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The Highest Rate Isn’t Always the Highest Rate

The Highest Rate Isn't Always the Highest Rate

Why chasing the advertised savings rate can cost you more than it earns you

Every few months a client sends me a screenshot of a savings account advertising “5.5% interest!” and asks why they're not earning that. Almost every time, the answer is the same: they're looking at the maximum rate, not the rate they'll actually get.

High-interest savings accounts in Australia are almost never one number. They're two numbers stitched together; a base rate that applies to everyone, and a bonus rate that only applies if you jump through a specific set of hoops every single month. Miss one hoop, and you fall straight back to the base rate for that month. Sometimes the next month too.

The problem is the base rate is often so low it's basically a rounding error. So the account that looks the most generous on a comparison table can quietly be the least generous account you own, in any month where life gets in the way.

A live example: ING Savings Maximiser

ING's Savings Maximiser currently advertises up to 5.50% p.a. on balances up to $100,000. Sounds great; until you look at how it's built:

- Base rate: 0.01% p.a. (yes, one hundredth of one percent)
- Bonus rate: 5.49% p.a., on top of the base, only if you meet all three of these in a calendar month:

1. Deposit at least $1,000 from an external source into an Orange Everyday, Savings Maximiser, Savings Accelerator, Personal Term Deposit, ING Personal Loan or ING Home Loan in your name
2. Make 5 or more settled (not pending) eligible ING card purchases
3. Grow your nominated Savings Maximiser balance that month (excluding interest earned)


And here's the sting most people miss: even if you nail all three conditions, the bonus rate doesn't apply that month; it applies the following calendar month. So there's always a one-month lag between doing the right thing and getting paid for it.

Fail any one of the three in a given month, and that account earns 0.01% for the following month. On $100,000, that's about 83 cents in interest for the month, instead of roughly $458.

The alternative: no conditions at all

Macquarie's Personal Savings Account currently pays 5.00% p.a., flat, on balances up to $2 million. No deposit minimum, no card-spend quota, no “grow your balance” test. You get 5% whether you're actively managing the account or you forgot it exists for three months.

It's not the headline rate. But it's the rate you actually get, every month, without having to think about it.

So how many bad months does it take?

Using a $100,000 balance (ING's cap) and comparing a full year:

Meet the ING conditions perfectly, all year, and you finish around $500 ahead of Macquarie on $100k, that's the number on the comparison website.

Miss the bonus just once across the year and your advantage shrinks to about $42. Miss it a second time, and Macquarie has already overtaken ING for the full year, by roughly $415.

Put another way: an account requiring 36 separate conditions to be met correctly across a year (three conditions, twelve months) only needs to fail twice before the “no hoops” account wins outright. And that's before accounting for the one-month lag working against you, or for balances sitting above $100,000, which earn ING's 0.01% regardless of what you do.

The point isn't “ING bad, Macquarie good”

Both are legitimate accounts and this isn't advice to move your money, it's a maths lesson in what “up to X%” actually means. If you're disciplined, watch your card spend, and won't need to touch the balance mid-month, the ING structure can genuinely pay more. If your income or spending is even slightly irregular, which describes most people, most years, a lower rate with zero conditions can easily out-earn the “higher” rate advertised everywhere.

The rate that matters isn't the one in the ad. It's the one you'll actually earn in your worst month, twelve times a year.

Rates and conditions current as of September 2026 and subject to change — always check the current PDS before opening or comparing accounts.

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