Bonus interest: the fine print

A savings account with bonus interest pays a base rate — often small — plus a bonus rate on top, earned month by month, only in the months you meet the account's conditions. As Moneysmart's savings-accounts guide describes it, the conditions are things like making a minimum deposit each month, keeping the balance above a floor, or making no withdrawals; some accounts even restrict the bonus by age.

From the bank's side this is straightforward economics: the advertised number attracts you, and the conditions mean not everyone earns it every month. The regulator has looked at exactly this design — the ACCC's retail deposits inquiry examined how banks price savings accounts and how their terms and conditions work in practice.

None of this makes bonus accounts a trick to avoid. For a disciplined saver the bonus is real money, month after month. It makes them a game with rules — and games with rules reward the people who actually read them.

Miss a condition and nothing dramatic happens — no fee, no letter. The month simply pays the base rate, and that's the detail worth staring at: on many accounts the base is a fraction of the headline, so a missed month doesn't trim your interest, it mostly removes it. The advertised rate is the ceiling; the base rate is the floor you actually stand on when life happens.

And life is exactly what makes you miss. The month you withdraw is rarely a random month — it's the car repair, the vet, the flight home. Which means the account's worst-paying month and your hardest month tend to be the same month. If the account is also your emergency fund, a no-withdrawals condition has quietly put a price on reaching your own buffer.

The other expiring number is the honeymoon rate: a higher rate for a short introductory period. Moneysmart's advice is blunt — always check what the rate becomes after the honeymoon ends, because that lower ongoing number is the account you'll actually own. Banks count on the sign-up burst of attention never being repeated; your calendar is the counter-move.

Comparing savings accounts on the advertised rate alone is like comparing loans on the headline rate — it ranks the marketing, not the product. Moneysmart's comparison list is the antidote: check the base and bonus rates separately, the exact conditions, any honeymoon period and what follows it, fees, minimum balances, withdrawal rules, and whether the account demands a linked transaction account you don't otherwise want.

Then run the one test that matters: which conditions would the real you meet? Not the ideal you — the one with a variable pay date, a tendency to forget, and an occasional emergency. An account whose conditions match your actual behaviour at a slightly lower headline usually out-earns a stricter account you'll keep failing.

One quiet comfort while you compare: the money itself is safe either way. Deposits with Australian banks are protected by the government's Financial Claims Scheme up to a capped amount per person, per bank — Moneysmart covers the details. The risk in a savings account isn't losing the balance; it's earning the small print on it.

Once you've picked an account, take your memory out of the loop. Automate the qualifying deposit for payday — the same standing-transfer trick that builds a buffer also happens to satisfy the most common bonus condition, every month, without willpower. If the condition is "grow the balance", the automation does that too.

Solve the withdrawal clash with account design rather than discipline: one account for the untouchable savings earning its bonus, and a separate, condition-free home for the money you might need at short notice. That way an emergency costs you one month's bonus on nothing — the buffer account never had conditions to break.

And put two dates in your calendar: the honeymoon expiry, if you have one, and a yearly rate check. Savings rates move — lenders re-price, and the account that won last year can be mid-table now. The comparison you did once isn't a fact about the account; it was a fact about that month. Moneysmart's free savings goals calculator is handy when you re-run the numbers.