Dynamic currency conversion (DCC) is a payment option that lets a cardholder pay in their home or card-account currency when making a purchase or withdrawing cash in another currency. The merchant, ATM operator, or its payment provider converts the amount at the point of sale, rather than leaving the conversion to the card issuer or card network.
DCC is designed to show the cardholder the final amount in a familiar currency before confirming the transaction. However, the convenience can come at a cost: the exchange rate used by the merchant or ATM provider may include a markup or conversion margin that is less favourable than the rate that would otherwise be applied by the card issuer or card network.
How DCC works
DCC is most commonly offered when you use a card outside the country or currency area associated with your account.
A typical DCC flow looks like this:
- A payment is initiated in local currency
You pay at a foreign merchant, online checkout, hotel, restaurant, or ATM. The original transaction amount is in the local currency. - The terminal recognises an eligible foreign card
The payment terminal or ATM identifies that the card’s account currency differs from the local transaction currency. - You are offered a currency choice
The screen may ask whether you want to pay in the local currency or your home/account currency. For example:- Pay 100 EUR
- Or pay 110 USD
- A DCC rate is displayed
If DCC is available, the screen should show the local amount, converted amount, exchange rate, and any markup or fees included in the conversion. - You accept or decline
If you accept, the merchant or ATM operator performs the conversion and charges the card in the selected home/account currency. If you decline, the transaction remains in local currency and conversion is handled later by the card issuer or card network according to the card’s terms.
DCC can be offered at physical terminals, ATMs, and some online checkout flows.
Local currency vs home currency
When DCC appears, the choice is usually between paying in the local currency or your home/account currency.
| Option | Who converts the transaction? | What the user sees at checkout |
| Pay in local currency | The card issuer or card network converts the transaction later | The original local-currency amount |
| Pay in home/account currency with DCC | The merchant, acquirer, ATM operator, or DCC provider converts it immediately | A final amount in a familiar currency |
For example, if your card account is in USD and you are buying something in France:
- Local-currency option: You pay 100 EUR. Your card issuer or network later converts that amount into USD.
- DCC option: The merchant offers to charge, for example, 111 USD immediately using its own exchange rate.
Paying in your home currency may feel clearer because you know the exact amount at the point of purchase. But it does not necessarily mean the rate is better.
Why DCC can cost more
DCC often costs more because the exchange rate is set by the merchant-side provider, rather than by the card issuer or card network.
The DCC rate can include:
- An exchange-rate markup.
- A service margin paid to the DCC provider.
- Revenue sharing between the merchant, acquirer, ATM operator, or payment provider.
- Additional fees that may be embedded in the rate rather than shown as a separate line item.
As a result, a transaction can appear to have “no extra fee” while still using an unfavourable exchange rate. The difference between the reference market rate and the DCC rate is effectively a conversion cost.
DCC is also separate from any foreign transaction fee charged by the card issuer. A card may have no foreign transaction fee, but DCC can still apply if the cardholder chooses to pay in the home currency at the merchant’s or ATM operator’s rate.
DCC at card terminals
At a point-of-sale terminal, DCC may be offered in shops, restaurants, hotels, car-rental desks, tourist attractions, or other businesses that serve international visitors.
The terminal may display wording such as:
- “Pay in USD or EUR?”
- “Accept guaranteed exchange rate?”
- “Cardholder preferred currency.”
- “Conversion offered by the merchant.”
- “Continue with currency conversion?”
The local-currency option may be presented as “Decline conversion,” “Pay in local currency,” or simply the original local amount.
Users should read the screen carefully. In some cases, staff may select a currency option automatically or ask a vague question such as “Would you like to pay in dollars?” That question can refer to DCC rather than the underlying price of the purchase.
If you want your card issuer or card network to handle conversion, choose the local currency of the country where the purchase is being made.
DCC at ATMs
DCC can also be offered when withdrawing cash from a foreign ATM.
For example, an ATM in Spain may ask a cardholder with a USD account whether they want to:
- Withdraw 100 EUR and let their card provider convert the amount; or
- Be charged a stated USD amount through “guaranteed conversion.”
ATMs may use language such as:
- “Accept conversion?”
- “Continue with exchange rate?”
- “Conversion with markup.”
- “Proceed without conversion.”
If an ATM displays a “conversion markup” percentage, it is describing the additional margin included in the DCC rate. Users should distinguish this from the ATM’s separate withdrawal fee, which may apply regardless of the selected currency.
Declining DCC does not necessarily mean declining the withdrawal. It normally means continuing with the withdrawal in local currency.
DCC and crypto card products
Dynamic currency conversion can also affect crypto-card users when a card is used outside its base currency.
A crypto card programme may already involve one or more conversion steps:
- Crypto to fiat conversion for card settlement.
- Conversion between the card programme’s base currency and the merchant’s local currency.
- Possible foreign transaction fees or currency spreads.
If DCC is accepted at the merchant terminal or ATM, it can add another conversion layer controlled by the merchant-side provider. This can make pricing more difficult to understand and may lead to a less favourable final rate than allowing the card programme or card network to convert the local-currency transaction.
For clarity, product documentation can advise users to review the currency choice carefully and explain how foreign-currency transactions are priced under the card programme’s terms.
DCC vs foreign transaction fee
Dynamic currency conversion and foreign transaction fees are different charges.
| Feature | Dynamic currency conversion | Foreign transaction fee |
| Where it is applied | At the merchant terminal, ATM, or online checkout | By the card issuer or card programme |
| Who controls the exchange rate | Merchant-side DCC provider, acquirer, or ATM operator | Card issuer, card network, or programme provider |
| How it is shown | Embedded in the offered exchange rate or markup | Often shown as a separate statement fee or included in card terms |
| Currency choice | User chooses home/account currency instead of local currency | Transaction is usually processed in local currency first |
| Can both apply? | Yes, depending on the card and transaction structure | Yes, depending on the card and transaction structure |
A user should not assume that selecting DCC eliminates all other foreign-currency costs. The card’s own fees and pricing rules may still apply.
How to assess a DCC offer
Before accepting DCC, users can check:
- The original amount in local currency.
- The amount proposed in the home/account currency.
- The stated exchange rate.
- Any displayed markup or service fee.
- Whether the screen clearly offers a choice.
- The currency in which the merchant normally charges.
- The card’s own foreign-exchange terms and foreign transaction fees.
A practical approach is to compare the displayed DCC rate with a recent market reference rate or with the rate typically used by the card provider. Even a small percentage difference can be material on large purchases or repeated travel spending.
User guidance
For many cardholders, paying in the local currency is often the simpler way to avoid accepting a merchant-set conversion rate. The card issuer or card network will then perform the currency conversion under the card’s standard pricing rules.
However, the best choice can depend on the specific card, its foreign transaction fees, and the rate disclosed in the DCC offer. Users should compare the full cost rather than relying only on the familiarity of seeing an amount in their home currency.
When in doubt:
- Choose the local currency at the merchant terminal.
- Decline the ATM’s offered conversion, not the withdrawal itself.
- Review card statements to understand how foreign-currency transactions are converted.
- Contact the card provider if a currency choice was not clearly presented or a transaction appears to have been converted without consent.
