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Offset accounts offer customers a financial benefit relative to other forms deposits. To illustrate the
benefit from offset accounts, the above example is extended with the following assumptions:
• the person is earning a salary of $100,000 per annum with a marginal tax rate of 32.5 cents,
and
• instead of offsetting the mortgage balance, the person places the $50,000 into a 12-month
Term Deposit at 4.7%.
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Under this scenario, the net interest benefit to the customer is $1,586.25
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at the end of the twelve-
month contract period.
In comparison in the scenario where the $50,000 is offsetting the mortgage, interest saved under the
offset arrangement was the $3,345. Therefore, the customer achieves a $1,785.75 benefit under the
offset arrangement relative to the Term Deposit in the 12-month period.
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Savings products
Bonus savings accounts
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typically offer higher interest if the customer or account meets certain
conditions (e.g., a specified amount is deposited each month, or a customer belongs to a particular
demographic). During the recent period of a rapidly rising target cash rate, bonus saving products
showed a similar rapid increase in interest rates.
The average interest paid in March 2023 on bonus savings accounts was 4.20%, offering a premium of
60 basis points over the cash rate. Based on data from RBA statistical series F4, interest for bonus
savings accounts grew at a faster rate throughout late 2022 than online savings accounts, Figure 1. Of
the 609 savings products on the market (162 of which are also classified as a transaction account) 158
have conditional bonus.
Figure 1: Retail deposit interest rates, Savings accounts, January 2004 – March 2023, %
Source: RBA Retail deposit and investment rates – Statistical series, Table F4; ABA analysis
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Rate based on AMP Bank offer of 4.7% on 12 month Term Deposit, https://www.canstar.com.au/compare/term-
deposits/?amount=$50,000&profile=Personal&term=11+-+24+months ABA accessed 18-May-23
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This calculation is undertaken as follows:
• Interest income is $2350 as calculated by Canstar https://www.canstar.com.au/calculators/term-deposit-calculator/ ABA accessed 18-
May-23
• LESS Income Tax of $763.75 at the marginal rate of tax of 32.5 cents
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This example has been simplified and does not consider the complex financial situations of bank customers. It is intended for illustrative
purposes only.
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Bonus savings accounts are distinct from accounts that offer introductory rates.
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