How is interest taxed on my savings account?

Just like any other source of income, interest you earn from a savings account is subject to tax.

12 April 2016: When you file your income tax return at the end of each financial year, you need to declare all your sources of income, including your salary and income earned from investments. If you have a balance in a savings account that has earned interest in the previous financial year, you’ll also need to declare this amount and pay tax on it.

But at what rate is the interest you earn taxed and how can you get the best possible investment returns from a savings account? Read on to find out.

Why do I need to declare interest?

Under its rules regarding investment income, the Australian Taxation Office (ATO) requires all Australian residents to declare any interest they receive as income. This includes:

  • Interest from savings accounts and term deposits held with banks, credit unions and building societies.
  • Interest received from a children’s savings account opened or operated by you.
  • Interest paid or credited to you by the ATO.
  • Life insurance bonuses (although tax offsets may be available).
  • Interest earned from foreign sources (although tax offsets may be available).

The interest you earn can be declared on your annual income tax return. Banks and other investment organisations are also required to report to the ATO details of the interest they pay to account holders and investors. The ATO then matches the investment income you report with the amount reported by your bank, and if there are any discrepancies your tax return will be adjusted and fines may apply.

Also, you don’t need to pay tax on the amount you deposit into your account as you will have already paid tax on this income.

At what rate is the interest taxed?

The amount of tax that applies to the interest you earn on your savings account will be determined by your overall taxable income. The total income you earn each year determines the tax rate you must pay, and the ATO’s tax rates for the 2015-16 financial year are shown below:

Taxable incomeTax you must pay on this income
$0 - $18,200Nil
$18,201 - $37,00019c for each $1 over $18,200
$37,001 - $80,000$3,572 plus 32.5c for each $1 over $37,000
$80,001 - $180,000$17,547 plus 37c for each $1 over $80,000
$180,001 and over$54,547 plus 45c for each $1 over $180,000
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Why should I provide my Tax File Number (TFN) to my bank?

When you open a savings account, your bank will give you the option of providing your TFN. While it’s not compulsory to do so, supplying your TFN is in your own financial best interests - if your bank doesn’t have your TFN, withholding tax may apply to the interest you earn on your account.

If you haven’t given your bank your TFN or if you’re a non-resident of Australia, the bank must withhold an amount from the interest you earn and send it straight to the ATO. This withholding tax is calculated at the top marginal tax rate of 45% plus the Medicare levy of 1.5%. For non-residents, the withholding tax rate is 10%. If your savings account earns more than $120 per year for adults (or $420 for children) during the financial year, withholding tax applies.

To avoid withholding tax, you can either supply your TFN when you apply for an account, or get in touch with your financial institution at any time to provide your TFN via internet banking, over the phone or at your nearest branch.

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What about interest earned in a joint account?

The ATO assumes that joint account holders are equal owners of an account and requires them to pay tax accordingly. For example, if you have a joint savings account with your spouse, the interest paid will be apportioned equally between the two account holders - 50% to the husband, 50% to the wife. Each person will then have to pay tax on 50% of the interest earned.

However, if the beneficial ownership of the account is not split up into equal shares, you’ll need to provide documentation that proves this fact to the ATO. The documentation must show the source of the funds, the proportion of contributions from each person, and who used the funds in the account and the interest received.

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What about interest earned on a children’s savings account?

One common point of confusion for many Australian taxpayers is the income tax requirements surrounding a child’s savings account. If a parent provides the funds for the child’s account and spends or uses the funds in the account as they wish, the parent must declare interest earned from the account on their own tax return.

However, in some cases the funds in the account will be made up of the child’s own money - for example, the child may deposit money given as a Christmas or birthday present, their pocket money, and funds they earn from a part-time job such as a paper round. If the funds in the account are not used by any person other than the child, the interest earned is classified as the child’s income. If the child’s only source of income is interest totalling less than $416 for the financial year, they will not have to file an income tax return.

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How do I find the best savings accounts for my tax needs?

  • Compare interest rates. The rate of interest will obviously play a huge role in determining how quickly you can grow your savings balance. Compare interest rates between accounts to see which ones offer the best deal.
  • Watch out for traps. Keep an eye out for some common traps attached to savings accounts. For example, an account may only offer the high interest rate advertised for a limited introductory period, while you may need to satisfy certain criteria (for example deposit a certain amount each month) in order to achieve the maximum rate of interest.
  • Look at all the account features. The interest rate isn’t the only factor that affects whether or not a savings account is right for you. Check for hidden fees and charges, whether you are able to access your funds at any time, and how you can manage your account before deciding on the right account.
  • Consider inflation. When considering the returns provided by a savings account, remember to take into account inflation as well as the tax you need to pay on interest. Factoring in the effects of inflation increases the overall effective tax rate on your savings balance, so it’s important to shop around for an account with a high rate of interest.
  • Use a comparison service. Comparison services like offer a quick and easy way for you to compare the interest rates, features and fees of multiple savings accounts. Start comparing a range of accounts today.
  • Ask your accountant for help. For any advice on savings account interest and how it will affect your income tax return, ask your accountant or financial adviser for expert assistance.

Shirley Liu

Shirley is's publisher for banking and investments. She is currently studying a Masters in Commerce (Finance) and is the author of hundreds of articles. She is passionate about helping Aussies make an informed decision, save money and find the best deal for their needs.

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