Bonus Interest Savings Accounts Explained — How Conditional Rates Work
This article provides general information only and does not constitute financial advice. For advice tailored to your situation, consult a licensed financial adviser. Learn more.
Contents
Most high-interest savings accounts in Australia are conditional bonus rate accounts. The advertised rate is not what you automatically earn — it is the maximum rate you can earn if you meet a set of conditions every calendar month.
Understanding how bonus interest works is essential to making the most of your savings.
How Bonus Interest Works
A bonus interest account has two components:
- Base rate: applies to your balance automatically, regardless of conditions. Usually very low — often below 1% p.a.
- Bonus rate: added on top when you satisfy monthly conditions. This is the bulk of the advertised rate.
Example:
A bank advertises a savings account at 5.00% p.a.:
- Base rate: 0.50% p.a.
- Bonus rate: 4.50% p.a. (when conditions are met)
If you meet conditions, you earn 5.00%. If you miss one condition, you earn just 0.50% for that month.
Common Conditions
| Condition | What it means |
|---|---|
| Minimum monthly deposit | Deposit a set amount (e.g., $1,000) into the account or a linked account |
| Card transactions | Make a minimum number of settled purchases with a linked debit card (e.g., 5 per month) |
| Balance growth | End-of-month balance must be higher than start-of-month balance |
| No withdrawals | Make no withdrawals from the savings account during the month |
| Account age | Introductory bonus rate only applies for the first 3–5 months |
Banks vary significantly in which conditions they use. Some are easy to meet (a single deposit). Others require active effort each month.
What Happens If You Miss Conditions
If you miss a condition in a given calendar month, you typically:
- Earn only the base rate for that month
- Automatically return to earning the bonus rate the following month if conditions are met again
- Do not lose prior interest already earned
Missing one month doesn’t ruin your overall return permanently, but missing multiple months significantly reduces your effective annual return.
Calculating Your Effective Return
If you earn the bonus rate 10 out of 12 months and the base rate for 2 months:
| Rate | Months | Contribution to annual return |
|---|---|---|
| 5.00% (bonus months) | 10 | 5.00% × 10/12 = 4.17% |
| 0.50% (base months) | 2 | 0.50% × 2/12 = 0.08% |
| Effective annual rate | ~4.25% |
This is why consistently meeting conditions matters — two missed months can reduce your effective return by nearly 0.75 percentage points in this example.
Tips to Consistently Meet Conditions
- Set up a salary credit into the account (or a linked everyday account) — this automatically satisfies a deposit condition for most working Australians
- Use the linked debit card for grocery shopping or subscriptions to rack up the minimum number of transactions
- Automate: set up automatic transfers on the 1st of each month to ensure conditions are met early
- Calendar reminders: if conditions are easy to forget, set a reminder mid-month to check
- Understand the reset: conditions usually reset on the 1st of each calendar month
Introductory vs Ongoing Bonus Rates
Some accounts advertise a higher rate that only applies for the first few months (commonly 3 or 5 months) for new customers. After this introductory period, the rate reverts to the standard ongoing rate.
Before opening an account, check:
- Is the advertised rate an introductory rate or the ongoing rate?
- What is the ongoing rate after the intro period?
- Do you need to be a new customer to qualify?
Some banks restrict introductory rates to people who have not held that account type in the past 12–24 months.
Balance Caps on Bonus Rates
Some accounts only pay the bonus rate on balances up to a maximum (e.g., $250,000 or $500,000). Balances above the cap earn the base rate.
If you have a large balance, check whether the bank has a balance cap — and whether splitting across multiple banks (or account types) might maximise your return while staying within FCS deposit protection limits.
FAQ
Can I withdraw from a bonus savings account? Yes — unless the condition specifically prohibits withdrawals that month. If withdrawal-free is a condition, taking money out removes the bonus for that entire calendar month. Check the product’s terms.
Does the deposit condition mean I need to bring in new money? Not always. Some banks only require that a deposit occurs into the account (or a linked account) — your salary being deposited qualifies. Others require you to increase your balance. Read the specific conditions carefully.
Is there a limit on how many bonus savings accounts I can have? There is no legal limit. Many Australians hold accounts at multiple banks. Note that each institution has a separate $250,000 FCS deposit protection limit.
See also: Best High Interest Savings Accounts Australia | Savings Account vs Term Deposit
For personalised savings advice, speak with a licensed financial adviser via MoneySmart.