Career
Early Born in West Bengal, Debnath began his career with the Steel Authority of India before beginning his professional career at East Bengal of the National Football League, However, due to being at the same club as other, more reputable keepers such as Naseem Akhtar, Subrata Pal, and Abhra Mondal, Debnath found playing time hard to come by and thus he decided to sign for Air India Football Club of the I-League in 2008. After one season with Air India in which Debnath was the clubs #1 he decided to move back to East Bengal to try and cement more playing time, however, that was not meant to be and thus he re-signed for Air India before the 2010-2011 season. Despite starting in the clubs first seven league matches, Debnath had to miss the rest of the season after suffering an injury in a match against Pune F.C. in a collision with Mandjou Keita.
After recovering from his injury Debnath signed for Kenkre F.C. in the I-League 2nd Division for the 2012 season.
Then after that Debnath signed for newly founded club Mumbai Tigers for the 2012-2013 season. While with Tigers Debnath lead the club to the final of the 2012 Durand Cup where they lost to Debnath"s former club Air India.
Pune
On 31 July 2013 it was announced that Debnath had signed with Pune F.C. of the I-League for the 2013-2014 season.