The Mumbai Marathon ( known as the Tata Mumbai Marathon for sponsorship reasons Protest by Tata Consultancy Services ( TCS ) ) , is an annual international marathon Competition held in Mumbai , India , on the third Sunday of January every year .

This was the first marathon for which Tata Consultancy Services was the title sponsor .

In 2014 , Tata Consultancy Services , a multinational information technology ( IT ) service , consulting , and business solutions company headquartered in India , began Process_start an eight-year term as the title sponsor .