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Estimates of revenue lost to the Commonwealth budget through tax concessions are referred to in budget documents as 'taxation expenditure' or 'foregone revenue'.
Each January the Australian Taxation Office publishes a Taxation Expenditure Statement which itemises each tax concession and provides an estimate for the cost of each item to the budget.
Foregone revenue data is also provided in the budget documents each May (April next year due to the election).
The ATO used to total up the aggregated (estimated) cost to the budget but no longer provides this in the report. Ausgov.info provides an aggregate of forgegone revenue for each year that machine-readable data is available.
Click on a point in the chart (above) to drill down into the tax concession data or enter a search term in the box (below) to chart the yearly total for all matching items.
You can also chart the cost of the items in each Category (below) or chart all items by year.