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Check three things before comparing the price
A$20 and US$20 are different prices. There is another distinction that is easier to miss: a purchase charged in Australian dollars can still be treated as an international transaction by your card provider.
| Check | Where to look | What it answers |
|---|---|---|
| Display currency | Currency selector and plan listing | Is this amount AUD, USD or another currency? |
| Payment currency | Final order summary and payment confirmation | Which currency is being charged for this purchase? |
| Card fees | Your own card’s current terms | Does the provider charge for foreign currency or overseas processing, and does an exemption apply? |
Do these checks for the exact purchase. A company’s Australian website, Australian-dollar display or local company name does not establish every payment method’s processing location.
Why an AUD purchase can still have a fee
ASIC’s Moneysmart explains that an international transaction fee can apply to purchases involving overseas merchants or payment processing, even when the transaction is in Australian dollars.
CommBank’s credit card conditions give a concrete example: an AUD purchase made online from Australia can attract an international transaction fee when the merchant or processing entity is overseas. Whether a fee applies also depends on the card product. NAB similarly distinguishes international purchases in AUD from international purchases in another currency.
That is why currency conversion and international transaction fees should be separate lines in your comparison. Your own card’s terms decide the fee; another traveller’s experience with a different card may not match yours.
A worked comparison using assumed prices
Suppose two plans both cover your destination for the full trip and have suitable data and hotspot terms. Plan A is priced at A$30. Plan B is priced at US$18. For this example only, assume the card converts US$1 to A$1.55 and charges a 3% international transaction fee on Plan B.
| Step | Calculation | Amount |
|---|---|---|
| Convert Plan B | US$18 × A$1.55 per US$1 | A$27.90 |
| Assumed card fee | A$27.90 × 3% | A$0.84, rounded |
| Plan B total | A$27.90 + A$0.84 | A$28.74 |
| Difference from Plan A | A$30.00 − A$28.74 | A$1.26 before any fee on Plan A |
If the card also charged 3% on the A$30 purchase because it was processed overseas, Plan A would cost A$30.90. If your card charged neither transaction a fee, the two totals would instead be A$30 and A$27.90 at the assumed rate. Neither AUD nor USD wins automatically.
Replace every input with the current checkout amount and your actual payment terms. These numbers show the method; they are not a quote for a card, exchange rate or eSIM.
A local price list is not necessarily a currency conversion
A retailer may set a separate Australian-dollar price rather than convert its US-dollar price at a live rate. You cannot determine the final Australian price simply by multiplying a US listing by today’s exchange rate.
Open the provider’s currency selector before comparing plans, then confirm the currency at checkout. If it offers a choice of payment currency, compare the actual offered amount and your card’s conversion terms. NAB notes that a merchant’s conversion rate can differ from the card scheme’s rate.
Our dated travel eSIM price comparison keeps captured currencies visible. Also compare coverage, validity and the exact meaning of an unlimited allowance. A small price difference is secondary if one plan excludes a stop or cannot support the sharing you need.
What to check on a statement
- Keep the final checkout confirmation or receipt showing the amount and currency.
- Open the completed transaction in your banking app or statement and look for original-currency details and separately itemised fees.
- If the currency or fee is unclear, ask the card issuer which rule was applied and what transaction currency it received. Give it the transaction reference through its secure channel.
The presence or absence of an international transaction fee is not a reliable currency detector. An AUD transaction can attract a fee, and a card with an exemption can process a foreign-currency transaction without that fee.
What The SIM Shop shows
Our store prices are in Australian dollars. Read the checkout total for the amount we charge and check your payment provider separately for any charges it may apply. You can choose your destination and compare the selected offer’s data, validity and coverage before paying.
Sale prices need the same checks. Our travel eSIM deal checklist explains how to compare the actual price and the plan you’ll receive.
Questions about AUD eSIM prices
Does paying in AUD avoid every international transaction fee?
No. The fee can depend on where the merchant or payment processor is based as well as the currency and your card product. Check your card’s own conditions.
Does a foreign transaction fee prove I was charged in USD?
No. Check the original transaction currency on your receipt and statement, or ask your card issuer. The fee alone cannot establish it.
Should I compare the lowest number on each provider’s page?
First match the currencies, destination coverage, data amount and validity. Then account for your payment costs. A smaller number in another currency is not yet a comparable total.
Sources and checks
Currency and fee guidance checked 3 October 2026. The arithmetic is an illustrative calculation. We have not made test purchases with competing providers or measured their card settlement. An international transaction fee alone doesn’t establish the transaction currency.
