Online pokies have a variable payout percentage, also called RTP, so it depends on the particular machine. The very best pokie machine to win in Australia can have a payout percentage as high as 99% – Mega Joker by NetEnt and Ugga Bugga by Playtech both boast 99%+ payout percentages.
Generally speaking, we would advise against playing any pokie machine with a payout percentage below 95%. There are literally thousands of pokies out there, so don’t set yourself up with a low paying pokie.