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:

5. Alistair Johnston - Celtic - £3.5million
While the Canadian's transfer fee was never officially announced, it was understood the Scottish champions would pay an initial fee in the region of £3.5million for his services when he joined in January 2022. He's been a revelation since his arrival, and has already lifted six trophies in his time at the club. | SNS Group Photo: SNS Group

6. Thomas Buffel - Rangers - £3.2million
The Belgian attacker moved to Ibrox in January 2005 following a six year stint with Feyenoord in the Eredivisie. He won a league and League Cup double in his first six months with the club, His time at the club came to an end prematurely when a serious knee injury ruled him out for a number of months, before he moved back home to Belgium to sign for Cercle Brugge. Now retired, Buffel is the Belgium under-21 assistant manager. | Getty Images Photo: Getty Images

7. Nicolas Kuhn - Celtic - £3million
The German winger was a £3million January signing from Rapid Wien last year and took a while to get going. Returned in the summer with renewed vigour and has arguably been Celtic's stand out player this term. Has already been linked with £25million moves to Brentford and Fulham, due to his outstanding form in Glasgow. | Getty Images Photo: Getty Images

8. Eboue Kouassi - Celtic - £3million
The Ivorian midfielder cost Celtic a tidy sum of £3million when he joined from Krasnodar in January 2017. He struggled to make an impact in Scotland though, appearing just 22 times in his first three years with the club before being loaned and then eventually sold to Genk for a cut-price fee. He now play in Portugal for Arouca. | Getty Images Photo: Getty Images
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