How loyalty is measured — the CIES tenure metric
Average months in first-team squad as the standard measure
The CIES Football Observatory's annual player-stability report measures loyalty as the average number of months that the players currently in a club's first-team squad have spent at the club since their most recent arrival. The metric captures a snapshot of the squad's tenure at the report date (typically October each year) and is strongly correlated with — but not identical to — the average length of contracts being signed by the club, the inverse of the club's transfer-window activity intensity, and the extent to which the club promotes academy graduates into the first-team squad. The metric is published in months for ease of comparison and is broken down by individual club, by league and by national association. The latest CIES reports show the Premier League's average squad tenure consistently in the 30 to 38 months range across the 20 top-flight clubs, with substantial individual-club variation from the high-tenure top of the table (Tottenham, Manchester City, Liverpool, Arsenal in the post-2019 era) to the low-tenure bottom of the table (newly promoted clubs and post-takeover squads).
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Why the Premier League scores so high — structural drivers
Pay scale, contract length, work-permit constraints, brand value
Four structural drivers explain the Premier League's persistent positioning at or near the top of the European loyalty rankings. First, the pay scale at the top six — basic weekly wages routinely above £200,000 for first-team regulars, image-rights and bonus structures pushing total annual remuneration into the £15 million-plus range for marquee players — leaves the player with limited financial incentive to move within Europe (the equivalent earning ceiling at the top La Liga, Bundesliga or Ligue 1 clubs is materially lower outside of Real Madrid, Barcelona and Paris Saint-Germain). Second, the typical Premier League contract length on signing or extension is now five years, occasionally extending to six, against the four-year norm in much of continental Europe; the longer baseline contract length compounds into longer average tenure. Third, the post-Brexit work-permit and Governing Body Endorsement system has constrained the ease with which Premier League clubs can sign young European players, pushing recruitment toward established senior international players who command higher fees and longer commitments. Fourth, the global brand value of the Premier League and its top-six clubs gives sponsors, agents and players a non-financial reason to commit to longer contracts at named clubs.
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Tottenham Hotspur — the long-tenure outlier
Harry Kane's 19-year academy-to-Bayern arc and the Levy retention model
Tottenham Hotspur has been one of the consistently highest-tenure Premier League squads in CIES rankings through the post-2015 period, driven by a combination of deliberate Daniel Levy-led contract management (long initial deals, frequent early-extension renewals at incremental wage increases), a high-functioning academy that has produced a string of one-club men or near-one-club men into the first team, and a transfer-window posture that historically prioritised retention over high-volume turnover. Harry Kane's 19-year arc at the club from 2004 academy intake to the £100 million-bonuses sale to Bayern Munich in summer 2023 was the defining single example, but the broader pattern includes Hugo Lloris (2012 to 2023), Jan Vertonghen (2012 to 2020), Eric Dier (2014 to 2024), Ben Davies (2014 to date), Son Heung-min (2015 to date) and the academy graduates Harry Winks and Oliver Skipp. The Pochettino-era squad of 2018-19 that reached the Champions League final included nine players with five-plus years at the club. The 2024-onwards Ange Postecoglou rebuild has somewhat reset the average tenure, but the Levy retention model remains the league's most distinctive long-tenure approach.
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Manchester United — Sir Alex's legacy and the post-2013 reset
Ryan Giggs' 24-year career and the more turbulent post-Ferguson period
Manchester United was, for the duration of Sir Alex Ferguson's 1986 to 2013 tenure, the highest-tenure squad in English football by a substantial margin — Ryan Giggs' 24-year first-team career (1991 to 2014) was the apex example, with Paul Scholes (1994 to 2011 and 2012 to 2013), Gary Neville (1992 to 2011) and Nicky Butt (1993 to 2004) all serving over a decade at Old Trafford. The Class of '92 academy intake produced the most prolific one-club-or-near-one-club generation in modern Premier League history. The post-Ferguson period (David Moyes through to Erik ten Hag and into the Ratcliffe-era Ruben Amorim regime) has been substantially more turbulent in transfer-window activity and average tenure has fallen — the post-2014 squads have averaged in the high 20s to mid-30s of months in CIES rankings, against the 40-plus that the late-Ferguson teams routinely produced. The 2024-onwards INEOS-led football operations have publicly committed to a longer-term squad-building approach with extended contract lengths.
