Mining magnate Clive Palmer says police are investigating a burglary at his company's Brisbane headquarters overnight.

He says a computer was stolen, along with corporate and financial records.

Mr Palmer says he believes the incident is linked to his recent decision to contest the September federal election with the United Australia Party.

"I had a telephone call from our financial adviser Michael Dahl who said there'd been a break-in to our financial section, that his computer had been stolen and other items had been stolen and been gone through, which I can't go through," he said.

"Of course this could have been a coincidence.

"This could have just happened after the polls were published showing we had 30 to 40 per cent of the people, so we can't be too upset about it, you know.

"It's interesting that there are eight floors in that building, it's interesting that they should target the financial section of our building and they should take, not take a file, but take the whole computer.

"I fully should say when I was director of the National Party, if you can't win on the policies you always attack the man.

"But what we want for an election is absolute transparency."

Meanwhile, Mr Palmer says an announcement will be made tomorrow on which sitting Queensland MPs have decided to join his United Australia Party.

Gold Coast Independent Alex Douglas is tipped as a possibility.

Mr Palmer says he can't say too much just yet.

"We've had MPs coming forward but I think you'll find some things happening tomorrow," he said.

"We don't want to give all you people, the news in one go - we won't have anything to say tomorrow."