India is advancing with its initiative to acquire an additional five S-400 Triumf air defence systems from Russia. Moscow has already put forward a cost proposal, setting the stage for negotiations with New Delhi. The final go-ahead for this acquisition will depend on the Cabinet Committee on Security’s approval, once a price agreement is reached and the Finance Ministry gives its nod. As it stands, India is on track with its initial contract, signed in 2018 for $5.43 billion, which entails the delivery of five S-400 systems. The fulfillment of this contract is expected by November 2026, marking the delivery of the last system.
The acquisition of these additional air defence systems is anticipated to significantly bolster India’s defence posture, particularly in the eastern sector adjacent to China. The effectiveness of the S-400 was notably demonstrated during Operation Sindoor in May 2025, further justifying India’s push to expand its fleet of these systems. This operation underscored the system’s strategic value in safeguarding India’s airspace, reinforcing its operational case.
While the decision on the S-400 is progressing, India has yet to make a determination regarding the purchase of Russia’s Su-57 fifth-generation fighter aircraft. Despite the Indian Air Force showing interest in the proposal, especially in light of China’s deployment of J-20 stealth fighters in Tibet, no formal decision has been reached. This consideration reflects India’s broader defence strategy in response to regional military developments.
The potential acquisition of additional S-400 systems is expected to be a key topic in the broader India-Russia defence dialogues. These talks will coincide with Russian President Vladimir Putin’s scheduled visit to India for the BRICS summit set for September. The discussions are likely to explore various facets of the defence partnership between the two nations, with the S-400 deal being a prominent agenda item.