Zero conversion fee: where did the difference go?

No fee answers a question about one line of a price list. Customers and merchants need a different answer: how much leaves one side and how much reaches the other. The gap can include the exchange rate, the order of deductions and sometimes a second conversion. Start with arithmetic that does not depend on trusting an advertisement.

A hypothetical EUR 1,000 budget

Assume a sender can spend exactly EUR 1,000. Both fictional providers use the same funding and delivery method, and there are no taxes, intermediary deductions or recipient fees. The rates below are invented for explanation, not live offers.

• Provider A: EUR 10 is deducted from the budget; EUR 990 is converted at USD 1.08 per EUR.
• Provider B: no transfer fee; EUR 1,000 is converted at USD 1.06 per EUR.

Provider A delivers 990 × 1.08 = USD 1,069.20. Provider B delivers 1,000 × 1.06 = USD 1,060.00. With the same total spend, A delivers USD 9.20 more despite its visible fee.

The effective outcome is USD 1.0692 received per euro paid for A, compared with USD 1.06 for B. This measure incorporates the fee because its denominator is the total sender outlay, not only the amount converted.

Choose a comparison that matches the job

There are two common questions. With a fixed sender budget, how much reaches the recipient? With a fixed recipient obligation, how much must the sender pay? Do not mix them. A supplier invoice for a precise amount is different from sending whatever a fixed budget can buy.

Also match the funding method, delivery route and promised timing. Comparing a bank-funded transfer arriving later with a card-funded transfer arriving sooner may be commercially useful, but it is not a like-for-like price comparison.

The World Bank’s remittance methodology separates the transaction fee from the exchange-rate margin. A fee label alone therefore does not describe the full currency-conversion cost. World Bank methodology.

Use a benchmark carefully

Now assume an illustrative comparison rate of USD 1.10 per EUR at the same moment. The notional no-cost outcome would be USD 1,100. A’s shortfall is USD 30.80, or 2.80% of that benchmark outcome. B’s shortfall is USD 40, approximately 3.64%.

For A, the EUR 10 fee is worth USD 11 at the illustrative benchmark. The difference between 1.10 and 1.08 on EUR 990 contributes another USD 19.80. Together they explain the USD 30.80 shortfall. Adding the same fee again would double-count it.

A benchmark is an analytical reference, not a rate you are necessarily entitled to transact at. The ECB explicitly publishes its reference rates for information and discourages their use for transactions. Do not present a reference rate as a guaranteed retail quote. ECB reference-rate explanation.

When the recipient needs an exact amount

Reverse the earlier illustrative example. The recipient needs exactly USD 1,080. Provider A adds a fixed EUR 10 fee to the amount exchanged and keeps its rate at USD 1.08 per euro. Exchange EUR 1,000 and pay EUR 1,010 in total. Provider B charges no explicit fee but offers 1.06: total spending is approximately EUR 1,018.87, rounded to cents. These invented terms show why the direction of the calculation matters.

For an actual quote, check rounding rules and whether the recipient amount is guaranteed. If a possible intermediary-bank deduction is unknown, an honest comparison preserves that uncertainty rather than presenting a falsely precise total. Do not assume a zero deduction simply to finish a spreadsheet.

Ask where the uncertainty sits

In a real quote, identify which amounts are guaranteed and which are estimates. Ask when the rate is locked, when it expires and whether delayed funding changes it. Check whether charges are paid on top, deducted before conversion or taken from the recipient’s amount.

For covered US consumer remittances, the CFPB describes disclosure of applicable rates, fees and expected delivery amounts, with specified limitations and exceptions. Those protections should not be assumed to govern every business transfer or every country. CFPB’s scoped explanation.

For merchant payouts, write down whether revenue collection and payout involve separate conversions. If a refund might occur, ask which currency amount will be refunded and how any later conversion is priced. These questions reveal exposure without assuming a particular provider policy.

A refund tests the other half of the transaction

For merchants, add a scenario where the customer pays in one currency, settlement arrives in another, and a partial refund follows. Record the customer obligation, actual refund and effect on the settlement balance separately. Do not infer the reverse-conversion result from the original rate unless the agreement promises it.

Retain the initial quote and actual money records with timestamps. This helps distinguish a rate change from a different execution date, rounding or a separate deduction. When comparing months, include the mix of currency corridors and transaction sizes. Average cost can rise because the business changed even while the provider’s pricing remained the same.

For the next comparison, retain two numbers: total sender outlay and net recipient proceeds. Add the quote time and any unresolved deductions. That record makes a zero-fee claim testable.