Currency routing is a payment routing rule that sends each transaction to an acquirer, processor or payout provider based on its currency, so it is processed and settled where that currency is handled most cheaply. It matches the presentment currency the customer pays in to a provider that settles in the same currency, avoiding the FX margin a single-currency provider charges. For a merchant with £500,000 of monthly sterling sales, a 1.5% conversion markup costs £7,500 a month. It often doubles as local acquiring though cross-border fees follow issuer and acquirer locations, not currency. On payouts it routes EUR via SEPA and GBP via Faster Payments, while an EMI needs safeguarding accounts and daily reconciliation per currency.
What is currency routing
Two currencies are involved in every card payment: the presentment currency the customer pays in, and the settlement currency the merchant receives. When a provider cannot settle in the presentment currency, it converts, usually at its own rate plus a margin. Currency routing matches each presentment currency to a provider that settles in that same currency.
How does payment routing by currency work
Consider an Irish merchant selling in EUR, GBP, USD and PLN. Acquirer A settles only in EUR. Acquirer B settles in GBP and USD. A £200 order sent to A is converted into euros with a 1.5% markup on top of the mid-market rate, costing £3 before any processing fee. Routed to B, the same order settles as £200 into the merchant's sterling account, which then pays UK suppliers and UK advertising bills without converting back. On £500,000 of monthly sterling sales, that 1.5% is £7,500 a month.
The rule set is usually simple: currency X goes to provider Y, with a fallback that accepts conversion if Y is down.
Multi currency payment routing and local acquiring
Currency often correlates with where the card was issued, so multi currency payment routing frequently doubles as local acquiring: USD traffic goes to a US acquirer, GBP to a UK one. That can raise approval rates, because issuers approve domestic transactions more readily, and it removes scheme cross-border fees. The precision matters: cross-border fees follow the issuer and acquirer locations, not the currency. A Polish card paying in euros through a Lithuanian acquirer is still a cross-border transaction.
Currency routing vs DCC and multi-currency pricing
Dynamic currency conversion lets the cardholder pay in their home currency at the terminal or checkout, with the conversion margin earned by the merchant's provider. Multi-currency pricing shows prices in the shopper's currency from the start. Both decide which currency the customer pays in. Currency routing then decides where that payment is processed, and whether a foreign exchange conversion happens at all.
Currency routing on payouts
The same logic runs outbound. A platform paying sellers routes EUR via SEPA, GBP via Faster Payments and other currencies via local rails or a correspondent network, as in a multi-currency payout. For an EMI, the payoff depends on treasury: holding safeguarded balances in each currency avoids converting client funds twice, but requires safeguarding accounts and daily reconciliation per currency.