How Australian Income Tax Works
Australia uses a progressive tax system, meaning you pay higher rates of tax
only on the portion of your income that falls into higher brackets. The first $18,200 of income
for residents is currently tax-free (the tax-free threshold).
Most residents also pay a Medicare Levy, which is typically 2% of taxable
income, to help fund the public health system. This is calculated separately from income tax.
Tax Rates by Year (1983–2026)
This calculator allows you to go back in time and see how tax rates have changed over the last
40 years. For example, in the mid-1980s, the top marginal tax rate was 60%, significantly higher
than the current top rate of 45%.
Current 2024-25 Residents Structure (Stage 3):
$0 – $18,200: 0%
$18,201 – $45,000: 16%
$45,001 – $135,000: 30%
$135,001 – $190,000: 37%
Over $190,000: 45%
How This Calculator Works
Our tool uses a precise dataset of historical ATO tax brackets. When you select a year and
residency status:
- It identifies the correct tax brackets for that specific financial year.
- It splits your income into the applicable chunks (brackets).
- It applies the specific tax rate to each chunk and sums the total.
- It calculates the Medicare Levy (if you are a resident) and adds it to the total.
Frequently Asked Questions
How do I work out my residency status for tax purposes?
The ATO uses four specific tests to determine if you are a resident for tax purposes:
- The "Resides" Test: Do you reside in Australia according to ordinary
concepts?
- The Domicile Test: Is your permanent home in Australia?
- The 183-Day Test: Have you been in Australia for more than half the
income year?
- The Superannuation Test: For Australian government employees working
overseas.
Meeting any one of these generally makes you a tax resident.
What are the tax implications of residency?
Residents: Taxed on worldwide income, entitled to the tax-free threshold
($18,200), but generally pay the Medicare Levy.
Non-Residents: Taxed only on Australian-sourced income, no tax-free
threshold (tax paid from first dollar), but generally exempt from Medicare Levy.
What are some common situations regarding your residency status?
- New Migrants: Usually residents from the day they arrive to live
permanently.
- Working Holiday Makers: Often non-residents or subject to specific WHM
rates (15% up to $45k).
- Students (course > 6 months): Often considered residents.
- Australians working overseas temporarily: Typically remain residents if
they intend to return.
What is taxable income?
Taxable income is your Total Assessable Income (all wages, interest, dividends,
business income, rent, etc.) minus your Allowable Deductions (work-related
expenses, donations, cost of managing tax affairs, etc.). This is the final figure the ATO uses
to calculate your tax bill.
What is the "Stage 3" tax cut?
The Stage 3 tax cuts were a major reform to the Australian tax system that took effect on 1 July
2024. They simplified the tax brackets, reducing the 32.5% rate to 30% for a large income range
and increasing the threshold for the 37% bracket, effectively lowering tax for many Australians.
Do non-residents pay tax on all income?
Non-residents for tax purposes generally only pay tax on Australian-sourced income. Unlike
residents, they typically do not get a tax-free threshold, meaning they pay tax starting from
the first dollar earned.
Does this include HECS/HELP repayments?
No, this calculator only estimates base income tax and the Medicare levy. Study loan repayments
(HECS/HELP) are separate calculations based on your repayment income.
Why is my net income lower than expected?
Remember to account for the Medicare Levy (2%) which is added on top of your standard income
tax. This calculator includes that levy in the "Total Tax Payable" figure for residents.