Want to estimate your tax refund before lodging your Australian tax return?
Your refund is not based on your salary alone. Your final tax outcome depends on your taxable income, eligible deductions, tax already withheld and other amounts that apply to your circumstances.
In simple terms, if you have paid more tax during the year than you ultimately owe, you may receive a refund. If you have paid less, you may have tax to pay. The ATO determines your final result after your tax return is lodged and assessed. (ATO guidance on multiple jobs and tax withheld)
What Is a Tax Return Estimate?
A tax return estimate is an approximate calculation of your expected tax outcome before your return is assessed.
A useful estimate considers:
- Your total assessable income
- Tax withheld from your income
- Eligible tax deductions
- Tax offsets
- Medicare-related amounts
- HELP or other study loan obligations
- Other taxable income
An estimate is not a guaranteed refund. Your actual result can change when all relevant information is included in your tax return.
What Information Do You Need to Estimate Your Tax Refund?
- Your Total Income
Start by identifying all income received during the financial year.
This can include:
- Salary and wages
- Income from multiple employers
- Bank interest
- Dividends
- Rental income
- Business or contractor income
- Capital gains
- Other taxable income
If you are an employee, your income statement is an important starting point. Income statements can be accessed through ATO online services linked to myGov and provide employment information such as income and tax withheld. (Accessing your income statement online)
If you have more than one employer, make sure income from all employers is considered.
- Tax Already Withheld
Your income statement can show how much tax was withheld from your employment income.
This amount is compared with your final tax liability when your return is assessed. If too much was withheld, you may receive a refund. If too little was withheld, you may have an amount to pay.
You can also use the ATO Tax Withheld Calculator to estimate withholding amounts.
- Eligible Tax Deductions
Eligible deductions can reduce your taxable income.
Depending on your circumstances, these may include certain:
- Work-related expenses
- Working-from-home expenses
- Work-related education expenses
- Professional memberships
- Donations
- Investment-related expenses
- Tax agent fees
Not every expense is deductible. You need to meet the relevant ATO requirements and keep records supporting your claim. The ATO explains that allowable deductions reduce taxable income.
How Is an Australian Tax Return Calculated?
A simplified way to understand calculating your tax return is:
Assessable income − allowable deductions = taxable income
Your taxable income is then used to determine your tax liability. Other amounts, such as applicable Medicare-related amounts, offsets and study loan obligations, can also affect the result.
Your tax already withheld is then taken into account.
In simple terms:
Tax withheld is higher than final liability = potential refund
Tax withheld is lower than final liability = potential amount payable
This is why two people with similar salaries can receive different tax outcomes.
Why Can My Tax Refund Estimate Change?
An initial estimate can change when additional information is included.
You Had More Than One Job
Having multiple employers can affect your withholding and final tax position.
The ATO considers your combined income and tax withheld when your annual return is assessed. This can result in a refund or an amount payable depending on your circumstances. (ATO guidance on multiple jobs)
You Received Other Income
Bank interest, dividends, rental income, business income and capital gains can change your taxable income.
Leaving out additional income can make a tax return estimate inaccurate.
Your Deductions Change
An estimate based on assumed deductions can change when your actual expenses and records are reviewed.
Remember, a deduction does not normally mean you receive the entire expense back. A deduction generally reduces taxable income.
You Have a HELP Debt
A HELP or other study loan obligation can affect your final tax outcome.
From the 2025-26 income year, compulsory study and training loan repayments are calculated using the new marginal-rate system. The ATO calculates the compulsory repayment using repayment income, which can include amounts beyond taxable income. (ATO study and training loan guidance)
D & B Accountants also explains how HELP debt can affect an expected tax refund in its guide to HELP debt and your Australian tax return.
Can I Estimate My Tax Return From My Income Statement?
Yes, but an income statement alone cannot guarantee your final refund.
Your income statement provides important employment information, including income and tax withheld. However, your complete tax return may also include deductions, investment income, rental income, capital gains, offsets and other obligations.
For a straightforward employee with one employer, it can provide a useful starting point.
For someone with several income sources or more complex tax affairs, additional information is required.
Simple Tax Refund Example
Consider an employee with:
- $75,000 employment income
- Tax withheld throughout the year
- Eligible work-related expenses
- Bank interest
You cannot calculate the refund simply by applying a percentage to the $75,000 salary.
The calculation needs to consider total income, allowable deductions, taxable income, tax liability and tax already withheld.
If the final liability is lower than the amount withheld, the difference may be refunded. If the liability is higher, the taxpayer may need to pay the difference.
Common Tax Return Estimation Mistakes
Avoid these common mistakes:
- Looking only at salary and ignoring other income.
- Assuming tax withheld equals your final tax liability.
- Claiming expenses that do not qualify as deductions.
- Forgetting bank interest or investment income.
- Forgetting capital gains.
- Ignoring HELP or other study loan obligations.
- Assuming every deduction produces a dollar-for-dollar refund.
- Treating an online estimate as a guaranteed ATO result.
Accurate records make it easier to prepare a reliable tax return.
How to Get a More Reliable Tax Return Estimate
Before relying on an estimated refund:
Check your income. Review your income statement and identify additional income.
Check tax withheld. Make sure information from all relevant employers is included.
Review deductions. Only claim expenses you are entitled to claim and can substantiate.
Check your ATO information. Review available pre-filled information before lodging.
Consider other obligations. Check whether HELP, Medicare or other amounts could affect your result.
Get professional help when needed. More complex income, investments, rental property or capital gains may require professional tax advice.
D & B Accountants provides Individual Tax Return services for eligible PAYG income situations.
You can also read How to Choose the Right Tax Accountant for Your Individual Tax Return in Australia for guidance on selecting professional tax assistance.
Frequently Asked Questions
How can I estimate my tax refund?
Start with your total income and tax withheld. Then consider eligible deductions, offsets and other amounts that may affect your tax position. Your final refund is determined by the ATO after assessment.
Is a tax return estimate guaranteed?
No. An estimate is an indication only. Your final result can change when all income, deductions and other relevant information are included.
Does my income statement show my tax refund?
No. An income statement shows employment information such as income and tax withheld. It does not show your final refund.
Why did I receive a tax bill instead of a refund?
You may receive a tax bill when the tax withheld during the year is lower than your final tax liability. Multiple jobs, additional income and study loan obligations can contribute to this outcome.
Can deductions increase my tax refund?
Eligible deductions can reduce taxable income and may reduce your final tax liability. However, a deduction does not normally mean you receive the full expense back.
Final Takeaway
If you want to estimate your tax return in Australia, start with your total income and tax withheld. Then consider eligible deductions, other income and any HELP, Medicare or other amounts that may apply.
Online calculators can provide a useful indication, but your actual refund or amount payable depends on your complete tax position and the ATO’s assessment.
If your tax affairs are more complicated than a straightforward PAYG return, professional assistance can help you prepare an accurate return and understand your expected tax outcome.
D & B Accountants Pty Ltd provides tax and accounting services to individuals and businesses across Australia, with offices in Pakenham, Victoria and Hobart, Tasmania.