All three players have been punished for wearing clothes from another company than official club sponsor Adidas
The Bundesliga side's players are contractually obliged to wear Adidas clothes at official club activities - football shoes being the only exception to the rule.
However, both Gotze and Kirchhoff appeared at their official presentation on Tuesday wearing a t-shirt with a big Nike logo, leading to complaints from Adidas.
Bayern consequently offered their apologies to the company, only for Mario Gomez then to be photographed wearing a Nike hat at the club's training camp in Trentino.
The Champions League winners therefore opted to take action against the trio and have handed them fines, which will be donated to the victims of the recent floods in Germany.
No details have been disclosed about the amount of the fines, but all three players have accepted their punishment without further comment.