What Is a Foreign Currency Conversion Fee? How It Differs from Foreign Transaction Fees on VND Payments

When using a card to make payments or withdraw cash abroad, you may notice an additional charge known as a foreign currency conversion fee. This fee is associated with most international card transactions, but not everyone fully understands how it is calculated or what the common rates are today. This article will help you understand the nature of this fee, distinguish it from related charges, and identify criteria for choosing a card that suits your international spending needs.

1. What Is a Foreign Currency Conversion Fee?

A foreign currency conversion fee is a charge that may apply when a cardholder makes a transaction in a foreign currency while the card's settlement or billing currency is different. In this case, the transaction amount is converted into the card's billing currency using the exchange rate applicable to the transaction, and an additional fee may be charged according to the fee schedule of the card-issuing bank.

For example: When using a card with VND as its billing currency to pay for a transaction in JPY in Japan, the transaction amount will be converted into VND for settlement. In addition to the amount converted at the applicable exchange rate, the transaction may incur a fee under the card-issuing bank's policies.

This fee is typically calculated based on:

• The transaction amount converted into VND.
• The percentage-based fee set by the international card network (such as Visa or Mastercard) and the card-issuing bank.
• The exchange rate at the time the transaction is processed, which may differ from the rate you see when making a purchase.

As exchange rates and fee schedules may vary between banks, checking the applicable fees and exchange rates before using your card for international transactions will help you manage your expenses more effectively.

2. Differences Between Foreign Currency Conversion Fees and Foreign Transaction Fees on VND Payments

Many people often confuse these two types of fees because both may apply when paying for purchases at international stores, apps, or services. The key difference lies in the currency you choose to pay in when swiping your card or placing an order.

2.1. Foreign Currency Conversion Fee

• Nature: Applies when you pay directly in a foreign currency (USD, JPY, EUR, etc.). The bank converts that foreign currency amount into VND to debit your card account.
• Charged by: The international card network (Visa, Mastercard, etc.) in coordination with the card-issuing bank.
• Common fee range: Approximately 1%–4% of the converted transaction value (*).
• Example: When traveling to Japan, you use your card to pay for a meal in Japanese yen (JPY). Your card is charged the exact amount in JPY. When your statement is issued, the bank converts the JPY amount into VND and charges an additional foreign currency conversion fee.

2.2. Foreign Transaction Fee on VND Payments

• Nature: Applies when you choose to pay in VND, but the merchant or payment processor is located overseas. Although no currency conversion is required, the international payment system still charges a fee for cross-border transactions.
• Charged by: The card-issuing bank for domestic-currency transactions processed overseas.
• Common fee range: Approximately 1%–1.5% of the transaction value (or subject to a minimum fee, such as 9,000 VND per transaction, depending on the bank) (*).
• Example: When booking a hotel through Trip.com, you choose to pay in VND. The displayed amount is in VND, but when your statement is issued, the bank will charge an additional foreign transaction processing fee on the VND payment.

(*) The fees stated above are for general market reference only and may change over time depending on each bank's policies. You should check the bank's official fee schedule for accurate and up-to-date information.

3. Current Foreign Currency Conversion Fee Rates

Foreign currency conversion fees currently range from approximately 1%–4% of the converted transaction value (*). In addition, many banks apply a minimum fee per transaction, commonly starting at around 10,000 VND. This minimum fee applies when the transaction value is small and the percentage-based fee is lower than the specified minimum.

Illustrative Examples:

• Case 1 (High-Value Transaction - % Fee):
  You use your card to purchase a handbag in Singapore for 500 SGD (equivalent to approximately 9,500,000 VND). The bank's foreign currency conversion fee is 2.5%.
  
