India Set to Expand S-400 Fleet with ₹1 Lakh Crore Deal

Moscow talks yield positive progress on five additional air defence squadrons; boost follows Sindoor success

Five New S-400 Squadrons on Cards

India is moving forward with plans to procure five additional squadrons of the Russian S-400 air defence system in what officials describe as a major expansion of the country's air protection capability. Each squadron comprises eight launchers equipped with four missile containers apiece, translating to roughly 32 missiles per unit.

The procurement, when combined with the remaining deliveries from India's original 2018 contract, is estimated to cost around ₹1 lakh crore. Negotiations with Moscow have reportedly progressed positively, with a supply roadmap already in place.

Sindoor Validated the System

The push for additional S-400s follows the proven performance of existing units during Operation Sindoor last May. Between 7 and 10 May 2025, Indian S-400 batteries demonstrated striking capability by engaging targets up to 300 kilometres inside Pakistani territory. According to military assessments, the system neutralised 5-6 fighter jets and one reconnaissance aircraft while shutting down Pakistani air operations.

Sources familiar with the development said the operation provided crucial validation of the system's multi-layered interception capability—simultaneously engaging conventional aircraft while defending against ballistic threats. This real-world performance has strengthened the case for accelerated procurement.

First Deal Nearly Complete

India's original S-400 contract, inked in 2018 for ₹40,000 crores, covered five squadrons for the Air Force. Three have already been delivered to date. Defence officials confirmed that the remaining two squadrons from this initial order are expected to arrive within the next six months, following assurances from Moscow despite earlier delays linked to geopolitical circumstances.

The first squadron reached India in 2021 and was deployed across Punjab to counter threats from both Pakistan and China. A second unit arrived in July 2022 and was positioned in Sikkim along the Chinese border. The third consignment, delivered in February 2023, strengthened coverage of the western border across Rajasthan and Gujarat.

What Makes S-400 Formidable

The S-400 Triumph, operationalised by Russia in 2007, functions as a mobile air defence platform capable of engaging multiple threat categories simultaneously. A single system can track 160 targets at once and launch two missiles per target if required.

The system's radar can detect objects from 600 kilometres away. Once activated, it achieves operational readiness within five to ten minutes. Its 400-kilometre strike range—the figure from which it derives its designation—allows interception at altitudes reaching 30 kilometres. Hypersonic missiles travelling at Mach 15 fall within its engagement envelope.

Mobility is another defining feature. The entire system can be transported by road to different operational locations, providing strategic flexibility across India's geographically diverse borders.

Drone Defence Priority

The strategic imperative for expanded S-400 coverage has become sharper following Pakistan's drone offensive during Operation Sindoor. Pakistani forces deployed approximately 800 unmanned systems in just two hours on the intervening night of 7-8 May, creating what military planners now view as the emerging threat environment.

Retired Air Vice Marshal Sanjay Bhatnagar, who works on strategic planning matters, indicated that enhanced air defence—particularly against drone swarms—has become the Air Force's focus following the operation. He noted that China operates 4,000 satellites, of which 480 are dedicated to surveillance. India currently manages only six surveillance satellites for defence purposes, though a constellation of 52 is reportedly under development.

"We need major improvements in space-based surveillance," he observed, highlighting how the Service is calibrating its air defence posture beyond traditional aircraft threats.

Indigenous Shield Progressing

While augmenting foreign systems, India is simultaneously developing homegrown air defence capabilities. The Defence Research and Development Organisation (DRDO) is advancing Project Kusha, which encompasses three interceptor variants—M1, M2, and M3—with expected operational ranges spanning 105 to 350 kilometres.

The combined modernisation strategy reflects New Delhi's approach of blending proven foreign platforms with indigenous development to reduce long-term dependency and customise solutions to regional threat matrices.