Double Currency Conversion

Double currency conversion occurs when funds sent across borders are converted from the sender's currency into an intermediate currency, most often the US dollar, and then converted a second time into the beneficiary's currency. Each conversion can carry its own FX spread and fees, and because different institutions perform them, the sender usually does not know in advance how much the beneficiary will receive.

The practice is common in cross-border payments between two currencies that are not traded directly against each other, and it also occurs in card payments when a merchant or terminal offers to convert the price before the card issuer converts it again.

• Market structure. Most currencies trade most heavily against the US dollar. A currency pair such as GBP/KES or AED/PKR may have little direct liquidity, so banks price and execute it through two dollar legs.
• Correspondent chains. A bank without a nostro account in the destination currency may send dollars through a correspondent bank or intermediary bank, leaving the beneficiary's bank to convert on arrival.
• Customer instructions. A sender may choose to pay in dollars because the beneficiary invoiced in dollars, even though the beneficiary's account is in local currency.
• Card payments. With dynamic currency conversion (DCC), a foreign merchant converts the price into the cardholder's currency; if the card is denominated in a third currency, another conversion follows.

A UK company pays an Indian supplier £1,000. Assume mid-market rates of 1.27 dollars per pound and 83.00 rupees per dollar, giving a direct cross rate of about 105.41 rupees per pound, or ₹105,410 at the mid-market rate.

Instead, the sending bank converts the pounds to dollars at 1.25, producing $1,250. An intermediary deducts a $20 fee, leaving $1,230. The beneficiary's bank converts at 82.00 rupees per dollar, crediting ₹100,860. The supplier receives ₹4,550 less than the mid-market value, about 4.3% of the payment, made up of two spreads and one deduction. If the invoice was for ₹105,000, the payment arrives as a short-paid payment and must be chased.

The direct cost is the second spread or FX markup, plus any intermediary fees. Indirect costs include reconciliation work when amounts do not match invoices, disputes with suppliers, and the risk that the second conversion happens at a rate set by a bank the sender has no relationship with. Fees deducted along the way depend partly on the OUR, SHA and BEN charge codes chosen, but these codes govern fees, not exchange rates, so they do not prevent the second conversion.

For consumers, US rules under the Dodd-Frank remittance rule require remittance providers to disclose the exchange rate and the amount to be received, which makes the total cost more visible. Business payments are generally not covered by such consumer protections, so firms need to compare the all-in cost themselves.

• Send the payment in the beneficiary's own currency, so a single conversion happens at the sending end at a known rate.
• Use providers with local payout in the destination currency, which convert once and settle through local rails on the last mile.
• Hold balances in the relevant currencies, for example in a multi-currency account, to match receipts and payments.
• Decline DCC at card terminals and let the card issuer convert.

Initiatives to settle trade directly between local currencies, such as cross-border RMB settlement or bilateral local-currency settlement agreements between central banks, aim in part to remove the dollar leg. Money transfer operators specializing in a payment corridor also reduce double conversion by building direct liquidity in exotic currencies, sometimes through liquidity providers or stablecoin-based routes.