In the 2007 season, Østberg continued with an Impreza WRC 2005 and competed in six world rallies for the Prodrive-supported Adapta team.

He gained another second-place finish at 2011 Rally GB, the final round, and ended sixth in the drivers championship.

In December of that year, it was announced that Østberg will move to Citroën's works team for 2014 with Kris Meeke as his team-mate.

He finally ended the season as the "best of the rest", ranked fourth in the championship behind the trio of VW drivers.

At the end of the 2015 season, it was announced that Østberg would return to M-Sport for 2016, this time driving the Evolution version of the Fiesta RS WRC.

Østberg announced he would take on a limited schedule in a private entry for 2017 (shared with Martin Prokop) as he and wife Beate welcomed his first child in late February.