It rarely happens. But it is a dream scenario for every living filmmaker: To make a film out of a few thousand dollars that goes on to earn millions at the box office. Remember it is not just the quality of a film that drives it to box-office success. There are other important factors like clever marketing, word-to-mouth publicity, awards attention etc. As you would notice in the below listed films that one or more of the just mentioned factors contributed to their massive box office success. With that said, here is the list of movies that made most money with least amount investment. Basically, these movies gave the with highest rate of return.
1. Paranormal Activity (2007)
Box Office: $193,000,000
It is the most profitable film ever made, based on return on investment. Director Oren Peli shot the film over seven days at his own house for $15,000. Originally developed as an independent feature and given film festival screenings in 2007, the film was acquired by Paramount Pictures and modified, particularly with a new ending. The film became a massive hit due to word of mouth publicly and some clever marketing campaigns done by Paramount Pictures.
2. The Blair Witch Project (1999)
Box Office: $248,000,000