Malcolm Turnbull says his government is looking at the "entire superannuation system" as it reviews its tax policies.
The prime minister was asked by Labor in parliament on Tuesday whether he could rule out cutting the capital gains tax discount for superannuation accounts.
"What we are looking at is the entire superannuation system, as you would expect, in any responsible review of taxation," Mr Turnbull said.
Mr Turnbull said the tax on superannuation earnings, as they are accumulated, is "remarkably low".
The government would not be rushing into any "snap decisions".
The prime minister said the savings of most Australians were tied up in their homes, the value of which Labor's policy on capital gains and negative gearing would force down.
