India-Iran Relations: From the 1979 Islamic Revolution to Chabahar and Beyond
With the death of Iran's Supreme Leader Ayatollah Ali Khamenei in a joint US-Israel military strike, India faces a profound reset in one of its most complex bilateral relationships.
India and Iran have maintained ties across decades despite Cold War alignments, sanctions regimes, and divergent strategic interests.
In May 2024, India signed a landmark 10-year agreement with Iran to develop and operate the Chabahar Port — a deal now in serious jeopardy given the collapse of the Iranian regime.
India's energy security is directly threatened: roughly 50% of its crude oil imports transit through the Strait of Hormuz.
India convened a late-night Cabinet Committee on Security (CCS) meeting as the crisis escalated, reflecting the severity of the strategic implications.
India-Iran Bilateral Relations: Historical Arc
India and Iran share civilisational ties going back millennia, but modern bilateral relations have been shaped by shifting geopolitical alignments. During the Cold War, India's non-aligned posture and Iran's membership in the Western-backed Central Treaty Organisation (CENTO) kept the two apart. The 1979 Islamic Revolution initially unsettled relations as India did not formally welcome the overthrow of the Shah, but ties stabilised and even deepened in the following decades as both nations found convergence on energy, Afghanistan, and Central Asia.
Khamenei's death and the regime's potential restructuring puts the 2024 Chabahar agreement, India's connectivity corridor to Central Asia, and the entire India-Iran strategic partnership at an inflection point.
Chabahar Port and the International North-South Transport Corridor (INSTC)
Chabahar Port, located on Iran's southeastern Makran coast on the Gulf of Oman, is India's gateway to landlocked Afghanistan and Central Asia — bypassing Pakistan entirely. It forms a critical node of the International North-South Transport Corridor (INSTC), a 7,200 km multi-modal trade route linking India to Russia and Europe via Iran.
Regime change in Tehran creates uncertainty about whether new Iranian leadership will honour the 2024 agreement. India's connectivity to Central Asia and Russia via INSTC depends entirely on a stable, cooperative Iran.
India's Strategic Autonomy and the West Asia Energy Equation
India's foreign policy doctrine of "strategic autonomy" — the modern conceptual successor to non-alignment — involves maintaining independent relationships with competing powers. West Asia is a critical test of this doctrine. India imports ~85% of its crude oil needs, with approximately 50% of crude and 60% of LNG transiting through the Strait of Hormuz (sourced primarily from Iraq, Saudi Arabia, UAE, and Kuwait). Iran has historically been both a supplier and a transit corridor.
Key Details
- FY2025: Nearly 50% of India's crude oil imports and 54% of its LNG imports were routed through the Strait of Hormuz.
- The strait's closure or disruption would directly threaten India's energy security.
- US sanctions post-2018 (JCPOA withdrawal) forced India to halt Iranian oil imports, replaced by discounted Russian crude.
- In early 2026, India imported approximately 2.6 million barrels per day from Gulf countries.
- India has faced pressure to reduce Russian crude imports under tightening US sanctions.
The Iran-Israel war has placed India in a difficult position — it must avoid antagonising the US-Israel bloc while protecting its energy lifeline through the Strait of Hormuz and preserving the Chabahar corridor.
Iran's Theocratic State Structure: Velayat-e Faqih
The 1979 Islamic Revolution replaced the Pahlavi monarchy with a theocratic republic based on the doctrine of Velayat-e Faqih (Guardianship of the Islamic Jurist). This system concentrates supreme political and religious authority in a single figure — the Supreme Leader — who holds lifetime tenure and outranks all elected institutions.
Key Details
- Supreme Leader: Appointed by the Assembly of Experts; controls armed forces (including IRGC), judiciary, state media.
- Guardian Council: 12 members (6 clerics appointed by Supreme Leader, 6 jurists nominated by judiciary); vets all legislation and electoral candidates.
- President: Elected directly, but executive powers subordinate to Supreme Leader.
- IRGC (Islamic Revolutionary Guard Corps): Parallel military force independent of regular army; reports directly to Supreme Leader.
- Khamenei was Supreme Leader since 1989 (following Khomeini's death); he was 86 years old at the time of his death.
Khamenei's death triggers a succession crisis within this structure. The Assembly of Experts must convene to elect a new Supreme Leader — a process with no established modern precedent and immense geopolitical consequences.
- Chabahar Port 10-year deal signed: May 13, 2024 (IPGL and Iran's Port and Maritime Organisation)
- Total Indian investment committed at Chabahar: ~$370 million (equipment + infrastructure)
- INSTC: Initiated September 2000; operationalised June 2022
- India's crude oil import dependence on Strait of Hormuz: ~50% of total crude, ~60% of LNG
- Iran's 1979 revolution: Ayatollah Khomeini returned from exile February 1, 1979; monarchy fell February 11, 1979
- Khamenei became Supreme Leader: 1989 (after Khomeini's death)
- Guardian Council: 12 members (6 clerics + 6 jurists); holds veto over legislation and candidates
- India-Iran Joint Commission: Established 1983