Joe Hockey will declare today the coalition can improve the Federal Budget by $6 billion and reduce debt by $16 billion over the next four years.
In releasing the coalition's election costings just two days before Australians vote, the shadow treasurer will claim he can deliver a "material improvement" to the nation's finances.
But in finding $6 billion in extra savings - just 0.4 per cent of Federal outlays over four years - Mr Hockey cannot commit an Abbott government to an earlier return to surplus than Labor.
Three-quarters of the coalition's proposed savings were released last week, when $31.6 billion in cuts were announced.
A panel of three eminent economists and public servants Geoff Carmody, Len Scanlan and Peter Shergold was last night deliberating over the coalition's costings ahead of their release today.
Mr Hockey's savings are believed to emphasise productivity and removing waste and duplication.
As reported in _The West Australian _this week, the coalition is expected to trim rural roads funding and axe the regional infrastructure fund set up with $3.6 billion from the mining tax.
Labor released about half of its election commitments for the Departments of Treasury and Finance to cost. Treasurer Chris Bowen said the impact on the Budget so far was a small $12 million improvement.
The other policies were sent to the departments under the Charter of Budget Honesty for examination.
Mr Bowen said the Government had honoured the charter, unlike the Opposition which had failed to have its policies costed by Treasury.
But the Opposition claims there are holes in Labor's figures, including a commitment to bring forward navy supply ships, which will be financed out of the existing defence budget.
However, there are also question marks over one of the coalition's major savings.
It pledged to axe the Clean Energy Finance Corporation as part of $1.5 billion in carbon tax measures it wants to end.
But Senate Clerk Rosemary Laing argued legislation would be needed to wind up a statutory authority.
Directing it to stop its work could be illegal.She said a minister "who declined to carry out a statutory function" would risk serious legal issues and action if a lack of funding meant contracts were defaulted.