Finance Minister Bill English has warned that returning to surplus this year will be a challenge due to falling dairy prices and low inflation.
However, the New Zealand economy remained on track, with incomes and the number of jobs set to rise over the next few years, he said.
Mr English said next month's half yearly fiscal and economic update from the Treasury may not forecast a budget surplus.
The Treasury projected a surplus of $297 million in the year ending June 30, 2015, on an operating balance before gains and losses basis in the pre-election economic and fiscal update released in August. That was reduced from a projected surplus of $372 million in the May budget.
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