India-Nepal Relations: Open Border, the 1950 Treaty, River and Power Cooperation, Kalapani Dispute, the China Factor and Recent Political Change (UPSC Notes + PYQs)

Roots of a special relationship

Few borders in the world are as open as this one. Citizens of both countries cross without passports or visas, and Nepalis can live and work in India. Hindu and Buddhist pilgrim routes link Pashupatinath, Janakpur and Lumbini with Varanasi, Ayodhya and Bodh Gaya; families on both sides of the Terai intermarry, a bond often called roti-beti ka rishta. Gorkha soldiers have served in the Indian Army since 1947, and about 32,000 Nepali citizens serve in its Gorkha regiments, while many more draw Indian pensions.

The 1950 Treaty

The Treaty of Peace and Friendship of July 1950 gives citizens of each country national treatment in the other for residence, property, trade and work, and asks the two governments to consult on security threats. Many in Nepal see it as unequal, a relic of an India that feared Chinese expansion after Tibet. Since 2016 an Eminent Persons Group has prepared a report on revising it, but India has not yet formally received it.

Border and the Kalapani dispute

The border touches five Indian States: Uttarakhand, Uttar Pradesh, Bihar, West Bengal and Sikkim. The Sugauli Treaty of 1816 made the Kali (Mahakali) river the western boundary, but the two sides disagree on where the river begins. In May 2020, after India opened a road to the Lipulekh pass for the Kailash Mansarovar route, Nepal issued a new map claiming Kalapani, Lipulekh and Limpiyadhura and amended its Constitution to adopt it. India called the claim untenable. The open border also brings concerns about smuggling, trafficking and misuse by criminal and terror networks.

Rivers and hydropower

Nepal’s rivers feed the Ganga and have huge hydropower potential, but past treaties left a legacy of mistrust in Nepal.

Power trade has changed the story in recent years. Nepal now sells surplus monsoon electricity to India and, through Indian lines, to Bangladesh. A 2024 agreement aims for India to import 10,000 MW from Nepal within ten years. Indian firms are building projects such as Arun-III, and cross-border transmission lines are being added.

Trade and connectivity

Nepal is landlocked, so most of its trade passes through India, and India is its largest trade partner by far. The Motihari-Amlekhgunj petroleum pipeline (2019) was South Asia’s first cross-border oil pipeline. The Jaynagar-Kurtha railway (2022) and integrated check posts at Birgunj and Biratnagar ease movement, and the Mechi bridge links Panitanki with Kakarvitta. India funded rebuilding after the 2015 earthquake.

Strains: 2015 and after

When Nepal adopted its new Constitution in 2015, Madhesi groups of the Terai protested that it ignored them, and an “unofficial blockade” at border points cut fuel and medicine for months. Many Nepalis blamed India, and the episode pushed Kathmandu towards China. Since then Nepal has joined the Belt and Road Initiative (2017), signed transit protocols with China and accepted Chinese projects, though few have been built. The Agnipath scheme of 2022 led Nepal to pause Gorkha recruitment into the Indian Army. In September 2025 youth-led “Gen Z” protests brought down the government, and former Chief Justice Sushila Karki led an interim administration that called fresh elections.

Way forward

• Settle the 1950 treaty review through dialogue, and handle Kalapani through the boundary working group, not public rhetoric.
• Deliver projects on time: Pancheshwar, power lines and railways, so India’s word carries weight against Chinese promises.
• Expand power trade into a South Asian grid with Bangladesh and Bhutan.
• Respect Nepal’s sovereignty in domestic politics; engage across parties.
• Use shared Buddhist and Ramayana circuits for tourism and people-to-people ties.

Culture and pilgrim circuits

India’s Ramayana circuit links Ayodhya with Janakpur, Sita’s birthplace, and a Janakpur-Ayodhya bus service began in 2018. The Buddhist circuit links Lumbini with Bodh Gaya, Sarnath and Kushinagar, whose international airport opened in 2021. These shared sites give India soft power that China cannot easily match.

Uttar Pradesh and the border

Sonauli in Maharajganj district is the busiest crossing on the UP border and a key route to Lumbini. The Sashastra Seema Bal guards the open border with Nepal and Bhutan.

PYQ trend

Prelims tests border features, bridges, communities and BIMSTEC. Mains GS-II asks neighbourhood policy and China’s rise in South Asia.

India Nepal Relations: UPSC angle

India Nepal Relations UPSC PYQs (Prelims)

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Image: Luca Galuzzi (Lucag), Wikimedia Commons, CC BY-SA 2.5