Arsenal will land a windfall of £3million if Barcelona win the Champions League this season.
The Catalan giants take on Italian champions Juventus in the final in Berlin on June 6 and if they are victorious, the Gunners will profit handsomely.
Former Arsenal captain Thomas Vermaelen joined Barca last summer and in his contract there was a Champions League clause written.
Despite the fact Vermaelen is yet to feature for Luis Enrique's side because of injuries, Arsenal are due £3m if Barcelona win as part of the club-related bonus.