This is a list of Belgian football transfers for the 2013 summer transfer window. Only transfers involving a team from the Belgian Pro League are listed.
The summer transfer window will open on 1 July 2013, although some transfers took place prior to that date. Players without a club may join one at any time, either during or in between transfer windows. The transfer window ends on 2 September 2013, although a few completed transfers could still be announced a few days later.
After the end of the 2012–13 season, several players will return from loan to another club or will not have their contracts extended.[34] These will be listed here, together with other players for which the date is also not specified.
^Acheampong was already on loan from Buriram United to Anderlecht until the end of the 2012-13 season. Anderlecht chose to activate the clause that allowed them to complete a full transfer of Acheampong, paying 1 000 000 € to do so.
^Godeau was already on loan from Anderlecht to Zulte Waregem until the end of the 2012-13 season. Zulte Waregem chose to activate the clause that allowed them to complete a full transfer of Godeau.
^Hubert was already on loan from Anderlecht to Zulte Waregem until the end of the 2012-13 season. Genk, Gent and Hubert came to an agreement to make the transfer permanent.
^Thiaré was already on loan from CNEPS Excellence to Charleroi until the end of the 2012-13 season and the transfer was now made permanent.
^Coosemans was already on loan from Club Brugge to Waasland-Beveren until the end of the 2012-13 season. Both clubs agreed to make the transfer permanent.
^Conté was already on loan from Gent to Zulte Waregem during the second half of the 2012-13 season. Zulte Waregem chose to activate the clause that allowed them to complete a full transfer of Conté.
^Verboom was already on loan from Anderlecht to Zulte Waregem during the 2012-13 season. Zulte Waregem chose to activate the clause that allowed them to complete a full transfer of Verboom.
^Iandoli was on loan from Sint-Truiden to Újpest during the 2012-13 season. The loan ended and now Iandoli was loaned to Standard Liège.
^Tavares was on loan from Standard Liège to Estoril during the second half of the 2012-13 season. The loan ended and now Tavares was sold to Chievo.
^Roelandts was on loan from OH Leuven to Antwerp during the 2012-13 season. The loan ended and Roelandts was released to Maldegem.
^Perbet was already on loan from Mons to Villarreal until the end of the 2012-13 season. Villarreal chose to activate the clause that allowed them to complete a full transfer of Perbet.
^Gershon was on loan from Standard Liège to Celtic during the second half of the 2012-13 season. The loan ended and Gershon was sold to Waasland-Beveren.
^Hayen was on loan from OH Leuven to Antwerp during the 2012-13 season. The loan ended and Hayen was released to Dender EH where he became player-coach.
^Maman was on loan from Hapoel Haifa to Hapoel Tel Aviv during the 2012-13 season. The loan ended and Maman was sold to Waasland-Beveren.
^Trossard was on loan from Genk to Lommel United during the second half of the 2012-13 season. The loan ended, but Trossard was now loaned to Westerlo.
^Van Acker was on loan from Club Brugge to Beerschot during the second half of the 2012-13 season. The loan ended and Van Acker was sold to Cercle Brugge.
^Santini was on loan from Zadar to Freiburg during the second half of the 2011-12 season and the whole 2012-13 season. The loan ended and Santini was sold to Kortrijk.
^Remacle was on loan from Gent to Waasland-Beveren during the second half of the 2012-13 season. The loan ended and Remacle was sold to Lokeren.
^De Smet was on loan from Gent to Waasland-Beveren during the second half of the 2012-13 season. The loan ended and De Smet was sold to Kortrijk.
^Raman was on loan from Gent to Beerschot during the second half of the 2012-13 season. The loan ended but Raman was now loaned to Kortrijk.
^Neto was already on loan from Sporting to Gent during the second half of the 2012-13 season. The loan ended, but Gent and Sporting agreed to renew the loan deal, allowing Neto to spend another full season in Ghent.
^Vleminckx was on loan from Club Brugge to Gençlerbirliği during the second half of the 2012-13 season. The loan ended, but now Vleminckx was sold to Erciyesspor.
^Henkinet was on loan from Standard Liège to Dessel Sport during the 2012-13 season. The loan ended, but now Henkinet was loaned to Sint-Truiden.
^De Jonghe was on loan from Club Brugge to Zulte Waregem during the 2012-13 season. The loan ended, but now De Jonghe was loaned to Lierse.
^Pouga was on loan from OH Leuven to Lierse during the second half of the 2012-13 season. The loan ended, but now Pouga was sold to Ankaraspor.
^De Roover was already on loan from Lokeren to NAC during the 2012-13 season. Both clubs agreed to make the deal permanent.
^Marcq was on loan from Caen to Sedan during the 2012-13 season. The loan deal ended and Marcq was sold to Charleroi.
^Garcia-Calvete was already on loan from Anderlecht to De Graafschap during the 2012-13 season. Both clubs agreed to make the deal permanent.
^Boi was already on loan from OH Leuven to Cercle Brugge during the second half of the 2012-13 season. The loan and his contract with OH Leuven ended, allowing Boi to move to Cercle for free.
^Sterckx was already on loan from Anderlecht to Waasland-Beveren during the second half of the 2012-13 season. Both clubs agreed to make the transfer permanent.
