How Australian Tax Brackets Work (and Why a Pay Rise Won't Cost You)

Short answer

Australian tax is progressive — you don't pay one flat rate on everything you earn. Each dollar is taxed according to the bracket it falls into. The big myth is that crossing into a higher bracket suddenly taxes your whole salary at the higher rate. It doesn't. Only the part above the threshold is taxed at the higher rate, which means a pay rise always leaves you with more money — never less.

The myth that scares people off pay rises

"I'd love to take that promotion, but won't it push me into a higher tax bracket and leave me worse off?"

This is the most common tax worry I hear, and it's almost always based on a misunderstanding. Australian tax brackets are marginal — a fancy way of saying each rate only applies to the slice of income that sits inside that bracket. Move up a bracket and only the extra dollars get taxed at the higher rate, not your whole salary.

Think of it like filling buckets, not flipping a switch.

How the brackets actually work (2025–26)

Here are the current resident tax rates. They exclude the 2% Medicare levy, which I'll cover in a moment.

"Taxable income" is what's left after deductions — not your gross pay. So if you earn $90,000 but have $2,000 in work-related deductions, you're taxed on $88,000.

A pay rise that "moves" you up a bracket

Let's say you're on $44,000 and get a $6,000 raise to $50,000. People worry the whole $50,000 now gets taxed at 30%. It doesn't.

• On the first $18,200: $0
• On $18,201 – $45,000: $4,288
• On the last $5,000 ($45,001 – $50,000): 30% = $1,500
• Total tax: $5,788

Only the final $5,000 is taxed at 30%. The first $45,000 keeps its lower rates. Out of that $6,000 raise you actually keep $4,500 — you're not losing money by earning more.

Marginal vs effective rate (the number that actually matters)

This distinction clears up most of the confusion.

• Marginal rate — the rate on your last dollar of income. It tells you how much tax you'll pay on any extra money (a pay rise, overtime, a second job).
• Effective rate — your total tax divided by your total income. It's the actual slice of your pay that goes to the ATO.

Worked example: Sarah earns $90,000.

Sarah's marginal rate is 30%, but her effective rate is only about 21.8% ($19,588 ÷ $90,000). That's the number worth remembering — you keep roughly 78 cents of every dollar you earn, even though your "tax bracket" says 30%.

What about the Medicare levy?

The 2% Medicare levy is a separate flat tax on top of your income tax, applied to most of your taxable income (with reductions at lower incomes). So when you're working out what a pay rise means for you, add 2% to your marginal rate. If your marginal rate is 30%, each extra dollar costs you roughly 32c including the levy.

Why this matters for families

Understanding brackets changes how you think about family money decisions:

• Returning to work after kids. A second income isn't taxed as one big lump — the first dollars still fall into the lower brackets (or the tax-free threshold if you're the lower earner). Sometimes the "is it even worth working after childcare?" maths looks better once you realise only the top slice is taxed at the higher rate.
• Overtime and side income. Any extra dollar is taxed at your marginal rate, so you know exactly how much you'll keep before you sign up for extra shifts.
• Salary sacrifice and extra super. Because contributions reduce your taxable income at the top end, salary sacrificing is most valuable when your marginal rate is higher — every dollar you sacrifice avoids tax at that higher rate.
• HELP/HECS repayments. These are calculated on top of your income tax as a percentage of repayment income, so a pay rise can also bump up your compulsory repayment. Worth knowing before you're surprised at tax time.

A small change is coming on 1 July 2026

One thing to tuck away: from 1 July 2026, the 16% rate on the $18,201–$45,000 bracket is due to drop to 15% (with the fixed amounts adjusting slightly too). It's a small cut, but the same income will attract slightly less tax next financial year. No action needed — just a heads-up.

The bottom line

Earning more never leaves you worse off in Australia. Only the extra dollars above a threshold are taxed at the higher rate, and the Medicare levy is the main add-on to remember. The next time someone tells you a pay rise "isn't worth it because of tax", you can confidently tell them the buckets don't work that way.