The clubs have agreed on a transfer.
The only thing missing is that Lewandowski must undergo a mandatory medical examination and sign the contract.
"We have agreed to release Robert Lewandowski.
We have a verbal agreement with FC Barcelona, but the contract is not yet completely clear, says Bayern Munich's CEO Oliver Kahn to the club's website.
The Catalan club also confirms that they agree on a transfer.
The 33-year-old striker thus leaves Bayern after eight years.
There were a total of 375 matches and 344 goals (as well as 72 assists) in the German big club.
In Munich, he won the German league eight times, the German Cup three times and a Champions League title in 2019.
The length of his contract with FC Barcelona is not yet known, but according to Spanish information, it is a four-year contract.