Dynamic currency conversion
What is dynamic currency conversion?
Dynamic currency conversion (DCC) is a service that lets a pay a foreign-currency amount in their own home currency, with the conversion applied at the moment of payment instead of later by their . The cardholder sees the converted total and the rate before approving, and chooses which currency to be billed in.
The rate comes from the DCC provider rather than the or the issuer, and it carries a markup over the wholesale . That markup is split between the DCC provider, the , and the merchant, which is what makes the service commercially attractive to offer. The merchant still prices and settles in its own currency.
Key facts
- Also known as: cardholder preferred currency (CPC)
- Applies to: cross-border card payments at terminals, ATMs, and online checkouts
- Who sets the rate: the DCC provider, using a wholesale foreign exchange rate plus a markup
- Who decides: the cardholder, who must be shown both currencies and can decline DCC
- Revenue split: the merchant and the acquiring bank each receive a share of the markup
How it works
- Currency detection. The terminal or checkout page reads the card BIN to identify the currency the card is billed in. If that differs from the transaction currency, DCC becomes available.
- Rate quote. The DCC provider returns a converted amount based on its own foreign exchange rate plus a markup.
- Cardholder choice. Both totals appear side by side, along with the rate applied. The cardholder selects one, and neither option is pre-selected.
- Authorization. If DCC is accepted, the transaction is in the cardholder's currency for the exact amount displayed, flagged as a DCC transaction.
- Settlement. The merchant is in its normal currency. The issuer bills the cardholder the displayed amount without applying its own conversion.
Why it matters
- The statement amount matches the amount the cardholder approved at checkout, rather than a figure the issuer calculates at its own rate days later.
- A charge the cardholder can read in a familiar currency removes the "I don't recognise this amount" trigger behind a share of cross-border filings.
- Merchants and acquiring banks earn a share of the conversion markup on transactions that would otherwise generate no foreign exchange revenue.
- Because the DCC rate is quoted and locked at authorization, the merchant's , reconciliation, and settlement records all reference one agreed amount.
Common issues
- Silent opt-in. Terminals and checkouts that pre-select the home currency, or convert without displaying both options, breach card network DCC rules and generate complaints. Network rules require an unbiased choice presented to the cardholder.
- Markup opacity. The gap between the DCC rate and the interbank rate is rarely as visible as the rate itself, so cardholders accept pricing they'd refuse if the markup were shown alongside it.
- Refund timing. A refund processed days after the purchase converts at the rate in force on the refund date, so the cardholder can receive back less than they paid.
- Double conversion. If the card is billed in a third currency, neither the transaction currency nor the DCC currency, the issuer converts again on top of the DCC rate.
