Prime Minister Matteo Renzi has pledged €50m (£42m) in funds for rebuilding, BBC reports.
At least 268 people are now known to have died and 400 were injured. Teams have continued to search the rubble of toppled buildings for a second night.
However, hundreds of aftershocks have hampered the efforts of the 5,000 rescuers.
Another magnitude-4.7 tremor struck early on Friday.
In addition to the funds, Mr Renzi cancelled taxes for residents and announced a new initiative, “Italian Homes”, to tackle criticism over shoddy construction.
But he also said that it was “absurd” to think that Italy could build completely quake-proof buildings.
It follows criticism in the Italian press over building standards in high-risk areas. Some of the buildings that collapsed had recently been renovated.
Historic towns do not have to conform to anti-quake building regulations, which are also often not applied when new buildings are put up.
The 6.2-magnitude quake hit in the early hours of Wednesday, 100km (65 miles) north-east of Rome in mountainous central Italy.
The worst affected towns – Amatrice, Arquata, Accumoli and Pescara del Tronto – are usually sparsely populated but have been swelled by tourists visiting for summer, making estimates for the precise number missing difficult.
More than 200 people died in Amatrice alone.
At least three Britons died in the quake, a local official in Amatrice told the BBC. The Romanian government said 11 of its citizens were missing.
Bodies are still being found in the town, including one discovered in the rubble of the Hotel Roma in the city late on Thursday.
An official with the fire department, Lorenzo Botti, admitted they were facing a race against time.
“The chances of finding people alive in these conditions, in this type of setting, well, it’s challenging,” he said.
But other rescuers said there was still hope, noting that one survivor was pulled from ruins in L’Aquila in 2009 three days after an earthquake that killed more than 300 people.
Search teams have asked locals to disable their wi-fi passwords to help rescue workers communicate more effectively.
Police have also arrested a man for attempting to break into and loot an empty home in the town, Ansa reported.