Australian income tax is deceptively simple at the headline level and genuinely complicated once the add-ons are included. The resident scale restructured from 1 July 2024 under the revised Stage 3 cuts, dropping the lowest rate to 16% and widening the 30% band all the way to AUD 135,000, so most taxpayers now sit on a flatter middle section than they did under the old 19% and 32.5% steps. Sitting on top of the rates are the 2% Medicare levy, the Medicare levy surcharge for higher earners without private hospital cover, and compulsory HELP or HECS study loan repayments, any of which can add several thousand dollars to a bill that looked fine on the bracket table alone. Pulling in the other direction is the low income tax offset, a non-refundable offset that phases out as income rises. Foreign residents are on a different footing entirely: no tax-free threshold, tax from the first dollar, and no Medicare levy. This calculator layers all of these so the number matches the ATO notice of assessment rather than just the bracket arithmetic.

Key Regulatory Parameters & Frameworks (YA 2026)

Rule 01

Resident Rates from 1 July 2024

Nil on the first AUD 18,200, then 16% from AUD 18,201 to AUD 45,000, 30% from AUD 45,001 to AUD 135,000, 37% from AUD 135,001 to AUD 190,000, and 45% above AUD 190,000. These replaced the previous 19%, 32.5%, and 37% structure and apply for the 2024-25 year onward. The tax-free threshold is pro-rated in a year you become or cease to be a resident.

Rule 02

Foreign Resident Rates

Foreign residents receive no tax-free threshold and are taxed from the first dollar: 30% up to AUD 135,000, 37% from AUD 135,001 to AUD 190,000, and 45% above AUD 190,000. They pay no Medicare levy and are not entitled to the low income tax offset, but they may need to provide a Medicare levy exemption certificate to claim the exemption on assessment. Working holiday makers are taxed under a separate dedicated scale.

Rule 03

Medicare Levy and Low-Income Shading

A 2% levy on taxable income funds the public health system. Low-income earners pay nothing below an indexed singles threshold in the region of AUD 27,000, with a shading-in range above it where the levy is charged at 10% of the excess until the full 2% applies. Higher family thresholds apply, increasing for each dependent child, and separate seniors and pensioners thresholds exist. Foreign residents and certain visa holders can be exempt.

Rule 04

Medicare Levy Surcharge

Taxpayers without an appropriate level of private patient hospital cover pay an additional surcharge of 1%, 1.25%, or 1.5% depending on income tier, once income for surcharge purposes exceeds roughly AUD 97,000 for singles and about AUD 194,000 for families, with the family threshold rising for each dependent child after the first. Income for surcharge purposes is a broader measure than taxable income and includes reportable fringe benefits and reportable employer super contributions, which catches many salary-packaged employees by surprise.

Rule 05

Study Loan Repayments and the Low Income Tax Offset

Compulsory HELP, VET Student Loan, and similar study loan repayments are collected through the tax system once repayment income exceeds the annual threshold, which moved to around AUD 67,000 alongside a shift to a marginal repayment structure where the rate applies only to income above the threshold rather than to the whole amount. Separately, the low income tax offset of up to AUD 700 reduces tax payable for lower incomes and phases out progressively, but being non-refundable it cannot generate a refund on its own.

Resident Tax Breakdown at AUD 80,000

Scenario Context: Australian tax resident with AUD 80,000 taxable income for the 2025-26 year, with private hospital cover in place and no study loan.

Calculation Stage	Computed Value
Tax on first AUD 18,200	NIL
Tax on AUD 18,201 - 45,000 (16%)	AUD 4,288
Tax on AUD 45,001 - 80,000 (30%)	AUD 10,500
Base income tax	AUD 14,788
Medicare levy (2%)	AUD 1,600
Medicare levy surcharge	NIL (private hospital cover held for the full year)
Low income tax offset	NIL (fully phased out at this income)

Final Deducted Result:Total liability of approximately AUD 16,388, an effective rate of about 20.5%, against a 30% top marginal rate. The same AUD 80,000 earned by a foreign resident would attract AUD 24,000 of tax and no Medicare levy.

Frequently Asked Questions (FAQ)

When does the Australian tax year end?▼

The income year runs from 1 July to 30 June. If you lodge your own return it is due by 31 October following the end of the income year. If you engage a registered tax agent and are on their client list before 31 October, you generally receive a later lodgment date, often as late as 15 May of the following year, provided your prior-year returns are up to date.

Why did I get a tax bill when my employer withheld PAYG all year?▼

PAYG withholding tables assume a single job, the tax-free threshold claimed once, and no additional liabilities. Shortfalls typically arise from a second job where the threshold was claimed twice, investment or side income with no withholding, the Medicare levy surcharge where private hospital cover lapsed mid-year, a compulsory study loan repayment that the employer did not withhold for, or capital gains. Division 293 tax can also add 15% on concessional super contributions for very high earners.

Can I claim the tax-free threshold on more than one job?▼

You should claim it from only one payer, normally your highest-paying job. Claiming it twice means both employers withhold as though the first AUD 18,200 is untaxed, leaving you underwithheld across the year and facing a bill at assessment. If you know you will be short, you can ask a payer to withhold an additional amount voluntarily using the upward variation arrangement.

How does residency for tax differ from immigration status?▼

They are separate questions. The ATO applies its own tests, principally the ordinary concepts residency test, supported by the domicile, 183-day, and Commonwealth superannuation fund tests, looking at where you actually live, your family and business ties, and your intentions. A visa holder can be an Australian tax resident from arrival, and an Australian citizen living abroad long term can be a foreign resident. Because residency determines both the tax-free threshold and whether worldwide income is assessable, the difference is worth several thousand dollars a year.