The actor, who has not filmed a movie since last July, confessed that he needed some time away from the camera to focus on developing his production company.
"It felt good," Fassbender told Collider of his break.
"I needed to stop," he continued. "I needed to get some perspective.
"I had done six films back-to-back in 20 months, so it was like, 'Okay, take a break', and then the promotion thing kicked in and then I really wanted to make DMC, my production company, really work as opposed to just an idea and you've got to put a lot of time into that."
He went on: "So I really did focus energies in that, working with writers, finding the writers, and so now I go back to acting again."
> Prometheus premiere interviews: Michael Fassbender, Charlize Theron
Fassbender is scheduled to start work on Twelve Years a Slave in two weeks, his third collaboration with director Steve McQueen after Shame and Hunger.
Sherlock star Benedict Cumberbatch recently joined the cast of the McQueen film, which will also feature Brad Pitt, Chiwetel Ejiofor, and Paul Dano.