Lakeshore Records will release the 400 Days Original Motion Picture Soundtrack digitally on May 6, 2016. The album features the film's original music by Wojciech Golczewski.

"This score was created to set the general mood and atmosphere, especially for the first half of the film," said Golczewski. "It's claustrophobic, dizzy and brings all that stuff that can happen while you're locked for so long in small space with few other people to the surface. That is what I tried to underline with the music."

400 Days is currently available on VOD and DVD.