Clive Palmer is promising an announcement on Wednesday that will offer "hope to mankind" after a crucial policy discussion with his senators-elect.

The three successful Palmer United Party (PUP) candidates and PUP leader Mr Palmer are due to meet on Wednesday to finalise the party's position on key legislation, including the repeal of the carbon tax.

As the largest voting bloc on the new micro-party cross bench, the PUP will hold the balance of power when the Senate changes over next Tuesday.

Its power has been boosted by an agreement with Victoria's Motoring Enthusiast Party senator-elect Ricky Muir.

The Fairfax MP says he will reveal the outcome of the party room meeting on Wednesday evening, along with an announcement he says will be of international significance.

"Wednesday night we'll have an announcement to make on what we think is a solution for Australia and the world," Mr Palmer told the ABC.

"It's going to be a very exciting time I think."

He says it will be a "big day - massive day".

"We'll be very clear about a number of things and offering hope for mankind," he said.

The soon-to-be Senate kingpin is also due to hold his first face-to-face meeting with Prime Minister Tony Abbott over breakfast on Thursday morning.

It will be the first time the two have met since they fell out at a Liberal Party national conference in 2012.

"Tony Abbott's not the sort of guy to hold a grudge, is he? I'll certainly smile at him, I'm sure he'll smile back at me," Mr Palmer said.

He denied his political positions were motivated by revenge on the Prime Minister.

"I'm certainly not very happy with [Queensland Premier] Campbell Newman but I wouldn't put Tony Abbott in his category," he said.

If Labor and the Greens oppose Government legislation, Mr Abbott will have to negotiate with a micro-party cross bench of eight senators - six of whose votes will be needed to pass any bills.

Mr Palmer has already declared the PUP will not support billions of dollars in budget measures - including the $7 GP fee, the increase to the fuel excise, the new paid parental leave scheme and changes to pensions.

He is yet to show his hand on the $7.5 billion worth of cuts to Family Tax Benefits, though his first response in the ABC interview on Tuesday was not positive.

"We're looking at that and the thought at the moment is that's not something we should support," he said.

"Our members are writing back to us on that, and there's been a lot of interaction on that. I think we've got to keep an open mind on that.

"We don't want to make it harder for families."

When pressed to name a budget measure he did support, Mr Palmer pointed to the cuts and changes to foreign aid but left the door open to backing others.

"I think there's more things than that but I can't give you all the news at once," he said.