At the end of the 2005–06 Championship season Watford were promoted to the Premier League and Bangura was rewarded with a contract extension taking him through to the end of the 2008–09 season. The 2006–07 season saw Bangura make his Premier League debut as a 75th-minute substitute in a 1–2 home defeat to Manchester United. He made a total of 20 appearances, 16 of which were in the Premier League as Watford finished bottom of the table in 20th place and were relegated back to the Championship.