2008–09 West Ham United F.C. season In In

| Name_ | Country | Type_ | Moving_from | Transfer_fee |
|---|---|---|---|---|
| Eyjólfsson | ISL | Transferred | HK | Undisclosed |
| Bajner | HUN | Transferred | Liberty Oradea | Undisclosed |
| Behrami | SUI | Transferred | Lazio | £ 5m |
| Laštůvka | CZE | Loaned | ShakhtarDonetsk | N/A |
| Grasser | AUT | Transferred | Grazer AK | Undisclosed |
| Ilunga | COD | Loaned | Toulouse | N/A |
| Di Michele | ITA | Loaned | Torino | N/A |
| López | URU | Transferred | River Plate | Free agent |
| Tristán | ESP | Transferred | Livorno | Free agent |