  Fee payable: 9,500,000 VND × 2.5% = 237,500 VND (as 237,500 VND exceeds the minimum fee of 10,000 VND).
• Case 2 (Low-Value Transaction – Minimum Fee Applies):
  You pay 2 USD (equivalent to approximately 50,000 VND) for a cup of coffee in the US. The percentage-based foreign currency conversion fee is 50,000 VND × 2.5% = 1,250 VND.
  
  Since 1,250 VND is lower than the bank's minimum fee of 10,000 VND, the foreign currency conversion fee payable for this transaction is 10,000 VND.

Some factors that affect the fee you pay include:

• Card tier and type: Premium cards (Platinum/Signature/Ultimate, etc.) often offer more favorable foreign currency conversion fees than standard cards (Classic/Standard).
• International card network: Visa, Mastercard, JCB, American Express, and others have different conversion policies and fee structures.
• Individual bank policies and promotions: These may vary depending on promotional campaigns or product packages offered during different periods.

(*) The fees mentioned are for general market reference, updated as of September 4, 2026, and may change over time depending on each bank's policies. You should check with the bank for the latest official information.

4. Criteria for Choosing a Card for Foreign Currency Payments

Exchange Rate Applied to Transactions

In addition to fees, the exchange rate applied when converting a transaction also affects the total amount you actually pay. Therefore, when comparing cards, you should consider not only the fee rate but also the exchange rate and any accompanying benefits.

Illustrative Example:

You pay a bill of 1,000 USD while traveling abroad and compare two banks:

• Bank A: Offers a very low foreign currency conversion fee of 1.5%, but the USD selling rate applied at the time of settlement is relatively high at 25,500 VND per 1 USD.
  • Converted amount: 1,000 × 25,500 VND = 25,500,000 VND.
  • Conversion fee (1.5%): 25,500,000 VND × 1.5% = 382,500 VND.
• Total amount payable at Bank A: 25,500,000 VND + 382,500 VND = 25,882,500 VND.
• Bank B: Charges a higher foreign currency conversion fee of 2%, but offers a better exchange rate of 25,000 VND/1 USD, along with a 1% cashback program on all overseas spending transactions.
  • Converted amount: 1,000 × 25,000 VND = 25,000,000 VND.
  • Conversion fee (2%): 25,000,000 VND × 2% = 500,000 VND.
  • Cashback (1%): 25,000,000 VND × 1% = 250,000 VND.
  • Total amount payable at Bank B: 25,000,000 VND + 500,000 VND - 250,000 VND = 25,250,000 VND.

Conclusion: Although Bank A has a lower listed percentage-based fee, Bank B's better exchange rate and cashback benefit mean that using its card helps you save 632,500 VND on the same 1,000 USD transaction.

International Transaction Fees: You can prioritize cards with low foreign currency conversion fees or consider cards that offer cashback, reward points, or airline miles to offset the additional costs.

Prepare a Backup Payment Method: When traveling abroad, you may want to carry an additional payment method, such as another card or cash, to ensure you can make payments if your primary method encounters an issue.

5. Frequently Asked Questions (FAQ)

1. How is the foreign currency conversion fee calculated? This fee is typically calculated as a certain percentage of the transaction value converted into VND at the exchange rate applicable when the transaction is processed.

2. Which transactions incur a foreign currency conversion fee? Payments, purchases, or cash withdrawals made in a currency different from the card's billing currency typically incur this fee.

3. How can I reduce foreign currency conversion fees when spending internationally? You can review and compare the fee schedules of different cards and consider choosing one with fee policies that suit the frequency and value of your international transactions.

4. Are foreign currency conversion fees fixed? Fees may change over time depending on each bank's policies. Therefore, you should check the bank's official information before making a transaction.

Foreign currency conversion fees are charges incurred when using a card to make payments abroad or shop internationally. Understanding how these fees are calculated, distinguishing them from related charges, and choosing a suitable card can help you optimize costs and better manage your international spending plans. Review the fee schedule and accompanying benefits carefully before deciding to apply for a card to enjoy a more convenient and cost-effective international spending experience.