Simple Explanation of Tax in Australia

Simple explanation of tax in Australia

This guide provides a clear, plain‑English explanation of how tax works in Australia.

It is designed for people who are new to tax returns, new to Australia, or who have always found tax confusing.

Video: simple explanation of tax in Australia

If you prefer, you can also watch a short video explaining how tax works in practical terms.

How tax works in Australia (the basics)

In Australia, you do not pay tax on all the money you earn. You pay tax on your
taxable income.

Taxable income is worked out using this simple formula:

Taxable income = Income – Deductions

What counts as income?

Income includes money you earn during the financial year, such as:

  • wages and salary
  • business or sole trader income
  • rental income
  • interest and dividends

What are deductions?

Deductions are expenses you incur in earning your income.

Common examples include:

  • work‑related car and travel expenses
  • uniforms and protective clothing
  • union fees and professional memberships
  • courses or training related to your work
  • working‑from‑home expenses

You should only claim deductions that relate directly to earning your income and keep records or receipts where required.

Australia’s progressive tax system

Australia uses a progressive tax system.

This means:

  • lower parts of your income are taxed at lower rates
  • higher parts of your income are taxed at higher rates
  • you do not pay one flat tax rate on all your income

Each extra dollar you earn is taxed at your marginal tax rate, not your average rate.

Use the ATO’s resident tax‑rates page (this page is updated by the ATO and covers current and future years):

ATO – Tax rates for Australian residents

Why deductions reduce your tax

The value of a deduction depends on your marginal tax rate.

For example, if your marginal tax rate is 30%, then:

Each $1 claimed as a deduction reduces your tax by 30 cents.

How tax refunds are calculated

Your tax return compares:

  • the tax calculated on your taxable income
  • the tax already paid during the year (for example, from wages)
  • any tax offsets you are entitled to

If too much tax was paid during the year, you receive a refund.
If too little tax was paid, you may have tax to pay.

A tax refund is not a bonus — it is simply a reconciliation of tax paid versus tax owed.

Important things to know

  • Australia’s financial year runs from 1 July to 30 June
  • The Australian Taxation Office (ATO) administers the tax system
  • Most people lodge their tax return by 31 October
  • If you use a registered tax agent, later lodgement dates may apply

Getting help with your tax return

Many people choose to use a registered tax agent to help prepare their tax return.

A tax agent’s fee is tax‑deductible, and professional assistance can reduce errors, missed deductions, and future issues.

You can find more information here:


Individual tax return services