While creating Banshee Chapter, Erickson was inspired by H. P. Lovecraft, From Beyond, as well as the history of hallucinogenic drug experiments performed by the United States Government.[4] Ted Levine was one of the first people cast for the movie, but casting the lead of Anne was more difficult and Erickson auditioned "several hundred" women before deciding on Katia Winter.[4] Erickson also experienced difficulty with the film's limited budget and filming timeline, as they only had 28 days to film Banshee Chapter.[4] As a result, some characters were eliminated from the beginning of the script in order to fit the limited shooting schedule.[4]