Income Tax in Australia

🧾 How Income Tax Works in Australia🔗

The basic idea is simple: you earn money, the government takes a cut, and that cut funds roads, hospitals, schools, and everything in between. In practice, most Australians never write a cheque to the ATO. Instead, your employer handles it automatically through the Pay As You Go (PAYG) withholding system. Each pay cycle, your employer estimates how much tax you owe for the year and withholds that amount before your money hits your bank account.

At the end of the financial year you lodge a tax return. The ATO compares what was withheld against what you actually owe. Withheld too much? You get a refund. Not enough? You pay the difference. The other thing to understand is that Australia's system is progressive: the rate increases as your income increases, but the higher rate only applies to the dollars above each threshold. Your first $18,200 is always tax-free, no matter how much you earn overall.

📊 The 2026-27 Tax Brackets🔗

The Stage 3 tax cuts took effect from 1 July 2024. Here are the rates for Australian residents. Each rate applies only to the slice of income within that band.

Here's how tax works on a $90,000 salary. Notice that no single rate applies to the whole amount: the first $18,200 is tax-free, the next slice is taxed at 15%, and only the slice above $45,000 is taxed at 30%.

Total income tax before offsets is $17,520, an effective rate of 19.5%, even though the marginal rate (the rate on the last dollar) is 30%. People often confuse these two, which is why a pay rise never actually leaves you worse off. We go deeper in our full guide to tax brackets and marginal rates.

✅ The Tax-Free Threshold🔗

The tax-free threshold means the first $18,200 of your income each year is completely tax-free, and every Australian resident is entitled to it. When you start a job, your employer gives you a Tax File Number declaration, and one question asks whether you want to claim the threshold. Claim it, but only with one employer. If you claim it with two employers at once, neither withholds enough tax and you'll get a bill at tax time. Our tax-free threshold guide covers second jobs and starting mid-year.

🏥 The Medicare Levy (and Surcharge)🔗

On top of income tax, most Australians pay the Medicare levy: 2% of taxable income, which funds the public health system. For someone on $90,000, that's an extra $1,800 a year. Low-income earners get a reduction or full exemption (for 2025-26, singles below about $28,011 pay a reduced levy or none).

The Medicare Levy Surcharge is separate: it applies to higher earners (singles over $97,000) who don't hold private hospital cover, adding 1% to 1.5% on top. For many people in that range, a basic hospital policy is cheaper than the surcharge. See our guide on the Medicare Levy Surcharge.

🔻 Taxable Income and Deductions🔗

Before the ATO works out your tax, it needs your taxable income. Assessable income is everything you earn (salary, freelance, investment income, rent, interest, dividends). Taxable income = assessable income minus deductions.

Deductions reduce the income you're taxed on, but they're not a dollar-for-dollar saving: a $1,000 deduction saves you $1,000 times your marginal rate ($300 in the 30% bracket). Common categories include work-related expenses, self-education, charitable donations to registered DGRs, and investment expenses. The golden rule: you need a record to claim it. Our tax deductions guide covers what you can and can't claim.

⚖️ Tax Offsets vs Deductions🔗

This trips a lot of people up. Deductions reduce your taxable income (applied before tax is calculated). Offsets reduce your actual tax bill (applied after, as a direct dollar-for-dollar reduction). An offset is more powerful, dollar for dollar, than a deduction of the same size.

📅 How and When to Lodge Your Tax Return🔗

The financial year runs 1 July to 30 June. After 30 June you have until 31 October to lodge yourself via myGov/myTax, the ATO's free online system that pre-fills a lot of your information. Using a registered tax agent gives you an extended deadline (usually to May the following year) and typically costs $100 to $300+, worth it if you have investment properties, multiple income streams, or complex deductions.

Miss the deadline and the ATO charges a Failure to Lodge penalty of $313 for each 28-day period you're late, up to $1,565. Lodge on time even if you can't pay immediately: the ATO has payment plans. Our step-by-step lodging guide walks you through it.

⚠️ Common Tax Mistakes Australians Make🔗

• Not claiming the tax-free threshold (or claiming it twice). Either mistake costs you: lower take-home pay all year, or a surprise bill.
• Missing legitimate deductions. Work-from-home costs, professional memberships, union fees, income protection premiums get forgotten constantly.
• Forgetting to include all income. Side hustle income, interest, dividends, rent all need to go in. The ATO already receives this data.
• Lodging late. The $313-per-28-days penalty is entirely avoidable. Set a reminder for 31 October.
• Keeping no records. The ATO can audit up to five years back. If you can't prove a deduction, you can't keep it.
• Overclaiming. The ATO's data-matching is sophisticated. Claim what you're genuinely entitled to, with receipts.

🎯 The essential: For most Australians, tax is far less scary than it looks. Claim the tax-free threshold with one employer, keep records of your deductions through the year, lodge by 31 October, and you're most of the way there.

❓ Frequently Asked Questions🔗