Federal Treasury Secretary Ken Henry told media on Monday it is too early to write off all prospects of the resource super profits tax after it was introduced to the mining sector.

In a speech on Australia's future tax system in Sydney, Dr. Henry said the policy reforms will take a while to become a legislation in the country, and admits that the prospect and the outcome of the tax is still premature to speculate for now.

"I haven't myself come to the view that you seem to have that this particular reform proposal has dim prospects," he said.

“I don't see it that way yet at all. And bear in mind this particular tax policy proposal is still two years away from commencement. There's still quite a journey ahead of us."

Dr. Henry said he already anticipated the heated debate surrounding the proposed 40 per cent tax on mining profits from the concerned companies, particularly from the mining sector.

"The experience of Australia over many years has been that policy ideas do tend to be quite controversial and excite a lot of interest and don't always get implemented as quickly as they should, and this particular tax policy proposal is still two years away from commencement."

He added that a lower rate of company tax can boost investments and reduce the cost of capital