No dollar figure on tax cuts: Turnbull

Prime Minister Malcolm Turnbull has declined to put a figure on his 10-year company tax cut plan.

Tuesday's budget included a plan to reduce company tax to 25 per cent within a decade, but the budget papers do not put a dollar figure on the cost to taxpayers.

"The Treasury has not identified the dollar cost of that particular item - what it has done is set out a medium term outlook which takes account of the company tax cut and all the other tax arrangements," Mr Turnbull told Sky News on Thursday.