Revenue is plummeting and the deficits are swelling but the Australian Government remains adamant it'll have the Budget back in surplus within the decade.
The deficit is expected to balloon to A$35.1 billion ($37.89 billion) in 2015/16 - A$4 billion worse than Treasury's December forecast but better than the A$41 billion economists expected.
Deficits for 2016/17 and 2017/18 have also deteriorated since the Government's mid-year update but Treasury still expects a return to surplus in 2019/20 after more than a decade in the red.
Budget documents show government revenue has taken a massive hit in the past year, mostly because of plummeting iron ore prices but also sluggish wage growth, with expected tax receipts downgraded by A$52 billion over the four years to 2017/18.
Economic growth forecasts have also been downgraded amid a slower-than-expected rebound in non-mining business investment, while unemployment is expected to hit 6.5 per cent over the next year -- a level not seen since June 2002.