The film received mixed reviews from critics. Taran Adarsh of Bollywood Hungama rated the movie 3 out of 5 saying "Cash has all merits to strike a chord with the youth", praising Ajay Devgan's 'bravura' performance, the film's 'Hollywood style' look and action sequences, as well as the music. Noyon Jyoti Parasara of AOL India gave 3 out of 5 to the film saying, "once you are willing to let go off your beliefs and logic – like you really can’t jump off a cliff on your bike and remain unscratched – you would like the film."
Ankit Ojha from Planet Bollywood rated the movie 8 stars out of 10, stating that the movie, "has the global appeal of a slick action-thriller flick, and yet entices the Bollywood audience with its paisa-vasool experience". He gave a thumbs-up to Zayed Khan's performance, stating that, "Cash has literally put Zayed Khan on a completely new level. Never at once does he look uncomfortable doing any scene; he looks completely at ease throughout this. Whether it’s the stunts, the intimate scenes or the cool attitude, he doesn’t play the character here; he literally ‘is’ the character." He praised the movie and found it technically stoid, having a good screenplay by writer Yash Vinay and an equally "gripping" execution by director Anubhav Sinha.
On the other hand, Omar Qureshi of Zoom rated the movie 2.5 out of 5 saying, "The film is over the top and unrealistic." Indiatimes.com rated the movie 2 out of 5 stars saying, "The film has taken the audience for granted, which shows us gadgets hard to believe and futuristic and that such futuristic shows should be limited to Hollywood.". Subhash K. Jha gave the film 2 out of 5 stars, and said, "Cash wears its super-cool shirt with the slogan ‘Come Watch Me’ with a little bit too much aggression. But if you love popcorn crunching adventure stories watch Ajay Devgan play the hero from the hemisphere of hijinks." He praised Devgan's acting and the action sequences, saying that "To his credit Devgn carries off the ceaseless stint with the stunt with arresting aplomb[...]The expertly-executed stunts frequently see our hero jumping down high-rise buildings in breathtaking leaps of fate, with the camera pulling back in respectful awe."
According to Channel V, the film wears a bad look, has little good locations, but is 'nil' on the acting quotient. In their opinion, none of the heroines delivered performances worth even a mention. On the other hand, they did say that Ajay Devgan delivered a good performance. They also said that the action is beyond belief and is unreal.