sister-City Agreements: Includes twinning of Kathmandu–Varanasi, Janakpur–Ayodhya, and Lumbini–Bodh Gaya.
• Pilgrimage Circuits: Joint development of the Ramayana Circuit (Ayodhya to Janakpur) and the Buddhist Circuit (Lumbini, Sarnath, Bodh Gaya).

Key Irritants and Bilateral Challenges

Boundary Disputes

Disagreements stem from varying interpretations of the 1816 Treaty of Sugauli, signed between British India and the Kingdom of Nepal, which established the Kali (Mahakali) River as the western boundary. Key contested areas include:

• Kalapani-Limpiyadhura-Lipulekh Tri-junction: Tensions escalated in 2020 after Nepal issued an updated political map incorporating the Kalapani region.
• Susta Area: Located along the Gandak River in Bihar, where river course shifts led to territorial claims.

Strategic Rebalancing and Revision Demands

Nepal’s foreign policy has sought balance by deepening ties with China under the Belt and Road Initiative (BRI) and expanding transit routes to reduce reliance on India. Domestically, political groups in Kathmandu frequently request revisions to the 1950 Treaty of Peace and Friendship, citing an asymmetrical framework.

Core Facts for Revision

• The Treaty of Sugauli (1816) demarked the boundary along the Kali River between British India and Nepal.
• The 1950 Treaty of Peace and Friendship was signed by Mohan Shamsher Jang Bahadur Rana and C.P.N. Singh.
• Nepal shares an open land border spanning 1,850 km across five Indian states: Uttarakhand, Uttar Pradesh, Bihar, West Bengal, and Sikkim.
• Surya Kiran is the joint annual military exercise between the Indian Army and the Nepalese Army.
• Motihari-Amlekhgunj pipeline was South Asia’s first cross-border petroleum pipeline.
• The 900 MW Arun-III project on the Arun River is among the largest Indian-assisted hydropower projects in Nepal.
• India and Nepal collaborate in South Asian regional groups including SAARC, BIMSTEC, and the BBIN initiative.