Boateng, 29, has been at Bayern since 2011, winning six Bundesliga titles and a Champions League to go with numerous other trophies.
The Germany international, who is contracted until 2021, appears to potentially be considering a move away from the Allianz Arena.
"I experienced everything at FC Bayern," Boateng told sports magazine 'Socrates'.
"So now I certainly reach a point, where I have to answer certain questions to myself: 'What goals do I have that I did not reach yet? Do I want to prove myself always at the same club and always under the same circumstances?'"
He added: "This is a question of personal challenges. It is not about classical career questions, but about questions for your life. Those are the questions that drive you on as a human being."
Boateng has only spent one season outside of Germany in his career – the 2010-11 campaign at Manchester City.
He has been linked with a return to City, as well as their rivals Manchester United.