Category: Foreign Exchange & Currency Risk
Of all the hidden costs in cross-border payments, double currency conversion is perhaps the most pernicious. It operates silently, often without the knowledge of the business making the payment, and it can add three to six per cent to the cost of a single transaction. For businesses that make dozens of such payments per year, the cumulative cost can be staggering.
This article examines how double currency conversion occurs, why it is so common, and — most importantly — how to identify and eliminate it from your payment operations.
How Double Conversion Happens: The USD→EUR→CNY Chain
The classic double conversion scenario occurs when a payment must pass through an intermediate currency before reaching its destination. Consider a European business that needs to pay a Chinese supplier in renminbi. The business holds euros. The payment must be converted from euros to renminbi. Simple enough — except that many payment providers do not offer a direct EUR/CNY conversion. Instead, they convert the euros to dollars first, and then convert the dollars to renminbi. Two conversions, two spreads, two opportunities for the provider to earn a margin.
Here is how the numbers stack up. Suppose the business needs to pay the equivalent of one hundred thousand dollars in renminbi. The provider's EUR/USD rate carries a spread of 0.5 per cent, and the USD/CNY rate carries a spread of 1 per cent. The combined cost is not 1.5 per cent — it is closer to 1.505 per cent, because the second spread is applied to a principal that has already been reduced by the first spread. In practice, the total cost on a double conversion is typically 2 to 3 per cent, compared with 1 to 1.5 per cent for a direct conversion.
For a single transaction of one hundred thousand dollars, the difference is five hundred to fifteen hundred dollars. For a business making twenty such transactions per year, the annual cost of double conversion ranges from ten thousand to thirty thousand dollars — money that is entirely wasted on unnecessary intermediate steps.
The Total Three to Six Per Cent Hit on a Single Deal
In the worst cases, double conversion can push the total FX cost on a single deal to three to six per cent. This occurs when both the intermediate and final conversions involve exotic or semi-exotic currencies, each carrying wide spreads.
Consider a Middle Eastern trading company that needs to pay a Vietnamese supplier. The company holds dirhams. The payment path might be: AED → USD → VND. The AED/USD spread is modest — perhaps 0.3 per cent — because the dirham is pegged to the dollar. But the USD/VND spread can be 2 to 3 per cent, reflecting the lower liquidity and higher settlement risk of the Vietnamese dong. The total cost: 2.3 to 3.3 per cent, on a corridor where a direct conversion might cost 1.5 to 2 per cent.
These calculations assume that the intermediate conversion occurs at competitive rates. In practice, some providers apply wider spreads on the intermediate leg precisely because the customer is unlikely to notice — the rate on the intermediate pair is not displayed prominently, and the customer's attention is focused on the final conversion rate. This opacity means that the actual cost of double conversion may be even higher than the headline numbers suggest.
Now consider a more complex scenario: a British firm paying a Brazilian supplier. The path might be GBP → USD → BRL. The GBP/USD spread might be 0.5 per cent. The USD/BRL spread might be 1.5 to 2 per cent. Total: 2 to 2.5 per cent. And if the provider routes through an additional intermediate step — say, GBP → EUR → USD → BRL — the cost compounds further, reaching 3 to 4 per cent or more.
The most insidious aspect of these multi-step conversions is that they are often invisible to the business making the payment. The payment instruction simply says "convert X pounds to BRL and send to this account." The provider handles the rest, and the customer sees only the final rate. Without explicitly asking the provider to disclose the conversion path — and many providers make this information surprisingly difficult to obtain — the business has no way of knowing that a direct GBP/BRL conversion would have been significantly cheaper.
These costs are rarely disclosed to the customer. The payment provider presents a single rate — the rate at which the customer's currency is converted into the destination currency — without revealing the intermediate steps or the individual spreads applied at each stage. The customer sees a rate that looks plausible but has no way of knowing how much of the spread is due to the underlying market and how much is due to unnecessary intermediate conversions.
Why Payment Platforms Route Through Intermediate Currencies
Understanding why double conversion occurs is essential for preventing it. There are several reasons why payment platforms route through intermediate currencies rather than offering direct conversion.
Infrastructure Limitations
Many payment platforms were originally built around dollar-centric payment infrastructure. Their systems are optimised for converting everything to and from dollars, and adding direct corridors for less common currency pairs requires significant engineering investment. Until the volume justifies the investment, the platform routes payments through the existing dollar infrastructure, regardless of the cost to the customer.
Liquidity Management
Providers maintain liquidity pools in various currencies to facilitate conversions. A provider may have deep liquidity in dollars and euros but limited liquidity in renminbi, rupees, or dong. Rather than building liquidity in every possible currency pair, they route through their deepest liquidity pools, even when this results in an additional conversion step.
Revenue Maximisation
It would be naïve to ignore the revenue incentive. Each conversion step generates a spread, and the provider earns a margin on each. While the additional margin on a double conversion may be modest per transaction, it accumulates rapidly across millions of transactions. A provider that routinely routes payments through an intermediate currency earns more than one that offers direct conversion — and the customer pays the difference.
