Paying with a credit card in Argentina seems simple, but the real cost of each transaction only appears weeks later, when the billing cycle closes.

Between the tax on international operations (IOF), the issuer's exchange spread, and the potential dynamic currency conversion, the final amount can be quite different from what the price in pesos suggested.

Understanding each of these layers before traveling is what allows you to make more informed decisions about how to pay during your trip.

In this article, you will understand how the IOF works on international purchases, what dynamic conversion is, and how to have more control over your expenses.

For those who want to start organizing their payments in advance, the belo  app allows you to track on your cell phone the available options for paying and moving your balance during the trip.

The invisible cost of every purchase

The IOF (Tax on Financial Operations) is levied on transactions in foreign currency made with Brazilian payment methods. The rate varies according to the type of operation and can be altered by government decision.

Before traveling, check with your financial institution which rate is in effect and how it will be applied to your transactions.

In addition to the IOF, the payment method issuer usually applies a spread over the benchmark rate at the time of conversion. This spread varies according to the institution and rarely appears prominently on the bill.
The final price of the purchase in Brazilian reais depends on the combination of the applied exchange rate, the issuer's spread, and the applicable taxes.

The timing of the conversion also matters.

In traditional payment methods, the exchange rate is applied on the processing or statement closing date, not necessarily on the date of purchase.

If the Brazilian real fluctuates during this interval, the final amount may be higher or lower than expected.

How dynamic currency conversion (DCC) works

Dynamic currency conversion appears when the payment terminal offers the option to charge in Brazilian reais instead of pesos.

It seems convenient, but the exchange rate applied by the merchant is usually less favorable than that of your issuer, and you still pay taxes on the converted amount.

The practical recommendation is to always pay in Argentine pesos and leave the conversion to your payment method. Decline the option to "pay in reais" whenever it appears on the terminal.

How each method affects the final cost

Method · Taxes involved · When the amount appears · What to review

Traditional bank payment methods · IOF according to type of operation + issuer's spread · When the statement closes, weeks later · Effective rate, applied exchange, issuer's spread

Cash purchase in Brazil · IOF for cash exchange (check current rate) · At the time of exchange · Exchange house spread, applicable taxes

Digital payment via QR with visible rate · Depends on platform conditions · Before confirming the transaction · If the rate is displayed before confirmation

Dynamic conversion (DCC) · Merchant's spread + taxes on the converted amount · At the time of payment, but with an unfavorable exchange rate · Always decline, pay in Argentine pesos

How to have more control over expenses

The difference between the types of operations lies in the applicable IOF rates. Purchasing cash, payments with certain methods, and overseas withdrawals can have different rates. Check the current conditions with your financial institution before traveling.

In the belo app, you can track on the app the options to pay and convert your balance during the trip, with the values and exchange rate displayed on the screen before confirming any transaction.
To understand how payments work, consult the  payment guide. Keep the receipts for each transaction.

What to check on the bill

 When the statement arrives, each transaction made in Argentina should show the original amount in foreign currency, the exchange rate used, and the taxes charged.

If any information is bundled into the total without breakdown, contact the issuing institution for clarification.

Enabling transaction notifications on your issuer's app helps identify discrepancies in real time, before the billing cycle closes.

If you want to track your payment options with more control during your trip, it is worth setting up the belo app in advance. And if you are still organizing your lodging, belo Travel can also help you find discounted options.

Frequently asked questions about credit card IOF in Argentina

Why is paying in reais on the terminal more expensive? 

The dynamic conversion made by the merchant usually uses a less favorable exchange rate than that of your issuer. Always pay in Argentine pesos.

How to check if taxes were charged correctly? 

Check current conditions with your institution and compare the amount charged with what was informed. For specific questions about your transactions in belo, consult the help center.

When should I use traditional bank payment methods in Argentina? 

Reserve them for situations where other methods are not available. For daily expenses, methods that display the exchange rate before confirming offer more control.

How to track expenses in real-time? 

Activate transaction notifications on your issuer's app. In belo, each operation is recorded in the app's history with the values displayed before confirmation.