Expert scientific advice on the vaccination rate that will determine when the nation can begin living with COVID-19 cases in the community will be tempered by Treasury advice about the economic cost of maintaining restrictions, Prime Minister Scott Morrison says.

With the national cabinet to examine on Friday the advice from the Doherty Institute about the vaccination rates that will enable society to reopen, Mr Morrison indicated that if those rates were deemed too high or unachievable, economic factors would have to be taken into account.