Labor and the coalition see each other as the devil, Clive Palmer says, so he wouldn't be surprised if both preferenced his party.

The Palmer United Party (PUP) has had inquiries about preferences from "everybody who's standing", but Mr Palmer is tight-lipped on he'll choose.

"When the nominations close, and we know who the candidates are well then we can make a public announcement about preferences, but until that happens we really can't," he said.

However, Mr Palmer wouldn't be surprised if the coalition and Labor both preferenced his party.

"Why not? Why wouldn't they if they're supposed to hate each other, and one's supposed to be the devil and supposed to be the good guy," he said.

"I don't know who's the good guys and the devils, to me they're all just the same."