Local-currency pricing is one of the fastest conversion wins in cross-border e-commerce: according to ESW's Global Voices 2025 survey, 59% of shoppers abandon a checkout that doesn't support their local currency or preferred payment type. A quarter later, though, the margin on the new market comes in below the business case, and no line on the provider invoice explains why.That gap is where multi-currency payments get expensive. Most teams treat FX as a treasury line, but the cost is set much earlier, at checkout, in routing and in settlement, usually by defaults nobody chose.I call this inherited FX. In this article, I'll show where it hides across three decisions (who converts, where you acquire, what you settle into), how to measure it per currency pair, and when local acquiring pays back.Who converts currencies in multi-currency payments: 3 models comparedShowing a price in złoty or Brazilian real answers the shopper's question. Yours stays open: somewhere between that price and your bank account, the money changes currency, and whoever converts it sets the rate.Issuer-side conversion. You charge in your own currency, and the shopper's bank converts. The cost and the uncertainty land on the shopper, which is exactly what local pricing exists to remove.Conversion at checkout. Local pricing or dynamic currency conversion (DCC) puts the rate, and the margin within it, on your side of the transaction. Regulators treat that margin as a charge: under the EU's Cross-Border Payments Regulation, card conversion charges must be expressed as a mark-up over the ECB reference rate.Conversion at settlement. The most common and the least visible model, because the spread shows up as a slightly worse rate on a settlement report rather than as a fee.Most merchants run all three at once. That is inherited FX in its purest form.5 hidden FX fees in multi-currency payments and where to find themThe FSB's 2025 progress report found that FX remains the largest component of retail cross-border payment costs. For a merchant, that cost rarely arrives as a fee. It hides in five places, and each one follows from one of the three decisions above.1. The spread inside the settlement rateWhen a provider converts at settlement, its margin is built into the rate. A spread of under a percentage point disappears on a single order and becomes a real number across a year of volume in that currency. For scale, the FSB's survey of payment providers found average FX margins of 0.7–1.1% on cross-border payments where the receiving provider handles conversion. You can only know your own figure by comparing the applied rate with a neutral reference, which most settlement reports don't provide.2. The cross-border acquiring premiumWhen the card's issuing country differs from the acquirer's, schemes treat the transaction as cross-border, and interchange and scheme fees rise. The UK-EEA corridor shows how wide that gap can get, and how slowly it closes. Card-not-present interchange on consumer cards in that corridor still sits at 1.15% for debit and 1.5% for credit, up from 0.2% and 0.3% before Brexit, and the Payment Systems Regulator estimates the difference costs UK businesses £150–200 million a year. In January 2026, the High Court confirmed the regulator's power to cap these fees, but the cap's level and timing remain open.Fees are only half of the premium. Issuers score foreign-acquired card-not-present transactions as riskier, so they decline cross-border payments more often than domestic ones. That lost revenue lands in the approval rate report, not the FX report, but it stems from the same acquiring decision.3. Double conversionMismatched currencies stack spreads. A shopper with a euro card is shown prices in złoty because of geolocation: their bank converts the złoty charge into euros, your provider converts the złoty into dollars at settlement, and two margins are taken on one sale. The same thing happens one step later when you settle into a currency you don't spend, so treasury converts a third time to pay suppliers. Each step looks reasonable on its own, but the total rarely does.4. Rate movement between sale, settlement, and refundThe rate at authorization and the rate at settlement are rarely the same, and someone absorbs the difference. Refunds widen the exposure: an order refunded three weeks later is converted at a new rate, often with the spread charged again in the opposite direction. On a refunded sale, you can pay the margin twice and still carry the movement in between. Chargebacks follow the same logic, with the dispute fee on top. For categories with high refund rates, such as apparel or travel, this becomes a material cost with no line of its own.5. Reconciliation across currenciesProviders report settlement differently. Some net fees before conversion and some after; some batch by currency, others by day. When finance cannot tie a settled amount back to the original transaction and the rate applied to it, the four costs above can't be measured, which is exactly why they persist. The reconciliation work itself is a cost too, paid in finance team hours at every month-end close.How to calculate your effective FX costMeasuring what multi-currency payments actually cost takes a quarter of data and no treasury team. The inputs already sit in your settlement reports.Pull settled transactions for each currency pair, with authorization date, settlement date, original amount, and settled amount.Compare the applied rate with a neutral reference for the settlement date, such as the ECB reference rate for euro pairs. The difference in basis points is your effective spread per pair.Add cross-border interchange and scheme fees for the same transactions, then the approval gap between domestic and cross-border cards, multiplied by average order value.Run the same calculation on refunds and chargebacks alone. If the effective cost there sits well above the sales figure, your refund flow is converting twice.Rank markets by total effective cost as a share of revenue. That ranking, not volume alone, shows where a change in setup pays back first.Multi-currency payment gateway checklist: controls that cut FX costsThe calculation only helps if your setup lets you act on it. Whether you are evaluating a new multi-currency payment gateway or auditing the one you run, check for five controls:Presentment, processing, and settlement currency set independently per market, so local pricing doesn't force a conversion you never chose.Rate source and margin visible per currency pair, so the effective rate is a setting rather than something reverse-engineered from statements.Routing by card country and currency, so markets with enough volume go to a local acquirer and qualify as domestic.Balances held in several currencies, so revenue in one currency pays refunds, suppliers, or payouts in that currency without a round trip through your base currency.Transaction-level reporting of the applied rate, normalized across providers, so reconciliation stops being the bottleneck.This is the layer where payment orchestration earns its place. In Corefy, for example, exchange rate schemes define the rate source plus a percentage and fixed fee for each currency pair, so the rate applied to a conversion is configured and visible in one place, not scattered across provider contracts. Combined with payment routing rules that use currency and card issuer country as conditions, the three decisions from the start of this article become settings a payment team owns.When to settle in local currency and when cross-border is cheaperLocal is not automatically cheaper. Local acquiring usually needs a local entity or a partner that has one, enough volume to earn competitive pricing, and another settlement stream to reconcile. Holding balances in many currencies ties up liquidity and adds currency risk. For a market producing a few hundred orders a month, a well-priced cross-border setup with transparent conversion often beats the overhead.The threshold is arithmetic. Compare the annual effective cost for a market, from the calculation above, with the cost of running it locally. Once cross-border fees, spread, and lost approvals exceed that figure, moving local pays back. Below it, the better moves are to renegotiate the spread and fix currency mismatches.Key takeawaysCross-border payments will stay more expensive than domestic ones for some time. What a merchant controls is whether it chooses that cost or inherits it. Local-currency pricing wins the shopper, but multi-currency payments protect the margin only when someone decides who converts, where you acquire, and what you settle into. Start with the effective-cost calculation for your three largest currency pairs: it turns a vague FX problem into a short list of fixes.Yes#CrossBorderPaymentsAlexandra PotapskaHead of Customer SuccessCorefy13 Nov, 2026