He was speaking on the last day of the 16th Mumbai Film Festival, organised by the Moving Academy of Images (MAMI), in a session focusing on the marketing and box office trends in India.
"We had an interesting session on box office collections and the marketing strategy. As an actor I feel box office is not the only idea to make films. But as far as the collections are concerned, you see a huge disparity in the collections on each and every website," Arjun told reporters.
"So, we want one reliable source who will put up the accurate figures, which should be unbiased... We need information from one source about the box office (collections). If we check the collections of our films overseas, you see the accurate collections. But it doesn't happen here.
"So there has to be a legal and official way to put the awareness somewhere. It will take time. We have huge number of theatres, but hope within a year we get this thing going," added the star of films like "Ishaqzaade".
The 16th edition of the Mumbai Film Festival, which ends Tuesday, showcased over 185 films from more than 65 countries.
Talking about the festival, Arjun said: "As an actor I feel one should watch all kinds of films. This is the right platform to showcase different kinds of films."