MUMBAI, Jan. 15 -- Even as the country has close to 650km of operational Metro lines and hundreds of kilometers under construction, most Metro networks are facing heavy losses.

According to a recent study which looked at the latest available annual filings for FY18-19, Bengaluru, Chennai, Hyderabad, Gurgaon and Kochi Metros faced losses, with Chennai Metro alone facing net losses amounting to Rs.714 crore on its total income of Rs.183 crore, including on operations and other income.

Bengaluru, which is looking to expand its Metro network to 300km by 2025, earned a revenue of Rs.536 crore, but faced net losses amounting to Rs.498 crore, as per their annual report. Mumbai, which has only one operational line (11.5-km line connecting the sub...