Treasurer Dominic Perrottet says the NSW government will continue to hand out transfer duty subsidies to first-home buyers for “as long as it’s making a difference,” despite the substantial hit to the state budget.

The state government has forgone more than $2 billion in revenue from its swath of cost of living initiatives, including the first-home buyers grant and transfer duty discounts.

NSW taxpayers have held onto more than $1 billion in CTP green slip savings between December 2017 and June this year.

NSW Premier Gladys Berejiklian and Treasurer Dominic Perrottet announce the roll-out of cost of living savings measures. Credit: Steven Siewert

Mr Perrottet, who this month announced an $810 million budget surplus for 2019-20, said he wasn’t concerned the government was giving up so much revenue.