Labor has delivered three new taxes in three weeks and can't control its spending, Opposition Leader Tony Abbott says.
Treasurer Chris Bowen will release a mini-budget in Canberra on Friday, ahead of a possible September 7 election date announcement this weekend.
"What you get from Labor is more spending, more deficits and more boats," Mr Abbott told reporters in Melbourne.
"Kevin Rudd has now been the prime minister for just over a month.
"What we've got in a month, three new taxes and more than 4000 illegal arrivals by boat."
He said the coalition would ensure Australia was "safe, secure and solvent".
Mr Abbott said he disagreed with a proposed 0.05 per cent insurance levy on bank deposits up to $250,000.
"It's just another smash-and-grab raid," he said.
Mr Abbott said the coalition was "more than ready" for the election whenever it was called.
"I'm very happy to see Mr Rudd's popularity, my own popularity, the standing of our respective parties, tested in the only way that matters - at an election," he said.