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Liverpool and the Klopp-era retention discipline
Virgil van Dijk, Mohamed Salah and the contract-extension culture
Liverpool under Jurgen Klopp from October 2015 through to summer 2024 deployed a deliberate retention-and-extension model that produced one of the highest-tenure top-six squads in the late Klopp years. The 2019-20 title-winning squad included nine starters with three-plus years at the club, with Jordan Henderson (2011 to 2023), James Milner (2015 to 2023), Adam Lallana (2014 to 2020), Roberto Firmino (2015 to 2023), Mohamed Salah (2017 to date), Sadio Mane (2016 to 2022) and Virgil van Dijk (2018 to date) all serving five-plus-year stints. The contract-extension policy under Klopp and Michael Edwards (sporting director through 2022) was unusually disciplined for a top-six Premier League club — early-extension renewals on incremental wage increases rather than late-cycle distress negotiations on top-of-market deals. The 2024-onwards Arne Slot succession has continued the same approach, with Salah's 2025 contract extension the most consequential single example.
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Manchester City — squad-stability behind the Pep dynasty
The longest-serving City spine and the contract-management approach
Manchester City's 2017-onwards dynasty under Pep Guardiola has been built on an unusually stable squad spine for a state-funded club. Bernardo Silva (2017 to date), Kevin De Bruyne (2015 to 2025), Ederson (2017 to date), Ruben Dias (2020 to date), Rodri (2019 to date), Phil Foden (2017 academy promotion to date) and Kyle Walker (2017 to 2024) collectively delivered the spine of five Premier League titles in six seasons through 2025. The contract-management approach, led by Khaldoon Al Mubarak as chairman and the various football directors through Txiki Begiristain to Hugo Viana, has been characterised by long contracts on signing (frequently five years), early extensions for performing players, and a willingness to refuse exit transfers from clubs the player wanted to leave for. The CIES tenure rankings consistently place City in the top three or four of the Premier League. The 2025-onwards rebuild around Erling Haaland, Phil Foden and the new generation of academy graduates is on track to extend the pattern.
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The shrinking pool of one-club men in modern football
Why long-tenure single-club careers are getting rarer
The era of the genuine one-club career — a player joining an academy as a teenager, debuting for the first team at 17 or 18, and retiring at 35 having played for no other professional club — has been compressed substantially over the past two decades by the combination of Bosman-era player mobility, the post-2010 explosion in agent-driven transfer activity, the financial pressure on top-six clubs to monetise senior assets in their late 20s, and the work-permit-and-tax-status complications of moving between top European leagues. The modern equivalent of the one-club man is more typically the eight-to-twelve-year servant who joins in his early 20s, plays the bulk of his peak years at one club, and either retires there or moves out for one final lower-pressure contract. Examples in the post-2015 Premier League era include Harry Kane (Tottenham 2004 to 2023, then Bayern), Sergio Aguero (Manchester City 2011 to 2021), Vincent Kompany (Manchester City 2008 to 2019), Steven Gerrard (Liverpool 1998 to 2015) and Frank Lampard (Chelsea 2001 to 2014). The genuine pure one-club career is now confined to a small handful of players — Francesco Totti at Roma until 2017 and Paolo Maldini at AC Milan until 2009 are the canonical recent European examples.
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Aston Villa, Newcastle and the post-takeover loyalty reset
How a major ownership change shifts the squad-tenure profile
A major change of club ownership — particularly a state-fund or sovereign-wealth acquisition — typically resets the squad-tenure profile of the buying club within 24 to 36 months. The Newcastle United takeover by the Saudi Public Investment Fund in October 2021 produced the predictable wave of incoming signings (Bruno Guimaraes from Lyon for £40 million, Alexander Isak from Real Sociedad for £63 million, Sven Botman from Lille for £35 million, Anthony Gordon from Everton for £40 million) that displaced the surviving pre-takeover squad and dropped the CIES tenure metric significantly through the 2022 to 2024 period. The Aston Villa rebuild under V Sports (Wes Edens, Nassef Sawiris) and the Unai Emery managerial appointment from October 2022 produced a similar pattern — the substantial squad turnover through the summer 2023 and summer 2024 windows, including the £52 million signing of Moussa Diaby from Bayer Leverkusen and the £55 million signing of Amadou Onana from Everton, dropped Villa's CIES tenure ranking. The general pattern across post-takeover Premier League clubs is consistent: a 12 to 36 month dip in average tenure as incoming signings displace the inherited squad, followed by a stabilisation phase as the new squad accumulates years of service.
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