In India, security details are provided to some high-risk individuals by the police and local government. Depending on the threat perception to the person, the category is divided into six tiers: SPG, Z+ (highest level), Z, Y+, Y and X. Individuals under this security blanket include (but are not limited to) the President, Vice President, Prime Minister, Supreme Court and High Court Judges, Service Chiefs of Indian Armed Forces, Governors of State, Chief Ministers and Cabinet Ministers, actors and other VIPs.
SPG is an elite force whose details are classified and only provided to the Prime Minister of India.
Budget Cost of 592cr/Yearly (FY 20–21)
Z+ category is a security detail of 36 personnel, including 10+ NSG commandos and police personnel.
Budget Cost of ₹3.96cr/Yearly
Z category is a security detail of 22 personnel, including 4-6 NSG commandos and police personnel.
Budget Cost of ₹1.92cr/Yearly
Y+ category is a security detail of 11 personnel, including 2-4 commandos and police personnel.
Budget Cost of ₹1.80cr/Yearly
Y category is a security detail of 8 personnel, including 1 or 2 commandos and police personnel.
Budget Cost of ₹1.44cr/Yearly
X category is a security detail of 2 personnel, with no commandos but only armed police personnel.
source: wikipedia
