NSW Treasurer Dominic Perrottet is expected to reveal a state budget surplus of $802 million, smaller than last year's figure and below forecast.
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Mr Perrottet is tipped to reveal future surpluses averaging $1.7 billion over the next four years, The Australian reports.
In his budget speech to be delivered on Tuesday, the treasurer is expected to announce funding for the government's election commitments and record investments.
"Our bold decisions have unleashed a mega-building program on a scale never before seen in the history of our nation," he will say, according to The Australian.
"Our infrastructure investment is approaching $100 billion -- a new golden century for NSW.
"Despite the largest revenue writedowns in our history, Fortress NSW is standing strong.
"We are strongly positioned to face the future with confidence."
Last year's budget surplus was $3.9 billion.
Mr Perrottet said Tuesday's budget will also have the state's farmers at its heart.
It will include an additional $355 million for drought support and $400 million to improve regional data and mobile connectivity.
"In many ways, it is a budget for the bush, and our farmers are at the heart of the budget," Mr Perrottet told AAP on Monday.
The treasurer said the budget would lock in commitments made in the lead-up to the election including 4600 extra teachers, 5000 new nurses and midwives and 1500 extra police officers.
Education will receive an extra $1.2 billion in the upcoming NSW budget, with the state government boasting of a record investment.
Premier Gladys Berejiklian, Treasurer Dominic Perrottet and Education Minister Sarah Mitchell on Monday said education spending would reach $18.5 billion in 2019/20.
Budget savings will include cutting the "back office" of the NSW government and changes to long service leave for public servants.
He expected job losses - in the range of 1000 to 2500 positions - would occur through voluntary redundancies and natural attrition.
He acknowledged NSW faced several challenges including a correction in the property market and a drop in stamp duty and GST revenue.
But Mr Perrottet said building infrastructure would drive economic growth and while he didn't want to pre-empt the numbers, the budget would be in surplus.
Australian Associated Press