Overview

• Indian government sources say additional S-400 batteries or the newer S-500 are under evaluation after the systems' use in May's Operation Sindoor.
• The 2018 $5.43 billion S-400 deal includes a follow-on clause that allows India to procure up to five more units at terms adjusted for inflation and exchange rates.
• Four S-400 units have been delivered to India, and Russian officials indicate remaining deliveries are planned by late 2026.
• A Russian embassy official says options for new S-400 and S-500 systems and Su-57 fighters are under consideration in India with talks described as advanced, though no new purchase has been announced.
• IAF chief Air Chief Marshal A. P. Singh has credited the S-400 with multiple long-range intercepts, including at roughly 300 km, bolstering its perceived value.