The January transfer window opens on the first day of 2017 and clubs have one month to bring in new signings.
It closes at 11pm on January 31 - for both permanent and loan moves.
Pretty much every manager in the Premier League will be looking to strengthen - whether it's to climb away from the relegation zone or maintain a title charge.
Here, Profit Accumulator looks at what every Premier League club needs in January.
AFC Bournemouth transfer targets
The Cherries spent heavily in the summer and Eddie Howe has already admitted he does not foresee much activity in January.
The priority for Howe is keeping hold of striker Callum Wilson, who has been linked with Newcastle, West Ham and Everton.
They have also been linked with a permanent move for Nathan Ake, who has impressed during his loan spell on the south coast.
Linked targets: Nathan Ake, Jack Wilshere.
What Arsenal need in transfer window
There's a sense of deja vu at Arsenal, with Arsene Wenger's squad looking just short of title quality in many departments.
Centre-back, central midfield, centre-forward ... take your pick. Wenger has been linked with plenty of names, as he always is at this time of year, but whether he will splash the cash is another matter entirely.
Linked targets: Marco Reus, Cohen Bramall, Dimitri Payet, Christian Pulisic.
What are Burnley after in January?
Sean Dyche has always adopted a cautious approach to transfers and, a little like Bournemouth, it is not expected the Clarets will go big in the winter window after spending relatively liberally in the summer.
Joey Barton is back with the Clarets but there is doubt over his future after he was charged with betting offences.
If Barton is not available, another midfielder could be on Dyche's wishlist.
Linked targets: Robbie Keane, Luciano Narsingh.
Who should Chelsea sign?
Things are going pretty well for Antonio Conte, thanks very much, so the Italian might not be too keen to upset the applecart.
He does, however, have plenty of cash to splash after selling Oscar for a tidy sum of close to £50m.
Another solid midfielder or centre-back to cover the demands of the second half of the season might be welcome.
Don't be to surprised if a move is also made for another central striker, to help take the burden off Diego Costa.
Linked targets: Steven N'Zonzi, Franck Kessie, Federico Bernardeschi.
Crystal Palace January transfer targets
Big Sam's in charge now, just in time to smash up Palace's squad and replace them all with Kevin Nolan and Ivan Campo clones.
Only kidding. Palace's squad, on paper, looks pretty good after Alan Pardew was allowed to spend big in the summer.
Allardyce will, no doubt, want to make the squad his own, so expect some activity. Full-backs look to be weak areas and the Eagles have already been linked with Kieran Gibbs from Arsenal.
Linked targets: Kieran Gibbs, Jermain Defoe, Morgan Schneiderlin.
Who should Everton sign in January?
Everton are doing OK but not great so far this season and there are plenty of Toffees fans still to be convinced by manager Ronald Koeman.
He's on a big contract, so you would expect the Dutchman to be given at least one more transfer window to get things right.
Everton have some solid defenders and fantastic options going forward but arguably lack a steady central midfielder.
Gareth Barry is not getting any younger, so more quality in that department must surely be in Koeman's thinking.
Linked targets: Ademola Lookman, Morgan Schneiderlin, Julian Brandt, Anthony Martial, Wayne Rooney.
Hull City January transfer rumours
The Tigers are bottom of the table and their injury-ravaged squad is desperately short of numbers.
So Mike Phelan will probably take what he can get.
They are short on firepower, with Dieumerci Mbokani, Adama Diomande and rookie Jarrod Bowen as the only fit strikers. Abel Hernandez is on his way back but could also be on his way out, with Aston Villa stiffing around.
Right-back also remains an issue, with the club being forced to play 3-5-2 to accommodate wing-back Ahmed Elmohamady.
Linked targets: Jay Rodriguez, Ruben Loftus-Cheek, Carl Jenkinson, Ravel Morrison.
Who Leicester City should sign in January
Following up last season's heroics was always going to be a tall order for the Foxes.
But injuries and suspensions have made things harder than expected for Claudio Ranieri's close-knit group.
Midfielder Wilfred Ndidi is already on his way but Leicester are expected to bring in more new faces, with a centre-back and a striker among the top priorities.
Linked targets: Adrien Silva, Davie Selke.
Who will Liverpool buy in January?
Jurgen Klopp seems to be pretty happy with his flock at the moment, but they're by no means the finished article.
James Milner has done a great job at left-back, but it's not his strongest position. The Reds could also do with another quality centre-back, hence links with Virgil van Dijk.
Let's be fair, it's not often Liverpool go through a transfer window without buying someone from Southampton.
And then there's the goalkeeper. Neither Simon Mignolet nor Loris Karius have made the No1 jersey their own this season.
Linked targets: Jordan Amavi, Virgil van Dijk, Julian Brandt, Joe Hart.
Who are Manchester City going to sign?
