There is no single collection of school income data, and because of differences between the various collections, not all data reported on these pages is directly comparable. There are four key sources of information about school funding:
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Government expenditure on government schools (from the National Schools Statistics Collection (Finance))
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Non-government schools’ income and expenditure (from the Australian Government Department of Education (AGDE) financial questionnaire)
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School income and capital expenditure for government and non-government schools (based on MySchool Data collected by ACARA from state and territory governments and AGDE)
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Government recurrent expenditure on government and non-government schools, (based on the NSSC Finance Collection, federal budget papers and data provided to the Productivity Commission)
For time series data, values can be viewed as nominal (actual) values, or values adjusted for inflation based on either the Consumer Price Index (CPI), the General Government Final Consumption Expenditure (GGFCE) chain price deflator or the ABS Wage Price Index (WPI).
These price deflators are explained in more detail here.