Expected a refund but received a tax bill? Here’s why
Expected a refund but received a tax bill? Here’s why
Many people expect a tax refund when they lodge their tax return, so receiving a tax bill can come as an unwelcome surprise.
In most cases, a tax bill doesn’t mean a mistake has been made. It usually means that not enough tax was paid throughout the year.
Below are some of the most common reasons.
1. You worked more than one job
If you worked for multiple employers during the year, there may not have been enough tax withheld from your pay. This can happen when you claim the tax-free threshold from more than one employer.
Generally, you should only claim the tax-free threshold from one employer. This will usually be the employer who pays you the most.
If you are currently claiming it from more than one employer, you can ask one employer to stop applying it. You can also ask your employer to withhold additional tax from your pay if needed.
2. You have a HELP or HECS debt
If you have a HELP or HECS debt, your compulsory repayment is based on your repayment income for the year.
From the 2025-26 financial year, compulsory repayments are calculated using marginal rates. This means that your repayment is calculated only on the income above the minimum repayment threshold.
For the 2025-26 year:
- No compulsory repayment applies if your income is $67,000 or less.
- If your income is between $67,001 and $125,000, the repayment rate is 15 cents for each $1 over $67,000.
Make sure your employer knows that you have a HELP debt. If you have multiple jobs or your income increases, you may also ask your employer to withhold additional tax from your pay.
3. You earned investment income
Interest from bank accounts, dividends from shares, managed fund distributions, and other investment income are generally taxable. However, little or no tax may be withheld before you receive this income.
Keep records of your investment income and provide them to your accountant at tax time. If you regularly receive investment income, consider setting aside some money to cover the possible tax.
4. You sold shares
Selling shares can result in a capital gain, which may mean additional tax is payable.
Before selling shares, consider speaking with your accountant so you understand the potential tax consequences. Make sure you keep records showing when you purchased and sold the shares.
5. You don’t have private health insurance
If your income exceeds certain thresholds and you don’t have an appropriate level of private health insurance, you may have to pay the Medicare Levy Surcharge.
The surcharge is in addition to the Medicare Levy that most taxpayers already pay and is calculated when your tax return is prepared.
If you only had appropriate private health insurance for part of the year, you may have to pay the surcharge for the days you were not covered.
Review whether private health insurance is right for your circumstances and ensure you have the correct level of cover if you wish to reduce or avoid the surcharge.
Keep in mind that reportable fringe benefits, such as certain employer-provided benefits, can increase the income used to calculate your HELP repayment and Medicare Levy Surcharge.
How can you reduce the risk of a tax bill?
Some simple steps can help:
- Only claim the tax-free threshold from one employer
- Tell your employer if you have a HELP or HECS debt
- Keep records of investment income and share transactions
- Review your private health insurance
- Ask your employer to withhold additional tax if needed
- Speak with your accountant if your income or circumstances change
The bottom line
A tax bill can be frustrating, but it’s often the result of changes to your income or not enough tax being withheld during the year.
If you’ve received an unexpected tax bill and aren’t sure why, contact your accountant. Understanding the cause now can help you avoid receiving another surprise tax bill next year.
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