How This Australian Tax Return Estimate Is Calculated
Your Australian tax return result depends on several components stacked together: progressive income tax brackets, the Low Income Tax Offset (LITO), the Medicare levy (and surcharge, if applicable), and any compulsory HELP/HECS repayment. The ATO compares your total liability against tax already withheld from your pay (PAYG) to determine your refund or bill.
📋 2025/2026 Resident Income Tax Brackets
| Taxable Income | Tax Rate | Tax on This Bracket |
|---|---|---|
| $0 – $18,200 | 0% | Nil |
| $18,201 – $45,000 | 16% | 16c for each $1 over $18,200 |
| $45,001 – $135,000 | 30% | $4,288 + 30c for each $1 over $45,000 |
| $135,001 – $190,000 | 37% | $31,288 + 37c for each $1 over $135,000 |
| $190,001+ | 45% | $51,638 + 45c for each $1 over $190,000 |
🎟️ Low Income Tax Offset (LITO) — 2025/2026
| Taxable Income | LITO Amount |
|---|---|
| $0 – $37,500 | $700 (maximum) |
| $37,501 – $45,000 | $700 minus 5c for each $1 over $37,500 |
| $45,001 – $66,667 | $325 minus 1.5c for each $1 over $45,000 |
| $66,668+ | Nil |
🎓 HELP/HECS Marginal Repayment Bands — 2025/2026
| Repayment Income | Repayment Rate |
|---|---|
| $0 – $67,000 | Nil |
| $67,001 – $125,000 | 15% of the amount over $67,000 |
| $125,001 – $179,285 | $8,700 plus 17% of the amount over $125,000 |
| $179,286+ | 10% of total repayment income |
From 1 July 2025, HELP repayments switched from a flat whole-of-income percentage to this marginal system, removing the old "cliff" effect at each threshold.
🔑 Key Terms Explained
PAYG Withholding: Tax your employer deducts from each pay and sends to the ATO on your behalf throughout the year, based on ATO withholding schedules and your declared circumstances (e.g. HELP debt, tax-free threshold claim).
Taxable Income: Your assessable income (salary, wages, investment income, etc.) minus allowable deductions. This estimator treats your input as the final taxable income figure.
LITO: A non-refundable tax offset that directly reduces your tax payable (not your taxable income), targeted at low and middle income earners.
Refund vs Tax Bill: If your PAYG withholding during the year exceeds your final calculated liability (tax + Medicare + HELP), you receive the difference as a refund. If withholding fell short, you'll owe the ATO the shortfall.
💡 Example: $85,000 Income, $19,500 Withheld, No HELP Debt
1. Gross Income Tax: $4,288 + 30% × ($85,000 − $45,000) = $4,288 + $12,000 = $16,288
2. LITO: Income exceeds $66,667, so LITO = $0
3. Income Tax Payable: $16,288
4. Medicare Levy: Income is above $35,013, so full 2% applies: $85,000 × 2% = $1,700
5. Total Liability: $16,288 + $1,700 = $17,988
6. Tax Withheld: $19,500
7. Estimated Refund: $19,500 − $17,988 = $1,512
If this taxpayer also had a HELP debt, a further $2,700 (15% × $18,000 over the $67,000 threshold) would be added, turning the refund into a tax bill instead.
⚠️ Important Notes
— This estimator assumes no work-related deductions beyond what's already reflected in your taxable income figure — real returns often include deductions that change the final result.
— Medicare levy here uses the single, non-senior threshold; families and seniors should also check the dedicated Medicare Levy Calculator for family/SAPTO thresholds.
— Other offsets (e.g. private health insurance rebate adjustments, spouse offsets, or business income concessions) are not modelled here.
— Foreign residents have no tax-free threshold, different brackets, and generally don't pay the Medicare levy or LITO.
— For an official assessment, use ATO myTax or a registered tax agent.