Tax is the biggest single deduction from most Australians’ income, and the system is more learnable than the jargon makes it look. Get the handful of core ideas right, the brackets, the thresholds, and what you can legitimately claim, and you stop leaving money on the table at tax time.
This guide is the map. Each section gives you the short version and links to a full breakdown with real numbers, last checked June 2026. None of it is personal tax advice; it is the plain-English version, and the ATO is the source of truth.
How much tax you pay
Australia uses marginal brackets: each rate applies only to the income inside its band, not your whole income. See the tax brackets explained and use an income tax calculator to estimate your take-home pay.
The thresholds that catch people out
Two thresholds quietly shape your tax. The tax-free threshold decides how your pay is taxed across multiple jobs, and the Medicare levy and surcharge can make private health cover cheaper than the extra tax for higher earners.
What you can claim
Deductions are where most refunds are won or lost. The rules are simple: the expense must relate to earning your income, you must have paid it yourself, and you need a record. See tax deductions explained and, for the most common claim, working-from-home deductions.
A refund is not a windfall. It is your own money coming back because too much was withheld. The goal is to claim everything you are entitled to, not to inflate it.
Lodging your return
You can lodge yourself through myGov, or use a registered tax agent for a later deadline and a hand with anything complex. The how and when: how to do your tax return, when your return is due, and what a tax refund really is.
The bottom line
You do not need to love tax to stop overpaying it. Know your bracket, claim what you are entitled to with records to back it, and lodge on time. For the wider money picture around your tax position, a tool like Your Finance Guide helps you line up the rest, then read the section above that matches your question.