The small business package central to Tony Abbott's final budget does not seem to have delivered the promised turbocharge to Australia's economy.

The so-called "Tony's Tradies'' package, which is set to cost the budget $5.5 billion over four years, was designed to provide a platform for the Abbott government's re-election plans.

It included a cut in the small business tax rate of 1.5 per cent, and the ability for companies with revenue under $2 million to claim an unlimited number of tax deductions for items that cost less than $20,000 each.

Former Treasurer Joe Hockey said on budget night last year that the policy would boost the economy and create jobs.