What Is a High-Interest Savings Account? How Bonus Interest Conditions Really Work

General information only. This article doesn't take into account your objectives, financial situation or needs, and isn't financial, tax or credit advice. Consider whether it's appropriate for you and, where relevant, read the PDS and TMD and talk to a licensed financial adviser or registered tax agent. Figures were checked against official sources on the date shown and can change.

If you've ever compared savings accounts, you've probably seen some impressive-looking interest rates. Then you open the account, and a few months later the interest that actually lands is much smaller than you expected.

Usually nothing dodgy has happened. You've just met the fine print. Many high-interest savings accounts pay their top rate only when you tick certain boxes each month. Miss one, and you can drop to a much lower rate without noticing.

This guide explains, in plain English, what a high-interest savings account is, how bonus interest conditions work, and how to check whether an account suits the way you actually save. It doesn't recommend any particular bank or account.

What is a high-interest savings account?

A savings account is a bank account designed for money you're putting aside rather than spending. According to Moneysmart, savings accounts usually earn more interest than other accounts, are often online-only and usually don't come with a debit card, so it's not as easy to dip into your money.

"High-interest" isn't an official category. It's a marketing label for accounts that pay a higher rate than a typical everyday transaction account. That's why they're a common home for an emergency fund and short-term goals: the money stays safe and reachable while earning some interest.

Some providers require you to open a linked transaction account with them as well, so you can move money in and out easily.

The three rates you'll see

The big number in an ad is often the headline rate: base plus bonus, sometimes plus an introductory boost. Moneysmart's advice on introductory rates is simple: always check what the interest rate will be after the introductory period ends.

How bonus interest conditions work

Each account sets its own rules, but they usually work month by month. The ACCC describes it this way: if you meet the conditions, you get the base rate plus the bonus rate (together, the headline rate). If the conditions aren't met, only the base rate applies for that month. Then the next month starts fresh.

Moneysmart gives two examples of bonus conditions: making regular deposits of $500 per month, or keeping a minimum balance of $5,000. Other conditions the ACCC lists include:

• Growing your balance by a certain amount each month.
• Making a minimum number of transactions, for example card purchases from a linked everyday account.
• Limiting withdrawals, sometimes to none at all during the month.

Moneysmart also suggests checking the maximum balance, since some accounts limit how much you can save in them. Read the definitions in the terms too. Small details, such as which day the month ends or which transfers count as a "deposit", can decide whether you get the bonus.

Why so many people miss out

In its Retail Deposits Inquiry, the Australian Competition and Consumer Commission (ACCC) looked closely at bonus interest accounts. Its final report, released on 15 December 2023, found that in the first six months of 2023, on average 71% of bonus interest accounts did not receive bonus interest in any given month.

Rates have changed since then, so don't read anything into those exact numbers. The lesson is the gap: an account with a great headline rate but conditions you regularly miss can pay less than a plainer account with a decent, unconditional rate.

Common reasons people miss out include an emergency withdrawal (which is exactly what an emergency fund is for), a payday that falls a day late, or forgetting a minimum number of card purchases.

How to choose an account that suits you

Start with how you actually behave, not how you hope you'll behave.

• If you add money every pay and rarely withdraw, an account with deposit or balance-growth conditions may suit you, as long as your automatic transfer reliably meets the minimum.
• If you'll need to withdraw sometimes (for example, it's your emergency fund), look hard at the base rate and at accounts without a "no withdrawals" condition.
• If you won't track conditions, a simpler account with fewer conditions may be the better fit, even if its headline rate is lower.

Moneysmart suggests comparing these features: the interest rate and how often it's paid, any bonus or introductory rate and its conditions, monthly fees, minimum and maximum balances, whether you need a linked account, how often you can withdraw, and whether regular deposits are required.

Comparison websites can help you build a list, but Moneysmart points out they're businesses that may make money from sponsored links or commissions, and most don't cover every product. Check the provider's own website and terms before you decide.

Make the conditions work on autopilot

If you do choose a bonus interest account, set it up so you don't have to remember anything:

1. Automate the deposit. Schedule a transfer on payday that comfortably exceeds any minimum deposit. Our three-bucket budget guide shows how to "pay Future You first".
2. Keep spending money elsewhere. Leave the savings account for saving, so you're not tempted into an accidental withdrawal.
3. Set a monthly reminder to check the interest that was paid. If the bonus didn't arrive, find out which condition you missed.
4. Review once a year. Moneysmart suggests reviewing your savings account every year, comparing it with others, and asking your bank whether it has a better account.

Is my money safe? And what about tax?

Deposits with banks, building societies and credit unions that are authorised deposit-taking institutions (ADIs) are protected by the government's Financial Claims Scheme up to $250,000 per account holder per ADI, according to APRA. You can check your provider on APRA's list of ADIs.

Interest is generally taxable. The ATO treats interest from bank accounts as part of your assessable income, so include it in your tax return. If you haven't given your bank your tax file number, it may withhold tax from your interest at the top rate. You can claim a credit for anything withheld when you lodge, but it's simpler to give your bank your TFN.

What about term deposits?

A term deposit locks your money away for a set time, which Moneysmart says is usually between one month and five years, at a fixed rate. That certainty can suit money you definitely won't need. But taking money out early can mean a penalty, reduced interest and up to 31 days' notice, so a term deposit isn't usually a good fit for an emergency fund.

Frequently asked questions

What is a high-interest savings account?

It's a savings account that pays a higher interest rate than a typical everyday transaction account. They're often online and usually don't come with a debit card, which makes the money a little harder to spend. Many advertise a headline rate that is made up of a low base rate plus a bonus rate you only get if you meet certain conditions.

How does bonus interest work?

The bank pays its base rate on your balance no matter what, and adds a bonus rate for any month you meet the account's conditions. Moneysmart gives examples such as making regular deposits of $500 a month or keeping a minimum balance of $5,000. The ACCC lists others, such as growing your balance by a set amount, making a minimum number of transactions or limiting withdrawals. The ACCC notes that if the conditions aren't met, only the base rate applies for that month. Check your account's terms for the exact rules.

Do many people miss out on bonus interest?

Yes, according to the ACCC. Its Retail Deposits Inquiry final report, released on 15 December 2023, found that in the first six months of 2023, on average 71% of bonus interest accounts did not receive bonus interest in any given month.

Is my money safe in a savings account?

Deposits with Australian banks, building societies and credit unions that are authorised deposit-taking institutions (ADIs) are protected by the Australian Government's Financial Claims Scheme up to $250,000 per account holder per ADI, according to APRA. You can check whether your provider is covered on APRA's list of ADIs.

Do I pay tax on savings account interest?

Generally, yes. The ATO treats interest from bank accounts as assessable income, so you need to include it in your tax return. If you don't give your bank your tax file number (TFN), it may withhold tax from your interest at the top rate. You can claim a credit for any amount withheld when you lodge your return.

Sources

Checked on 10 October 2026. Official sources are updated regularly, so follow the links for the latest figures.

1. Moneysmart (ASIC): Savings accounts (last updated 9 October 2026)
2. ACCC: Bank customers missing out on earning more interest from savings (media release, 15 December 2023)
3. ACCC: Retail deposits inquiry final report (December 2023)
4. APRA: Overview of the Financial Claims Scheme
5. APRA: List of authorised deposit-taking institutions
6. Moneysmart: Term deposits (last updated 14 July 2026)
7. Moneysmart: Using comparison websites (last updated 21 September 2026)
8. Moneysmart: Savings goals calculator
9. ATO: Investing in bank accounts and income bonds
10. ATO: TFN and ABN information for savings accounts and investments