The 2005 Holden Performance Driving Centre V8 Supercar Series was an Australian touring car series held for V8 Supercars. It was the sixth series held for second tier V8 Supercar teams. The season began on 18 March 2005 at Wakefield Park and finished on 27 November at Phillip Island Grand Prix Circuit. The season consisted of seven rounds held across four different states. The series was expanded for 2005, incorporating the previously stand-alone support race at Bathurst 1000 into a series round and adding a finale on the support program of the Bigpond Grand Finale.