After a bright start, things haven't gone quite to plan for Pep Guardiola.
His decision to swap Joe Hart with Claudio Bravo looks dubious to say the least and the players immediately in front of him - John Stones in particular - have looked vulnerable.
A centre-back must be high on City's wanted list but getting a good one is not easy, as City have found in recent seasons.
The full-back positions also need strengthening, with Gael Clichy, Bacary Sagna and Aleksandar Kolarov struggling for consistency.
Linked targets: Julian Weigl, Steven N'Zonzi, Jack Wilshere, Alex Sandro.
Manchester United January transfer targets
United have an abundance of riches in almost every position, but that hasn't stopped them throwing money around in recent windows.
Central midfield seems to be the position Jose Mourinho is most concerned with at the moment, with Morgan Schneiderlin and Bastian Schweinsteiger seemingly set for the exit door and a string of potential replacements being linked.
A star striker who is younger than Zlatan Ibrahimovic would also be welcomed.
Linked targets: Antoine Griezmann, Franck Kessie, Victor Lindelof, Nelson Semedo, Tiemoue Bakayoko.
Middlesbrough transfer rumours
Like Burnley, Boro have looked pretty solid upon their return to the top flight.
It would be surprising if Aitor Karanka made too many movements in the January transfer market.
With Jordan Rhodes seemingly out of favour, perhaps another striker to cover for Alvaro Negrado would be welcome.
Another quality attacking midfielder to help out Gaston Ramirez would also be useful.
Linked targets: Rudy Gestede, Emmanuel Agyemang-Badu.
Southampton transfer targets
With Charlie Austin set to be out for three to four months, a striker has to be the Saints' top target.
Southampton are hardly free flowing and have only Shane Long and Jay Rodriguez as senior striking options.
Linked targets: Moussa Dembele, Saido Berahino, Daniel Sturridge, Alexandre Lacazette.
Who will Stoke City buy in January?
Stoke have plenty of defenders. The trouble is, most of them are injured.
Mark Hughes has been happy to spend in previous windows since taking charge of Stoke and expect him to spend again.
Another centre-back, perhaps on loan, or even a full-back would bring welcome respite to the leaky Potters' defence.
There is also the future of Lee Grant to sort out, with the goalkeeper on loan from Derby.
Further forward, Stoke's attack could also be improved, with Hughes being forced to call on Peter Crouch for the first time in August in the defeat by Liverpool.
Linked targets: Saido Berahino, Leon Bailley, Soualiho Meite.
Sunderland transfer rumours
David Moyes has already been warned that the club have 'very limited' funds to spend in January.
Another striker to take the pressure off Jermain Defoe would be great but finding a quality option on a budget is easier said than done.
A winger to supply ammunition for Defoe is also essential, hence the constant link with Keisuke Honda.
Lamine Kone is off on Africa Cup Of Nations duty, so defensive reinforcements might also be needed.
Linked targets: Keisuke Honda, James McCarthy.
Who will Swansea buy?
Swansea's struggles resulted in Bob Bradley losing his job and his successor will certainly want to make changes during the window.
Defence is desperate for reinforcements, with the Swans still struggling to cope with the loss of Ashley Williams to Everton.
A defensive midfielder is also crucial, with Jack Cork, Ki Sung-Yeung, Leroy Fer and Leon Britton all having been tried in the role so far this season.
Linked targets: Tom Carroll, Steven Caulker, James Chester, Dimitar Berbatov.
Tottenham Hotspur transfer deals in January
Spurs are unlikely to have too much money to play with in January after Mauricio Pochettino was allowed to fill his boots in the summer.
Another attacking midfielder or winger in the mould of Christian Eriksen would be ideal.
Linked targets: Wilfried Zaha, Franck Kessie,
The Hornets have made an admirable start to the season but, when they've been bad, it's been worrying.
With Roberto Pereya out injured, another flair midfielder is needed. Another centre-back might also be an idea, with Miguel Britos and Younes Kaboul struggling for consistency.
Linked targets: Ashley Young, Henri Lansbury, Yacine, Brahimi.
West Bromwich Albion transfer targets
Good old Tony Pulis never lets you down. Albion are punching above their weight again in the table but Pulis has already revealed he's looking at 'four or five' targets in January.
A centre-forward is likely to be high on Pulis's shopping list - especially if Saido Berahino is finally sold.
Don't be surprised if a central midfielder is also recruited, with Morgan Schneiderlin a reported target from Manchester United.
Linked targets: Morgan Scheiderlin, Ronaldo Vieira, Fabian Schar.
West Ham United January 2017 transfer targets
But they all say that. The Hammers could do with extra quality all over the pitch but, perhaps most of all, they need a central striker just in case Andy Carroll gets injured again.
Linked targets: Martin Braithwaite, Nikola Kalinic, Alexandre Lacazette, Scott Hogan.