Though Weisselberg, 75, is not expected to cooperate with Manhattan prosecutors in their larger probe into Trump himself, his plea will likely strengthen their case against the Trump Organization.
The trial is scheduled for October, and the Trump Organization has pleaded not guilty. Donald Trump has not been charged or accused of wrongdoing.
"This plea agreement directly implicates the Trump Organization in a wide range of criminal activity and requires Weisselberg to provide invaluable testimony in the upcoming trial," Manhattan District Attorney Alvin Bragg said in a statement. "We look forward to proving our case in court."
The Trump Organization did not immediately respond to a request for comment.
Prosecutors charged the company and Weisselberg in July 2021 with scheming to defraud, tax fraud and falsifying business records, saying some executives were paid "off-the-books."
Weisselberg was accused of concealing and avoiding taxes on $1.76 million of income.
This included rent for a Manhattan apartment, lease payments for two Mercedes-Benz vehicles, and tuition for relatives, with Trump signing the tuition checks.
