According to reports, the Bronx rapper owes the IRS $718,038 in taxes on $3.7 million worth of income.
Fat Joe admitted in court that he did not pay taxes on on almost $4 million income between 2007 and 2010.
The Terror Squad rapper face up to 2 years behind bars. He is out on a $250,000 bail.
Fat Joe lawyer, Jeffrey Lichtman, said the rapper plans to pay up his back taxes by his sentencing hearing on April 3rd.