The cabal of Australia's most powerful women has a new member, with a reclusive internet entrepreneur joining the likes of Julia Gillard and Gina Rinehart in the top echelon.

Vicky Teoh, a part owner of broadband service TPG with her husband, David, was today named by BRW as Australia's richest self-made woman with an estimated fortune of $390 million.

It's the first time BRW has compiled a "rich women" list and the self-made caveat excludes the likes of Rinehart, who founded her mining empire - valued by Forbes magazine at $16.75 billion - on an inheritance from her father.

Teoh topped Perth businesswoman Rhonda Wyllie, Melbourne's Patricia Ilhan and Hollywood actor Nicole Kidman to take the top spot in the BRW poll.