The mid-market rate — also called the interbank rate or the “real” exchange rate — is the midpoint between the buying and selling prices of two currencies on global currency markets. It’s the rate you see on Google, XE.com or Reuters. Banks and exchange services add a margin on top of this rate, which is how they make money on currency conversions. The mid-market rate is the fairest benchmark to use when trading cash with a friend.

Almost every bank and currency exchange service adds a margin — called a spread — on top of the mid-market rate. This is how they profit from currency conversions. Most Australian banks charge between 2.5% and 3.5% on overseas purchases. Airport currency kiosks typically charge 8–12%. This cost is often hidden inside the exchange rate itself rather than shown as a separate fee, which is why it’s easy to miss.

A foreign transaction fee is a charge added by your bank every time you make a purchase in a foreign currency or from an overseas merchant. Most Australian bank debit cards charge 2.5–3.5% per transaction. Some cards — including the CommBank World Debit Mastercard, NAB Platinum Visa Debit and UBank Spend — charge no foreign transaction fees at all.

On a typical two-week overseas trip spending $150 AUD per day, a 3% foreign transaction fee costs around $63 in fees alone — before any ATM charges. If you also withdraw cash at ATMs twice a week at $5 per withdrawal, that’s another $20. Most travellers lose $80–150 per trip to avoidable bank fees without realising it.

One of you has leftover foreign cash. The other needs it (or wants to buy it to take on a trip). Instead of both of you going to a bank or airport kiosk and paying 8–12% in fees each, you trade directly at the mid-market rate. One person pays AUD via Osko or Beem, the other hands over the cash. Everyone saves the bank margin — typically $10–30 per $200 exchanged.

The tool currently supports AUD, USD, EUR, GBP, SGD, JPY, NZD, THB, IDR and CAD — covering the most common destinations for Australian travellers. Rates are sourced live from ExchangeRate-API and updated daily.

Use Osko or Beem — both are instant bank transfers available through almost every Australian banking app. Copy the message the tool generates and paste it into WhatsApp, iMessage or Messenger so there’s a clear record of the agreed rate. Then transfer the AUD amount via your banking app. Most transfers arrive within 60 seconds.

Yes — rates are fetched live from ExchangeRate-API each time the tool loads. The publication timestamp is shown in the tool so you can see exactly when the rate was last updated. For high-value exchanges, always confirm the rate immediately before transferring.

Three Australian bank debit cards charge no foreign transaction fees on purchases: the CommBank World Debit Mastercard (also includes DragonPass lounge access and travel insurance), the NAB Platinum Visa Debit (no purchase fees, but $5 + 3.5% on ATM withdrawals), and the UBank Spend (no fees on purchases or ATMs — the simplest option).

Press credit. This routes the transaction through the Mastercard or Visa network, which gives you the mid-market rate and avoids the local bank’s debit network fees. With a CommBank World Debit Mastercard in particular, pressing debit at some overseas ATMs results in rejected transactions — pressing credit resolves this. Always decline dynamic currency conversion (DCC) if offered — choose to pay in the local currency, not AUD.

Dynamic currency conversion (DCC) is when an overseas ATM or merchant offers to convert your transaction into Australian dollars on the spot. It sounds convenient but always comes with a poor exchange rate — typically 3–6% worse than letting your own bank convert at the Mastercard or Visa rate. Always choose to pay in the local currency and let your card handle the conversion.