Treasurer Scott Morrison will this week reveal new budget cuts worth $5 billion over four years.

Every dollar in new spending announced since the May budget - which includes Prime Minister Malcolm Turnbull's $1.1 billion innovation strategy and the $700 million cost of resettling 12,000 Syrian refugees - will be offset through savings, Mr Morrison insisted on Sunday.

"The budget rules state that any new spending must be fully offset," he said.

"There have been a series of measures since the budget that require the offset rule to be applied such as the commitment to accept 12,000 refugee and humanitarian entrants, the reversal of the bank deposits tax as well as additional funding for Roads to Recovery".