The January transfer window tends not to be as busy as its summer equivalent, but it is still easy for deals to pass you by.
To make sure you haven't missed anything since the start of the month, we've got every deal involving a Premier League club right here.
Arsenal
In: Cohen Bramall (Hednesford Town, £40,000)
Out: Chuba Akpom (Brighton & Hove Albion, Loan), Dan Crowley (Go Ahead Eagles, Loan)
Bournemouth
Out: Nathan Aké (Chelsea, Loan Recall), Callum Buckley (Aldershot Town, Loan), Emerson Hyndman (Rangers, Loan)
Burnley
In: Joey Barton (Rangers, Free)
Out: Danny Lafferty (Sheffield United, Undisclosed), Chris Long (Bolton Wanderers, Loan)
Chelsea
In: Nathan Aké (Bournemouth, Loan Recall)
Out: Mukhtar Ali (Vitesse Arnhem, Loan), Patrick Bamford (Middlesbrough, £6m), Izzy Brown (Huddersfield Town, Loan), Charlie Colkett (Swindon Town, Loan), Dion Conroy (Swindon Town, Undisclosed), Fankaty Dabo (Swindon Town, Loan), Jay Dasilva (Charlton Athletic, Loan), Islam Feruz (Swindon Town, Loan), Marco van Ginkel (PSV Eindhoven, Loan), Mikel John Obi (Tianjin TEDA, Free), Oscar (Shanghai SIPG, £60m), Fikayo Tomori (Brighton & Hove Albion, Loan)
Crystal Palace
In: Patrick van Aanholt (Sunderland, £10m), Jeffrey Schlupp (Leicester City, £12m)
Out: Keshi Anderson (Northampton Town, Loan), Freddie Ladapo (Shrewsbury Town, Loan)
Everton
In: Anton Donkor (Wolfsburg, Loan), Ademola Lookman (Charlton Athletic, £11m), Morgan Schneiderlin (Manchester United, £20m)
Out: Tyias Browning (Preston North End, Loan), Gerard Deulofeu (AC Milan, Loan), Antony Evans (Morecambe, Loan), Tom Cleverley (Watford, Loan), Russell Griffiths (Motherwell, Loan), Gethin Jones (Barnsley, Loan), Oumar Niasse (Hull City, Loan), Bryan Oviedo and Darron Gibson (Sunderland, £7.5m combined)
Hull City
In: Omar Elabdellaoui (Olympiacos, Loan), Evandro (FC Porto, Undisclosed), Markus Henriksen (AZ Alkmaar, £4.5m), Lazar Marković (Liverpool, Loan), Oumar Niasse (Everton, Loan)
Out: Jonathan Edwards (Accrington Stanley, Loan), Jake Livermore (West Bromwich Albion, £10m), Allan McGregor (Cardiff City, Loan), Harvey Rodgers (Accrington Stanley, Loan), Robert Snodgrass (West Ham United, £10.2m)
Leicester City
In: Wilfred Ndidi (KRC Genk, £15m)
Out: Harvey Barnes (MK Dons, Loan), Luis Hernández (Málaga, £1.75m), Matty James (Barnsley, Loan), Jeffrey Schlupp (Crystal Palace, £12m)
Liverpool
Out: Pedro Chirivella (Go Ahead Eagles, Loan), Tiago Ilori (Reading, £3.75m), Lazar Marković (Hull City, Loan)
Manchester City
In: Gabriel Jesus (Palmeiras, £27m)
Out: Angeliño (Girona, Loan), Manu Garcia (NAC Breda, Loan), George Glendon (Fleetwood Town, Undisclosed), Pablo Maffeo (Girona, Loan), Billy O'Brien (St Mirren, Loan), Bruno Zuculini (Hellas Verona, Loan)
Manchester United
Out: Sean Goss (Queens Park Rangers, Undisclosed), Sam Johnstone (Aston Villa, Loan), Memphis (Olympique Lyonnais, £16m), Joe Riley (Sheffield United, Loan), Morgan Schneiderlin (Everton, £20m)
Middlesbrough
In: Patrick Bamford (Chelsea, £6m), Rudy Gestede (Aston Villa, £6m), Mikael Soisalo (Ilves Tampere, £170,000)
Out: Mark Kitching (Rochdale, Loan), Tomás Mejías (Rayo Vallecano, Loan), Bryn Morris (Shrewsbury Town, Undisclosed), Emilio Nsue (Birmingham City, £1m), David Nugent (Derby County, £2.5m), Carlos de Pena (Real Oviedo, Loan), Julien de Sart (Derby County, Loan)
Southampton
Out: José Fonte (West Ham United, £8m)
Stoke City
In: Saido Berahino (West Bromwich Albion, £12m), Lee Grant (Derby County, £1.3m)
Out: Bojan (Mainz 05, Loan), Jakob Haugaard (Wigan Athletic, Loan), Sergio Molina (Albacete, Undisclosed), Moha El Ouriachi (Hearts, Loan) Ollie Shenton (Wrexham, Loan), Ryan Sweeney (Bristol Rovers, Loan), Joel Taylor (Rochdale, Loan), Dionatan Teixeira (Released)
Sunderland
In: Joleon Lescott (Unattached, Free), Bryan Oviedo and Darron Gibson (Everton, £7.5m combined)
Out: Patrick van Aanholt (Crystal Palace, £10m)
Swansea City
In: Tom Carroll (Tottenham Hotspur, £5m), Marvin Emnes (Blackburn, Loan Recall), Luciano Narsingh (PSV Eindhoven, £4m), Martin Olsson (Norwich City, £5m)
Out: Marvin Emnes (Blackburn Rovers, Loan)
Tottenham Hotspur
Out: Luke Amos (Southend United, Loan), Tom Carroll (Swansea City, £5m), Shayon Harrison (Yeovil Town, Loan), Ryan Loft (Stevenage, Loan), Connor Ogilvie (Stevenage, Loan), Anton Walkes (Atlanta United, Loan)
Watford
In: Tom Cleverley (Everton, Loan), M'Baye Niang (AC Milan, Loan), Mauro Zárate (Fiorentina, £2.3m)
Out: Alex Jakubiak (Wycombe Wanderers, Loan), Obbi Oulare (Willem II, Loan), Adalberto Peñaranda (Málaga, Loan)
West Bromwich Albion
In: Jake Livermore (Hull City, £10m)
Out: Saido Berahino (Stoke City, £12m), Craig Gardner (Birmingham City, Loan), Callum McManaman (Sheffield Wednesday, Loan), Tyler Roberts (Shrewsbury Town, Loan), Joe Ward (Released), Andre Wright (Yeovil Town, Loan)
West Ham United
In: José Fonte (Southampton, £8m), Robert Snodgrass (Hull City, £10.2m)
Out: Marcus Browne (Wigan Athletic, Loan), Sam Howes (Hampton and Richmond Borough, Loan), Toni Martínez (Oxford United, Loan), Lewis Page (Charlton Athletic, Undisclosed), Dimitri Payet (Olympique Marseille, £25m), Alex Pike (Cheltenham Town, Loan), Martin Samuelsen (Peterborough United, Loan), Simone Zaza (Juventus, Loan Recall)
Catch up with this week's episode of 888sport Football Friday Live
