Earlier this month, the Herald revealed that the total cost of the disaster could reach up to $3 billion.
Treasury secretary Gabriel Makhlouf said some of the $2b-$3b cost of the devastating quake would be covered by insurance or existing resources.
He said the event "definitely had an effect on the economy and the Government's fiscal position" - but it was unlikely to damage the national tourism industry.
A month after the deadly quake shattered Kaikoura shortly after midnight, the tourist destination is still struggling.
The violent shaking caused massive fault line ruptures and slips, damaging buildings and closing all access roads to the seaside town.
While the Inland Rd has been opened up to residents and services on a controlled convoy basis, State Highway 1 north and south of the town remains closed.
The SH1 route linking Christchurch and Kaikoura should reopen next week, the New Zealand Transport Authority says.
Transport Minister Simon Bridges today said SH1 and the rail corridor along the coastal route to the north and south of Kaikoura would be rebuilt in about 12 months.