What DCC actually does
Dynamic Currency Conversion can offer an eligible cardholder the option to complete a transaction in their billing currency instead of the merchant’s local currency. If the customer declines, the transaction proceeds in local currency and the card issuer may perform any later conversion.
The service must be enabled and managed through an acquirer or DCC provider. It is not a currency switch a merchant should build independently.
The choice must be informed
Visa and Mastercard rules require clear disclosure around the currency options. Mastercard’s merchant guidance states that the cardholder should see the local and billing-currency amounts, the conversion rate and any applicable fee, and must not be required or encouraged to select DCC.
A clean customer experience
- Show local currency and the offered billing currency clearly.
- Display the exchange rate and any applicable markup or fee before selection.
- Use neutral language and visual treatment for both choices.
- Record and honour the cardholder’s choice.
- Give a receipt containing the required currency information.
- Confirm the correct refund process with the provider.
Assess the business case without invented averages
DCC availability, commercial share and customer uptake vary by provider, location, card and merchant agreement. Ask for the complete written economics, operating rules and reporting. Model them against your real international-card mix instead of relying on a generic revenue example.
Questions before enabling DCC
| Area | Question |
|---|---|
| Eligibility | Which cards, currencies, channels and locations are covered? |
| Disclosure | Exactly what will the terminal or checkout show before selection? |
| Commercials | What margin or revenue share applies and what other fees change? |
| Operations | How are receipts, reversals and refunds handled? |
| Monitoring | How are complaints, opt-in and compliance issues reported? |
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About this guide
Published by Card Payment Connect, an independent card-payment consultancy for UK businesses. Reviewed by Matthew McCarthy, who has worked in UK merchant services for over a decade. Last reviewed 11 September 2026.