We are just days away from the hectic January transfer window opening in the Scottish Premiership and the rumours are already swirling.
It feels like just yesterday that Celtic were breaking their transfer record for Arne Engels and Rangers were beginning their rebuild under Philippe Clement in the summer, but with new year bells almost upon us, both clubs will be expected to be front and centre when it comes to this month’s biggest transfers.
But who makes the list of the most expensive January transfers ever made? Who have Scottish clubs spent the most on during the January transfer madness over the years?
Here are the 18 most expensive Scottish Premiership transfers ever made during the January transfer window:

17. Matt O'Riley - Celtic - £1.5million
One of Celtic's best ever January signings? The Danish midfielder was bought from MK Dons for just £1.5million, won just about everything and was sold for £26million to Brighton last summer - a huge profit. | SNS Group Photo: SNS Group

18. Nicolas Raskin - Rangers - £1.5million
Officially labelled as 'undisclosed', Rangers reported paid Standard Liege a reported £1.5million with a potential £500,000 in bonus for the young Belgian youth international. He's struggled to play regular football due to form and injury, but has made a positive impression this season after being given a run of games. | Getty Images Photo: Getty Images
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