The committee's report showed that of 3809 submissions on extending paid parental leave from 14 to 26 weeks, 99.6 per cent were in favour.
The report also gave detailed costings for extending paid parental leave.
Treasury estimated the additional cost would be $276 million over three years, with savings of at least $28.4 million once the scheme was fully implemented.
The bill proposed a staged increase, adding four weeks of leave each year over three years.
Ms Moroney said: "The report ... shows Bill English's assertion that the bill would cost $500m in three years was over-egged with official advice to the committee costing the net amount at $220m over the next three years."
Prime Minister John Key said yesterday that the Government was yet to decide on its final position on paid parental leave.
He indicated there would be an increase in the May Budget, but it would not go as far as the 26 weeks proposed by Ms Moroney's bill.
"We are working our way through it, in terms of Budget bids. Twenty-six weeks is not affordable, but we do think some extension might be."