On 15 July 2009, it was announced that Barcelona and Inter had reached an agreement, with Maxwell joining the Catalan club for €4.5 million plus €500,000.
Më 15 korrik 2009, u lajmërua se Barcelona dhe Inter kishin arritur një marrëveshje, me Maxwell që iu bashkua klubit katalantas për 4.5 milion €.