The Turnbull government's 10-year plan to slash business taxes will brought to a Senate vote within this parliamentary sitting fortnight, 10 months after it was first announced.
The $50 billion worth of cuts will be introduced incrementally over the next decade to a standard rate of 25 per cent.
The first leg would lower the rate to 27.5 per cent for companies with a turnover of less than $10 million.
"We're saying they should be paying less tax this year," Treasurer Scott Morrison told reporters in Canberra on Monday.
Companies with a turnover less $2 million now pay 28.5 per cent, while all other businesses pay 30 per cent.
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Lower house debate on the package is scheduled to resume on Tuesday.
Labor remains vehemently opposed to the tax cuts, other than for those with a turnover less than $2 million.
In a new line of attack, the opposition claims Australians will be forced to fork out $4 billion in extra interest charges if company tax cuts go ahead.
Opposition finance spokesman Jim Chalmers said taxpayers would be disgusted by the new figures reflecting the "messed up" priorities of the prime minister and his treasurer.
"Malcolm Turnbull is so out of touch that he thinks it's ok to borrow $50 billion to give to big multinationals and the big banks at the expense of ordinary Australians who will be sent the interest bill," he told reporters in Canberra.
Labor's calculations are a 10-year estimate based on a 2.7 per cent interest rate that relies on the government either raising debt or not paying it down to pay for the tax cuts.
