Pavan Kumar (29) was found unconscious at Dilkusha guest house adjacent to Raj Bhavan on Friday with a bottle of pesticide, they said.
He was carrying a note which mentioned that "he was resorting to the extreme step depressed over not getting back his amount that was paid to a person in Kadapa," police said.
Kumar was immediately hospitalised after the incident and he succumbed today while undergoing treatment, Punjagutta Inspector Mohan Kumar said.
Pavan Kumar, in his note, had claimed that though he had complained to the police in Kadapa in this regard, no action was initiated to redress his grievance.