The Asian Development Bank (ADB) has approved a loan of up to USD4.3 billion for the construction of the South Commuter Railway Project. The South Commuter Railway Project will be financed under a multi-tranche financing facility, with the first tranche of USD1.75 billion to be made available in 2022. The release of the second and third tranches is expected in 2024 and 2026, respectively.

ADB will finance civil works for the railway viaduct, stations, bridges, tunnels, and depot buildings. The project includes the construction of 18 stations and of a connecting tunnel to allow the operation of direct trains from Calamba to stations on the future Metro Manila Subway system.

The Japan International Cooperation Agency (JICA) will finance the purchase of rolling stock and the construction of the railway systems.

The South Commuter Railway Project is a part of the North–South Commuter Railway (NSCR) network. The suburban railway line will span 55 km and connect Metro Manila with the city of Calamba in the Philippines.