Tax Return Estimator Australia 2025-26

How Is Your Tax Return Calculated?

Your Australian tax return is calculated by comparing the total tax withheld by your employer against your actual tax liability for the 2025-26 financial year. The ATO uses your assessable income, allowable deductions, and applicable offsets to determine the precise amount you owe or receive back.

Throughout the year, your employer withholds tax from each pay under the PAYG withholding system. This withholding is based on standard tax tables that assume a single income source and no deductions beyond the tax-free threshold. When you lodge your tax return, the ATO recalculates your liability using the actual figures.

The calculation follows 4 steps:

1. Determine assessable income — add all salary, wages, interest, dividends, and other income received during FY2025-26
2. Subtract allowable deductions — work-related expenses, self-education costs, and donation claims reduce your taxable income
3. Apply income tax brackets and offsets — the ATO calculates tax on your taxable income using marginal rates, then applies the "Low Income Tax Offset" (LITO) worth up to $700 and the "Medicare Levy" at 2%
4. Compare to PAYG withheld — the difference between your total tax liability and tax already withheld determines your refund or amount owing

Use our Income Tax Calculator to see the full breakdown of income tax brackets applied to your salary before estimating your return.

What Deductions Increase Your Tax Refund?

Claiming eligible deductions reduces your taxable income, which lowers your tax liability and increases your refund. Every $1 of deductions saves between $0.19 and $0.45 in tax depending on your marginal tax rate for FY2025-26.

You must have spent the money yourself, it must be directly related to earning your income, and you need records to prove it. Claims without receipts are limited to $300 total.

Salary sacrifice arrangements reduce your assessable income before tax. Use our Salary Sacrifice Calculator to compare take-home pay with and without salary packaging.

Who Uses This Tax Return Calculator?

This Australian tax return calculator is used by employees, freelancers, and retirees who want to estimate their refund before lodging through myTax. Over 13.6 million individual tax returns are lodged in Australia each financial year.

• 1PAYG employees checking whether their employer withheld the correct amount of tax, especially after starting a new role, receiving a pay rise, or working overtime
• 2Multiple-job holders who need to reconcile PAYG withheld across 2 or more employers — each employer withholds tax as if they are the sole income source
• 3Contractors and sole traders estimating quarterly BAS obligations and year-end tax liability using our Contractor Pay Calculator
• 4HECS-HELP debtors calculating whether their compulsory repayment reduces their refund — repayments start at incomes above $54,435 for FY2025-26
• 5Financial planners running scenarios for clients comparing deduction strategies, superannuation contributions, and salary sacrifice arrangements

What Is the Average Tax Refund in Australia by Income Level?

The average Australian tax refund is approximately $2,800 per individual, though this varies significantly by income bracket. Higher earners typically receive larger refunds in absolute dollars because each dollar of deductions saves more tax at higher marginal rates.

A taxpayer earning $85,000 with $2,500 in deductions and standard PAYG withholding typically receives a refund between $1,500 and $3,500. Taxpayers without private health insurance pay an additional "Medicare Levy Surcharge" of 1% to 1.5%, which reduces the refund. Use our Take-Home Pay Calculator to see your after-tax income including the Medicare levy and surcharge.

What Is the Difference Between a Tax Return and a Tax Refund?

A "tax return" is the form you lodge with the ATO reporting your income, deductions, and offsets. A "tax refund" is the money the ATO pays back to you when your employer withheld more tax than your actual liability.

Lodging a tax return does not always produce a refund. Approximately 25% of Australian taxpayers receive a bill rather than a refund, most commonly those with multiple income sources, investment income, or insufficient PAYG withholding.

Tax Return Deadlines for FY2025-26

The FY2025-26 tax return covers income earned from 1 July 2025 to 30 June 2026. Missing the lodgement deadline results in a failure-to-lodge penalty starting at $313 for every 28-day period the return is overdue, up to a maximum of $1,565.

• 1 JulNew financial year begins — income statements become available on myGov from mid-July as employers finalise payroll
• 14 AugMost employers have finalised income statements in myGov — the ATO pre-fills deduction data from health insurers, banks, and government agencies
• 31 OctDeadline to lodge your tax return if self-preparing through myTax
• 15 MayExtended deadline if lodging through a registered tax agent (you must be registered with the agent before 31 October)

What Are the Most Common Tax Return Mistakes?

The ATO adjusts approximately 1.8 million tax returns each year due to errors, omissions, and incorrect claims. Avoiding these 5 common mistakes protects your refund and prevents penalties.

1. Forgetting to declare all income sources — the ATO receives data from banks, employers, government agencies, and share registries. Omitting interest income above $1, dividend income, or government payments triggers automatic data-matching reviews.
2. Claiming private expenses as work deductions — the home-to-work commute, personal phone usage, and general clothing are not deductible. The ATO flags claims that exceed industry benchmarks, such as car expenses above $3,500 for office-based workers.
3. Not updating your tax file number (TFN) declaration — claiming the tax-free threshold from multiple employers simultaneously causes under-withholding. Only one employer applies the $18,200 tax-free threshold; additional employers must withhold at the "no tax-free threshold" rate.
4. Missing the Medicare Levy Surcharge — singles earning above $93,000 and families above $186,000 without private hospital cover pay the surcharge at 1% to 1.5%. Many taxpayers forget to account for this additional cost.
5. Lodging before employer data is finalised — lodging your return in early July before your employer has submitted income statements to the ATO results in missing pre-fill data. Waiting until mid-August ensures all income and deduction data is available.

Taxpayers carrying a HECS-HELP debt face an additional risk: compulsory repayments are calculated on your "Repayment Income", not your taxable income. Use our HECS-HELP Calculator to estimate your compulsory repayment amount before lodging.

Related Australian Tax Calculators

Estimating your tax return is one part of understanding your total pay. These calculators cover superannuation, take-home pay, salary sacrifice, and income tax brackets for FY2025-26.

Frequently Asked Questions