Before the start of the season, Bayern signed Xherdan Shaqiri, Dante, Claudio Pizarro, Mitchell Weiser, Tom Starke and Mario Mandžukić.

Bayern also added holding midfielder Javi Martínez after the first week of the Bundesliga season at the transfer deadline.

The club would end the season claiming the Treble, winning the Bundesliga, the UEFA Champions League and the DFB-Pokal.

[9] Takashi Usami,[10] Breno,[11] Rouven Sattelmaier,[11][12] Ivica Olić,[13] and Danijel Pranjić[11] left Bayern, Hans-Jörg Butt retired,[14] and Nils Petersen was loaned to Werder Bremen.

[18] On 2 July, the club announced that Matthias Sammer replaced Christian Nerlinger during UEFA Euro 2012.

[21] Bayern Munich CEO Karl-Heinz Rummenigge stated that the Bundesliga championship is the top priority for the club this season.

[22] During pre-season, Bayern defeated SpVgg Unterhaching,[23] FC Ismaning,[24] Trentino XI,[25] and 1.

[37] On 29 August, Karl Hopfner, Deputy Chairman of the Executive Board for Bayern Munich AG, announced he will leave the club on 31 December 2012 for health reasons.

[38][39] Karl Hopfner applied for managing director of the club in October 1982 after seeing a job ad for the position in the Süddeutsche Zeitung.

[43] Bayern won 6–1[43] through two goals from Thomas Müller and one each from Toni Kroos, Luiz Gustavo, Mario Mandžukić and Bastian Schweinsteiger.

[69] Bayern defeated Lekhwiya SC,[70] Schalke 04,[71] FC Basel,[72] and SpVgg Unterhaching[73] during the mid-winter break.

[74] Guardiola is set to over for the incumbent Jupp Heynckes on 26 June, the start of pre-season training for the 2013–14 season.

[86] Bayern Munich faced Fortuna Düsseldorf on 9 March,[87] winning 3–2[87] through Thomas Müller, Franck Ribéry and Jérôme Boateng goals.

[92] Xherdan Shaqiri, Bastian Schweinsteiger, Claudio Pizzaro, Arjen Robben and Franck Ribéry scored for Bayern.

[93] Toni Kroos tore his abductor muscle and was replaced by Arjen Robben in the 16th minute.

[95] With Bayern's victory, the 2012–13 Champions League season is the first time that two German clubs are in the semi-finals.

[95] Mandžukić controversially picked up a yellow card early in the match and is suspended for the first leg of the semi-finals.

[99] Bayern won 4–0 with goals from Jérôme Boateng, Mario Gómez, Rafinha and Xherdan Shaqiri.

[110] Barcelona players Sergio Busquets, Javier Mascherano, Carles Puyol and Eric Abidal were all out due to injury.

[110] Philipp Lahm, Bastian Schweinsteiger, Javi Martínez, Luiz Gustavo, Dante and Mario Gómez were all one yellow card away from being suspended for the 2013 UEFA Champions League Final.

and chairman of FC Bayern München AG, offered to step down on a temporary basis.

[116] Bayern Munich announced that executive board members Karl-Heinz Rummenigge and Andreas Jung have signed contract extensions.

[117] Rummenigge was given a three-year extension which is scheduled to expire on 30 December 2016 and Jung contract was extended by two years to 30 June 2016.

[117] In addition, Bayern also announced that Jörg Wacker will join the executive board on 1 July 2013.

[118] Martin Stranzl, Mike Hanke and Håvard Nordtveit scored for Borussia Mönchengladbach.

[124] The Brazilian Football Confederation (CBF) insisted that Dante and Luiz Gustavo report to the Brazil national team's training camp for 1 June at 16:00 local time.

[125] Under FIFA rules, clubs must let players report to national teams 14 days prior to the start of a tournament.

[127] Bayern CEO Karl-Heinz Rummenigge blamed FIFA, the CBF and the German Football Association (DFB).

[128] Notably, the Royal Spanish Football Federation did not enforce the rule for Javi Martínez and made the player available for the DFB-Pokal final.

Source: [138] Philipp Lahm, Manuel Neuer and Mario Gómez were nominated for the FIFA Ballon d'Or.