| From | Team | Fee | Apps | Goals | To | |
|---|---|---|---|---|---|---|
| 1994 | Valur | - | 17 | 7 | 1995 | (Player) |
| 1995 | PSV Eindhoven | - | 13 | 3 | 1997 | (Player) |
| 1997 | KR | - | 6 | 0 | 1998 | (Player) |
| 1998 | Bolton Wanderers | Free | 55 | 18 | 2000 | (Player) |
| 2000 | Chelsea | £5,000,000 | 186 | 54 | 2006 | (Player) |
| 2006 | Barcelona | £8,000,000 | 72 | 13 | 2009 | (Player) |
| 2009 | AS Monaco | Free | 0 | 2010 | (Player) | |
| 2010 | Stoke City | Free | 4 | 0 | 2011 | (Player) |
| 2010 | Tottenham Hotspur | Loan | 11 | 1 | 2010 | (On loan) |
| 2011 | Fulham | Loan | 10 | 0 | 2011 | (On loan) |
| 2011 | AEK Athens | Free | 10 | 1 | 2012 | (Player) |
| 2012 | Cercle Brugge | - | 13 | 6 | 2013 | (Player) |
| 2013 | Club Brugge KV | - | 46 | 7 | 2014 | (Player) |
| 2014 | Bolton Wanderers | Free | 21 | 5 | 2015 | (Player) |