Most banks quietly profit on currency conversion. Here's how exchange rates actually work — and what to look for when comparing FX costs.
Every time you convert one currency to another, there is a cost — even when a bank advertises 'no fees'. That cost is usually embedded in the exchange rate itself, as a 'spread' between the mid-market rate (the true market rate, available on Google or XE.com) and the rate actually applied to your transaction. A bank might show the mid-market rate on their website but apply a 2–4% margin when you actually convert.
The mid-market rate is the midpoint between the current buy and sell prices for a currency pair on global forex markets. It is not a rate that any individual customer can trade at — it is a benchmark. What matters is how far from that benchmark the rate applied to your transaction sits.
Traditional banks typically embed a 2–4% FX margin, which on a $10,000 transfer amounts to $200–$400 in hidden cost. Add a flat transfer fee of $15–$40, and the total cost of sending money internationally through a traditional bank can easily reach $400–$500 per transaction.
Bank of Asia Online applies the mid-market rate and charges a transparent flat fee of $8.00 plus 0.5% of the transfer value. On a $10,000 transfer, that is $58.00 total — a fraction of what traditional banks charge. Our Currency Converter tool shows you exactly what the recipient will receive before you confirm the transfer.
When comparing FX providers, always ask: (1) what rate do you apply — mid-market or a marked-up rate? (2) are there any additional fees beyond the stated transfer fee? (3) are there correspondent bank fees that will reduce what the recipient receives? Transparent providers answer all three questions clearly before you transact.
For frequent or large FX conversions, Bank of Asia Online also offers FX forward contracts for qualifying business customers — allowing you to lock in a rate today for settlement up to 90 days in the future. This protects against adverse rate movements if you have known future FX obligations. Contact our business banking team for details.