This revenue incentive creates a structural misalignment between the provider's interests and the customer's. The customer benefits from the most efficient routing — the fewest conversions, the tightest spreads, the lowest total cost. The provider, in many cases, benefits from the least efficient routing, as each additional conversion step generates additional revenue. This misalignment is not conspiratorial; it is a natural consequence of a pricing model that charges per conversion. But it is a misalignment that the customer must be aware of and actively manage.
Regulatory Convenience
In some cases, regulatory requirements make it easier to route payments through a major currency. Dollar-denominated payment corridors are well-established, with standardised compliance procedures and established correspondent banking relationships. Routing through dollars may be the path of least regulatory resistance, even when a direct corridor is technically available.
The Growing Availability of Direct Currency Corridors
The good news is that direct currency corridors are becoming more widely available. As trade flows between non-dollar economies have grown, payment providers have invested in building the infrastructure to support direct conversions. Today, direct corridors exist for many of the most commonly traded currency pairs, including EUR/CNY, GBP/CNY, EUR/INR, and several others.
The availability of direct corridors varies by provider, and not all providers offer the same range of direct conversions. Some leading digital banks and FX providers have invested heavily in expanding their direct corridor offerings, recognising that customers who discover they are paying for unnecessary intermediate conversions will migrate to providers that offer more efficient routing.
The emergence of managed business workspace models — which integrate multi-currency accounts, payment processing, and FX within a single operational perimeter — has further accelerated the availability of direct corridors. Because these workspaces manage the full spectrum of a business's financial operations, they have a commercial incentive to route payments efficiently, as the cost of double conversion directly reduces the value proposition of the workspace. This alignment of interests between provider and customer represents a meaningful departure from the traditional model, where the provider's revenue increases with each conversion step.
For international operators, the implication is clear: when evaluating a payment provider, the range of direct currency corridors is a critical — and often overlooked — factor. A provider that offers a slightly worse rate on EUR/USD but provides direct EUR/CNY conversion may be significantly cheaper overall for a business that trades with China.
How to Identify and Eliminate Unnecessary Conversion Steps
Identifying double conversion requires vigilance and a willingness to ask uncomfortable questions of your payment providers. Here are the practical steps you should take.
First, ask your provider explicitly whether your payments are being routed through an intermediate currency. A reputable provider should be able to tell you the precise conversion path for any given payment. If they cannot — or will not — provide this information, it is a strong indication that the routing is not in your favour.
Second, compare the rate you receive against the mid-market rate for the direct currency pair. If the spread on the direct pair is significantly wider than what you would expect based on the spreads for the individual legs, it may indicate that the payment is being routed through an intermediate currency with a wider cumulative spread.
Third, monitor your payment confirmations for evidence of intermediate conversions. Some providers include details of the conversion path in their transaction records, even if they do not proactively disclose it. Look for references to intermediate currencies or multiple conversion steps.
Fourth, test alternative providers. If you suspect double conversion is adding to your costs, try routing the same payment through a different provider that offers direct conversion for your corridor. Compare the net amount received by the beneficiary — the ultimate test of which routing is more efficient.
Fifth, negotiate directly with your provider. If you can demonstrate that a more efficient routing is available elsewhere, your existing provider may be willing to offer direct conversion as a concession to retain your business. The key is to bring data — not complaints — to the negotiation.
The Case for Holding Multiple Currency Balances
The most robust defence against double conversion is to maintain balances in the currencies you transact in most frequently. When you hold a balance in the destination currency, you eliminate the need for conversion entirely — the payment is made directly from your existing balance.
This approach is particularly effective for businesses that make regular payments in the same currencies. If you pay Chinese suppliers monthly, maintaining a renminbi balance allows you to fund those payments directly, without converting from your reporting currency each time. The renminbi balance can be replenished periodically through a single, larger conversion — ideally at a negotiated rate that is more favourable than the rates available on individual payments.
Multi-currency account facilities are the enabling technology for this strategy. Providers that offer comprehensive multi-currency accounts — allowing you to hold, receive, and pay in a range of currencies — give you the flexibility to minimise conversions and eliminate double conversion risk entirely.
Conclusion
Double currency conversion is a silent margin killer that costs international businesses billions of dollars annually. It thrives on opacity, infrastructure inertia, and the natural tendency of businesses to focus on explicit fees rather than hidden spreads. But it is not inevitable. By understanding how double conversion occurs, identifying it in your payment operations, and demanding direct corridors from your providers, you can eliminate this unnecessary cost and retain more of the margin your business earns.
In a competitive international market, the difference between a business that tolerates double conversion and one that eliminates it is not merely a difference in cost — it is a difference in competitiveness. Every percentage point saved on FX is a percentage point that can be reinvested in the business, passed on to customers as more competitive pricing, or retained as profit. The silent margin killer can be silenced — but only if you are willing to listen for it.