Amitabh Bachchan has earlier requested BJP government to give an tax exemption. KFCC president Dr. Jayamala along with some directors had also sent a letter to CM requesting him for tax exemption for the movie. Karnataka Govt. has given 50 % tax exemption on the movie. Meanwhile Big B thanked state government for concession on entertainment tax.
Paa is the only film in the world featuring the father-son duo reversing their real-life roles for the screen. It's also the only instance of a 67-year old actor Amitabh Bachchan playing a 12-year old child and a 31-year old actress Vidya Balan playing mother to a 67-year-old actor.