It might seem minor, but that small amount of interest your savings account earns throughout the year can have a real impact on your tax return.

Many Australians are surprised to learn that bank account interest counts as taxable income, even if it’s just a few dollars.

If it’s not reported correctly, it can lead to delays in your return being processed, unexpected tax bills, or even ATO audits.

Why Is Interest Taxable?

Interest earned on bank accounts, term deposits, or online savings accounts is considered investment income by the Australian Taxation Office (ATO).

This income is added to your total taxable income for the year and is taxed at your marginal tax rate.

Even if the interest was automatically rolled back into your account and not physically withdrawn, it still needs to be declared.

Common Issues That Arise

1. Forgetting to Include It
   Many people miss reporting bank interest, especially from rarely used accounts or joint accounts. The ATO often receives data directly from banks, so if your return doesn’t match their records, you may be contacted for clarification.
2. Joint Accounts
   If you share an account, interest should be split according to ownership—often 50/50—but this depends on actual use and contribution. Incorrectly claiming 100% of the interest can lead to complications.
3. Children’s Accounts
   If a parent or guardian controls a child’s account and uses the funds, the interest may be attributed to the adult, not the child.
4. Higher Taxable Income
   Adding interest income might push your taxable income into a higher bracket, reduce your eligibility for certain benefits, or increase your Medicare Levy liability.
   

Tips to Stay on Track

• Keep a record of all bank accounts you hold, including joint or dormant ones.
• Check your interest statements or use the ATO’s pre-fill data.
  If unsure, speak with your accountant to ensure you’re compliant.
  

A few dollars in interest might not feel like much, but reporting it accurately avoids bigger headaches down the line.