Hypobapta percomptaria, the southern grey, is a moth of the family Geometridae. It was first described by Achille Guenée in 1857. It is known from Australia. The study by Hausmann and colleagues (2009) restrict it to Tasmania; earlier records from the Australian mainland represent Hypobapta tachyhalotaria (sensu lato).
The wingspan for males is and for females . The larvae feed on Eucalyptus.