^Zennaro was on loan from Standard to Waasland-Beveren during the 2012-13 season. The loan ended but now Zennaro was loaned to Fortuna Sittard.
^Kabananga was on loan from Anderlecht to Roeselare during the 2012-13 season. The loan ended and Kabananga was sold to Cercle Brugge.
^De Camargo was on loan from Mönchengladbach to Hoffenheim during the 2012-13 season. The loan ended and De Camargo was sold to Standard.
^Subašić was on loan from Olimpic Sarajevo to Dynamo Dresden during the 2012-13 season. He was now loaned to OH Leuven.
^Arbeitman was already on loan from Gent to Mons during the second half of the 2012-13 season. The clubs agreed top make the deal permanent.
^Ogunjimi was on loan from Mallorca to Beerschot during the second half of the 2012-13 season. Ogunjimi was now loaned to OH Leuven.
^Hazard was already on loan from Chelsea to Zulte Waregem during the 2012-13 season. Both clubs agreed to extend the loan deal.
^Yasser was on loan from Wadi Degla to Turnhout during the second half of the 2012-13 season. The loan ended and Yasser was sold to Lierse.
^Corstjens was on loan from Gent to Westerlo during the second half of the 2012-13 season. The loan ended, but now Corstjens was loaned to Lierse.
^Chavarría was on loan from Anderlecht to Kortrijk during the 2012-13 season. The loan ended and Chavarría was sold to Lens.
^Gunst was on loan from Club Brugge to Eendracht Aalst during the 2012-13 season. The loan ended and Gunst was sold to FC Eindhoven.
^Badibanga was on loan from Anderlecht to Charleroi during the 2012-13 season. The loan ended and Badibanga was sold to Ergotelis.
^De Zeeuw was already on loan from Spartak Moscow to Anderlecht during the second half of the 2012-13 season. The clubs agreed to extend the loan deal.
^Juhász was already on loan from Anderlecht to Videoton during the second half of the 2012-13 season. The clubs agreed top make the deal permanent.
^Serwy was on loan from Zulte Waregem to WS Woluwe during the second half of the 2012-13 season. The loan ended and Serwy was sold to Dortmund B.
^Veselinović was on loan from Anderlecht to Beerschot during the 2012-13 season. The loan ended and Veselinović was now loaned to Waasland-Beveren.
^Toudic was on loan from Lens to Reims during the 2012-13 season. The loan ended and Toudic was now sold to Zulte Waregem.
^Figueras was on loan from Club Brugge to Rayo Vallecano during the second half of the 2012-13 season. The loan ended and Figueras was now sold to Betis Sevilla.
^Čerimagić was already on loan from Gent to Eendracht Aalst during the second half of the 2012-13 season. The clubs agreed to extend the loan deal for another season.
^Botaka was on loan from Club Brugge to Belenenses during the 2012-13 season. The loan ended and Botaka was sold to Excelsior.
^Sandomierski was on loan from Genk to Blackburn Rovers during the 2012-13 season. The loan ended and Sandomierski was now loaned to Dinamo Zagreb.
^Malanda was on sold to Wolfsburg, but both clubs agreed to immediately loan him back out to Zulte Waregem until 1 January 2014.
^As part of the deal between Partizan Belgrade and Anderlecht, Mitrović will remain with Partizan Belgrade until completion of their matches in the play-off round of the 2013–14 UEFA Europa League.
^Molins was on loan from Anderlecht to Betis Sevilla during the second half of the 2012-13 season. The loan ended and Molins was sold to Malmö.
^Mareček was on loan from Anderlecht to Heerenveen during the 2012-13 season. The loan ended and Mareček was sold to Sparta Prague.
^Naudts was on loan from Cercle Brugge to Oudenaarde during the second half of the 2012-13 season. The loan ended, but Naudts was now loaned to Racing Mechelen.
^Diandy was on loan from Anderlecht to Charleroi during the 2012-13 season. The loan ended and Diandy was now sold to Mons.
^Vermeulen was on loan from OH Leuven to Antwerp during the 2012-13 season. The loan ended and Vermeulen was subsequently released by OHL, allowing him to sign for Waasland-Beveren without any transfer fee.
^Kabasele was on loan from Anderlecht to Torino during the second half of the 2012-13 season. The loan but now Kabasele was loaned to De Graafschap.
^Zhairi was on loan from Mechelen to Maccabi Haifa during the 2012-13 season. The loan ended but Zhairi was released.
^Aoulad was on loan from Anderlecht to Waasland-Beveren during the second half of the 2012-13 season. The loan ended but Aoulad was sold to Sint-Truiden.
^Hairemans was on already loan from Lierse to Turnhout during the second half of the 2012-13 season. The loan was renewed for another season.
^Bakenga was on loan from Club Brugge to Cercle Brugge during the 2012-13 season. The loan ended and Bakenga was now loaned to Esbjerg.
^Kennedy was on loan from Club Brugge to Beerschot during the second half of the 2012-13 season. The loan ended and Kennedy was now loaned to Westerlo.
^Koussalouka was on loan from Kortrijk to Boussu Dour during the second half of the 2012-13 season. The loan ended and Koussalouka was released.
^Vandenbroeck was on loan from Zulte Waregem to Antwerp during the second half of the 2012-13 season. The loan ended and Vandenbroeck was sold to Tubize.