India is advancing its efforts to procure five additional S-400 Triumf air defence systems from Russia, with a cost proposal already submitted by Moscow to kickstart negotiations with New Delhi. The acquisition process is set to progress with a final decision anticipated from the Cabinet Committee on Security once pricing discussions are finalized and the Finance Ministry offers its approval. This move follows India’s existing contract signed in 2018 for five S-400 systems at a cost of $5.43 billion, with the delivery of the final system expected by November 2026.
The expansion of India’s S-400 fleet aims to bolster its air defence capabilities, particularly along the eastern sector adjacent to China. The system demonstrated its strategic value during India’s air defence operations in Operation Sindoor in May 2025, enhancing its reputation and reinforcing the argument for acquiring more units. The S-400’s performance in these operations has been a persuasive factor in India’s consideration of further investment in these advanced defence systems.
While the focus remains on the S-400 systems, India has yet to reach a decision regarding the purchase of Russia’s Su-57 fifth-generation fighter aircraft. Despite the Indian Air Force showing interest in this proposition, no commitments have been made, even as China continues to deploy its J-20 stealth fighters in the Tibet region. This ongoing evaluation reflects India’s cautious approach to balancing its air defence needs with its strategic priorities.
The discussions surrounding the proposed S-400 acquisition are expected to be a significant point of dialogue in broader India-Russia defence talks. These discussions will likely gain further momentum with Russian President Vladimir Putin’s upcoming visit to India for the BRICS summit scheduled for September. This visit could provide an opportune moment for both nations to strengthen their defence ties and finalize agreements that further their mutual interests in regional security.