Why Is My Tax So High In Australia?

Before deciding your tax is too high, it helps to know what "correct" looks like. For 2026-27, residents pay nothing on the first $18,200, 15% from $18,201 to $45,000, 30% to $135,000, 37% to $190,000 and 45% beyond that (ATO resident tax rates), with a 2% Medicare levy on top for most people. The 15% rate is new — it replaced 16% on 1 July 2026, with a further cut to 14% legislated for July 2027 (ATO: new tax cuts).

Two features of the system surprise people. First, only the dollars inside each bracket are taxed at that bracket's rate — crossing $45,000 does not re-tax your first $45,000. Second, your payslip shows withholding, which is your employer's estimate of the annual bill spread across pays. When the estimate runs hot, the money is not lost; it is credited back when you lodge.

Here is a full decomposition of an $85,000 salary for 2026-27, both annually and per fortnight, with and without a HELP debt. Every figure follows directly from the brackets above: $26,800 taxed at 15% is $4,020, plus $40,000 taxed at 30% is $12,000, giving $16,020. The Low Income Tax Offset is gone by this income, and the Medicare levy is a flat 2%.

2026-27 resident rates, tax-free threshold claimed, no salary sacrifice or offsets. HELP repayment is 15c per dollar of income above $69,528. Fortnightly figures are annual amounts divided by 26; real withholding tables round slightly differently.

The overall effective rate here is 20.8% — or 23.6% with a study loan. If your deductions land near these proportions, your pay is being taxed correctly and the answer to "why so high" is simply that this is what $85,000 costs. If they land meaningfully above, something in the next section is the culprit.

Four settings account for nearly every genuinely over-taxed payslip:

• The tax-free threshold isn't claimed. If you didn't tick the box on your TFN declaration, withholding starts from your first dollar (ATO: claiming the tax-free threshold). On a modest wage that alone strips thousands a year from take-home pay.
• No TFN on file. Employers must withhold 47% of every dollar when they hold no tax file number. If nearly half your pay is vanishing, this is almost certainly why — and it is fixed with one form.
• A bonus or big overtime week. Withholding tables annualise each pay: a $5,000 bonus is briefly taxed as though you earn it every cycle. There are employer methods to smooth this, but many payroll systems don't bother.
• A second job. Second employers withhold at no-threshold rates from dollar one by design. Check what each pay should look like with the PAYG withholding calculator.

Quite possibly, and it is the deduction people most often forget they signed up for. In 2026-27 the repayment system is marginal: you repay 15c of each dollar of repayment income above $69,528. At $85,000 that is the $2,321 in the table — about $89 a fortnight that a debt-free colleague on identical pay keeps.

The sharper effect is on your next dollar. Between $69,528 and $135,000, each extra dollar loses 30c income tax, 2c Medicare levy and 15c HELP — 47c in the dollar. That is why a pay rise or overtime can feel strangely thin with a study loan: you are briefly experiencing the top marginal rate on middle income. It is still worth earning the dollar, and every repayment cent reduces a real debt, but it explains the payslip. If your employer doesn't know about the loan — you didn't tick the STSL box — nothing extra is withheld and the whole year's repayment lands as a bill at assessment, which is the opposite problem.

No. Withholding is a prepayment, not a final tax. At assessment the ATO calculates your actual liability from total income, subtracts every dollar withheld across all payers, and refunds the difference — automatically, into your nominated account, usually within a couple of weeks of lodging. A year of no-threshold withholding on a $40,000 wage, for instance, prepays several thousand dollars more than the true bill, and all of it comes back.

The real cost of over-withholding is timing: it is an interest-free loan to the Commonwealth for up to fourteen months. That is why the settings are worth fixing now rather than treating the July refund as a savings plan. To see what your correct annual figure should be, run your salary through the income tax calculator and compare it with your year-to-date deductions.

1. Effective rate: divide total deductions by gross pay. Around 21% at $85,000 (24% with HELP) is correct; 30%-plus at that income means a setting is wrong.
2. Threshold status: confirm your main employer has the tax-free threshold claimed — payroll can tell you in one email.
3. TFN lodged: if withholding is near 47%, hand in a TFN declaration today.
4. STSL flag: matches reality — on if you have a HELP debt, off if you have finished paying it (people overpay for months after clearing a loan).
5. One-off spikes: if a bonus month looks savage, check the following normal month before panicking — annualisation corrects itself.
6. Super isn't a deduction from you: the 12% superannuation guarantee is paid on top of gross salary, not out of it. More payslip line items are explained in Australian tax facts.