The Government's widely touted return to surplus is likely to take a further 12 months and is largely reliant on cuts to spending.
In spite of that, Finance Minister Bill English says tax cuts remain on the cards for election year 2017.
Yesterday's Half Year Economic and Fiscal Update saw the Treasury change its forecast of an operating balance before gains and losses (Obegal) surplus of $297 million for the 2014-15 year to a deficit of $572 million.
Acting Treasury Secretary Vicky Robertson said that despite solid growth in the economy, the Crown's finances would take a hit from a lower than previously forecast tax take due to low dairy prices and interest rates.