There is a little over 12 hours left for club's to get business done before the transfer window closes.
Which players will be the ones to arrive or depart? We've picked out a host of names who have been linked with moves, fallen out of favour at their clubs or are expected to be playing in new colours this season.
The forward has been largely unimpressive for Aberdeen this season and has interest from English League One side, including Sunderland and Ipswich Town.
It has been a struggle for the midfielder since arriving in Scotland. The Irishman has not acclimatised to the demands required. Could make a move back to England.
Sunderland are reportedly keen on signing Celtic's 61-goal forward who has fallen down the pecking order at Parkhead under Neil Lennon.
The left-back is expected to complete a switch to Celtic before the transfer window closes.
St Johnstone are on the lookout for a right-back after Richard Foster departed and have been linked with the Celtic defender.
Could move to Kilmarnock as part of the Greg Taylor deal.
The Kenyan's move to Club Brugge has fallen through, opening the door for a return to Celtic, on loan from Spurs.
Another who could play a part in the Greg Taylor to Celtic deal. Needs game time and could move on loan.
The 18-year-old Manchester City right-back could sign for Celtic today, following other young talents from England such as Luca Connell and Jonathan Afolabi.
Has been on the bench just once in the four league games for Hearts. Had a loan spell at Dunfermline and the club may look to get him experience elsewhere in the Premiership.
The striker wants to play regularly and has been linked with loan moves to St Johnstone and Kilmarnock, the latter are still in need of a forward. But it hinges on Hibs bringing in another body.
Expected to complete a move to Rotherham United on loan so to get regular football. Had some game time at Ibrox already this season but Steven Gerrard doesn't want the stunt the ex-Motherwell winger's growth by not playing him.
Could leave on loan as he steps up his recovery from injury. Rangers fans would like to keep him. A number of Premiership clubs would be interested.
Not in Steven Gerrard's plans. Spent time in England on loan last season. Would be a decent option for a number of clubs.
Rangers want to sell Grezda but have yet to receive a suitable offer for the Albanian. Could go right down to the wire.
Kilmarnock reportedly made an enquiry about he midfielder who is available from Rangers. He would add much needed craft to the Killie midfield.
Will likely return to England after he flopped at Ibrox.
Harvey St Clair
Reports in Italy suggest the Scotland U21 forward is set to leave Serie B side Venezia and join Kilmarnock.