I use a debit card as well. I'm not sure whether you track your expenses at all but that's what ANZ states on their website:
Overseas transaction fee
(see note 6)
ANZ will charge 3% of the value of any
International Transaction charged or credited to
your ANZ account
It may not always be clear to you when use of
your ANZ account is an International Transaction,
for example where the merchant or financial
institution processing a charge or credit is located
outside of Australia.
For the purpose of the Overseas Transaction
Fee, an International Transaction is any purchase
(including a purchase of items directly convertible
to Australian currency cash), cash withdrawal or
credit (including a refund or reversal in respect of a
purchase) processed to your ANZ account:
• In a currency other than Australian currency; or
• Where the merchant or financial institution
accepting or processing the transaction, credit,
refund or reversal is outside of Australia; or
• Which is considered by Visa to require conversion
into Australian currency (for example, where the
transaction, credit, refund or reversal is submitted
on behalf of a merchant to a financial institution
by an intermediary that is outside of Australia).
When choosing an Australian bank for international transactions, it’s important to consider transfer fees, exchange rates, and processing speed. Many banks like Westpac or BankSA offer global transfers with competitive conditions, often completing payments within 1–3 business days. However, hidden currency conversion fees can still apply, so comparing options is essential. Interestingly, while researching financial services, I also came across casino platforms such as
https://jeetcityonlinecasino.com/login/ which shows how global payments are widely used in entertainment industries too. Overall, selecting the right bank depends on transparency, reliability, and international accessibility.
Also, that's what they privately told me:
"Yes we do have 3% transaction fee when you use your card overseas or with overseas merchant. Please refer to the following website for fees involved -
https://www.anz.com.au/content/dam/anzcomau/documents/pdf/personal-account-fees-charges.pdf.