Finance Minister Bill English says it will be a challenge to maintain and grow surpluses.
He told a select committee yesterday that the last two cycles of economic upturn, in the mid-90s and mid-2000s, had the tail wind of 4 or 5 per cent inflation, which increased revenue and which is not present now. "The scenario is not going to be repeated, that is Government bouncing off a balanced budget into rapidly escalating surpluses.
"It will have to be fairly careful management to ensure that there are surpluses when the tax take is growing at a much lower rate than used to be the case."
Labour finance spokesman Grant Robertson said Mr English was softening up the public for a deficit for the current year, 2015-2016, when half-yearly Treasury forecasts are released next Tuesday.
The May Budget forecast a minuscule surplus for the current year of $176 million but then rapidly expanding surpluses climbing to $3.2 billion in the 2019 year.