Since then, prices of dairy products have extended their decline, prompting analysts to trim their forecasts for Fonterra Cooperative Group's 2016 payout after the dairy company slashed its payout for the current season to $4.50 per kilogram of milk solids, from a previous forecast of $4.70/kgMS.
The continued decline has also stoked speculation the Treasury will pull back its forecasts for economic growth.
"We're getting on top of spending, but lower inflation, while good for households and businesses, means Treasury's budget forecasts will show a small deficit for 2014/15," English said.
The nine-month statements today show gross debt was $88.2 billion, or 37.1 per cent of gross domestic product, which is bigger than the $83.7 billion, or 35.2 per cent of GDP projected in the HYEFU. Net debt was $63 billion, or 26.5 percent of GDP, under-shooting the projection of $64.8 billion, or 27.2 per cent.
Much of the higher tax take was driven by corporate tax being $545 million, or 9 per cent, above forecast.
Of that some $300 million was likely related to timing of payments and would reverse out through the June quarter, the Treasury said.
Other individuals' tax was $357 million, or 10.4 per cent above forecast, while the excise paid on tobacco resulted in Customs and excise duties being $129 million, or 4 per cent above expectations.
Against that, goods and services tax was $201 million, or 1.6 per cent below forecast, mainly due to weaker than expected growth in consumption and earthquake-related refunds that were about $60 million larger than forecast.
Net losses on non-financial instruments were $4.6 billion higher than forecast, mainly reflecting actuarial losses on liabilities of Accident Compensation Corp and the Government Superannuation Fund.
This was partly offset by net gains on financial instruments that were $1.5 billion better than projected.
Total Crown assets were valued at $264.4 billion as at March 31, while liabilities were $184.9 billion.