Green slip refunds worth up to $120 can be claimed via Service NSW either online, over the phone or in store.
To be eligible for a refund, you must have purchased or renewed your green slip before 1 December 2017.
Minister for Finance, Services and Property Victor Dominello said 2.2 million vehicle owners had already claimed $128 million worth of refunds, yet there was still $58 million still to be claimed by 1.35 million vehicle owners.
“There are so many families and households who could benefit from these refunds, which is why we are extending the deadline,” Mr Dominello said.
“The new CTP scheme is a triple win for motorists who receive a cheaper green slip, a partial refund on what they paid last year and faster benefits should they be injured on the road.”