Leading betting agency Sportsbet gives Labor no chance of winning the State election.
Describing Colin Barnett as the Black Caviar in the political race, Sportsbet is offering $1.02 on the Premier compared with $10 for a wager on Labor.
Labor's odds have ballooned from $3 when the election campaign started. The Liberals opened at $1.10 and their odds have shortened as the campaign has gone on.
"In a two-horse race the Liberals are set to win by 15 lengths," Sportsbet's Ben Hawes said yesterday.
"The support for the Liberals has been pretty steady."
For every $1 bet on Labor, $19 is being punted on the Liberals.
One of the biggest bets laid on the Liberals was $10,250 at $1.05 for the win.