Multi-currency, FX, and DCC. 6 chapters and a final quiz.

Chapter 1. The three currencies of a cross-border payment.

As soon as a merchant sells outside its currency area, a single payment can involve up to three different currencies. The customer sees one, the card networks carry another, and a third lands in the merchant’s account. Multi-currency management comes down to knowing where they diverge, because every mismatch triggers a conversion, and every conversion has a cost, rarely disclosed in plain terms.

When all three currencies match (a French merchant selling in euros to a French customer), no conversion takes place. At the slightest mismatch, someone converts: the issuer, the scheme, the PSP, or a DCC provider. This course therefore answers one central question: who converts, at what rate, and who keeps the margin.

Chapter 2. Who converts, who takes a cut: the card FX chain.

Take the base case, without DCC: a French cardholder pays $100 on a US website. The transaction is authorized and cleared in dollars. Conversion to euros happens on the issuer side, in two layers: the network’s wholesale rate (Visa or Mastercard apply their daily rate), then the issuer markup, which French card statements label a “non-eurozone fee” (the equivalent of a US foreign transaction fee).

Two expert habits. First, check the network rate. Visa and Mastercard publish online currency converters that show the rate applied on a given date, with or without the issuer markup. Second, remember that the issuer markup is highly variable: around 2% to 3% at traditional French banks, and down to 0% (on weekdays and below a cap) at several neobanks, which have made it a selling point.

Chapter 3. DCC: paying in your own currency, at what price.

DCC (Dynamic Currency Conversion) reverses the logic of the previous chapter. Instead of letting the network and the issuer convert, the terminal, ATM, or merchant website offers the foreign cardholder the option to pay directly in their card’s currency. The “guaranteed” rate is set on the spot by a specialist provider tied to the acquirer. You find it wherever tourists go: hotels, ATMs, airport shops, airline websites.

DCC persists despite its reputation. It pays the distribution chain: the merchant or ATM operator earns a rebate on every acceptance. The promise of a “certain amount, known immediately” also appeals to some travelers. EU lawmakers set out to reduce this information asymmetry.

Chapter 4. Regulation (EU) 2019/518: mandatory transparency.

Faced with opaque DCC margins and FX fees, the European Union acted in stages. Regulation (EC) No 924/2009 had already required equal charges for domestic and cross-border euro payments. Regulation (EU) 2019/518 amended it to tackle currency conversion itself, before the whole framework was codified in Regulation (EU) 2021/1230, the reference text today.

The regulation provides a single benchmark: the reference rate the ECB publishes every business day. Expressed as “% over the ECB rate,” any conversion markup becomes comparable. A DCC offer at an ATM, an issuer’s fee, and an e-commerce site’s rate can then be read on the same scale. Before 2020, everyone displayed a “guaranteed rate” with no common reference, which made comparison virtually impossible for consumers.

• DCC provider (ATM, POS terminal): display the markup in % vs. the ECB rate and the amount in both currencies before confirmation; obtain the cardholder’s explicit choice
• Online merchant offering conversion: the same transparency obligations before payment confirmation
• Card issuer: publish its conversion charges in % vs. the ECB rate in an understandable way, and notify the cardholder electronically after a payment in an EU currency
• Everyone: never force the conversion, because the choice of currency belongs to the cardholder

Chapter 5. Settling in the currency you sell in: like-for-like and multi-currency accounts.

With like-for-like settlement, the PSP pays out in the transaction currency itself. Dollar sales arrive in dollars, pound sales in pounds, into multi-currency accounts. The conversion forced by the PSP disappears, and its 0.5% to 2% margin per sale with it. You convert only what needs converting, when you decide, on terms negotiated with your bank or an FX broker.

{
  "paymentId": "pay_20260711_84213",
  "presentment": { "amount": 119.00, "currency": "USD" },
  "authorization": { "amount": 119.00, "currency": "USD", "scheme": "visa" },
  "settlement": {
    "amount": 101.02,
    "currency": "EUR",
    "fxRate": 0.8489,
    "fxMarkupBps": 75,
    "likeForLike": false
  }
}

Here the fxMarkupBps field reveals a 75-basis-point (0.75%) markup taken on the USD→EUR conversion. Flip likeForLike to true and the $119 would land as is in the merchant’s dollar account. Demanding this level of detail in settlement reports is a PSP selection criterion in its own right.

Local acquiring takes like-for-like a step further. Acquiring the transaction in the card’s country moves it back into the domestic category, with capped interchange in Europe and no cross-border fees. On top of that come higher authorization rates, since issuers are statistically more inclined to approve domestic traffic. Large international PSPs make this a core pitch in their 2026 offerings.

Chapter 6. Hedging FX risk and setting international prices.

Collecting in foreign currencies without forced conversion is not enough: the FX risk stays on the books. There are three kinds of exposure. Transaction exposure runs between the sale and the actual conversion, while the rate moves. Translation exposure makes consolidated financial statements fluctuate with closing rates. Economic exposure weighs on price competitiveness against foreign rivals and is tied to exchange rates over the long run.

A proper hedging policy fits on one page. It lists the exposures covered (by currency and time horizon) and the hedge ratio, for example 70% of forecast flows at 6 months and 40% at 12 months. It names the authorized instruments, the counterparties, and the governance for exceptions. This document protects as much against FX risk as against the temptation to “play” the market.

Here international pricing meets treasury. A local price list with psychological price points ($11.99, DKK 79, ¥1,490) converts better than an amount with decimals derived from a spot rate. The repricing corridor turns FX from a daily hazard into a documented quarterly decision. The leading global SaaS and e-commerce companies all work this way.