How Exchange Rate Markups Work: The Hidden Cost in Remittances
Understand how financial institutions construct retail exchange rate spreads, why Google rates differ from provider quotes, and how to spot them.
A deep dive into the interbank rate, why it is considered the only fair exchange rate benchmark, and how it impacts your remittance.
The Interbank Mid-Market Rate Explained
The mid-market exchange rate (also referred to as the interbank rate or spot rate) represents the midpoint between the wholesale "buy" (bid) and "sell" (ask) prices of two global currencies.
When major international financial institutions trade millions of dollars or euros with one another on currency trading exchanges, they transact at or extremely close to this rate.
The Difference Between Mid-Market and Retail Rates
- Mid-Market Rate: The rate you see on Google, Bloomberg, Reuters, and financial news networks. It contains zero retail markup.
- Retail "Send" Rate: The adjusted rate quoted to retail consumers when sending money abroad. It includes a profit margin built in by the provider.
- Retail "Buy" Rate: The rate quoted to tourists exchanging foreign banknotes at an airport kiosk, which often carries an even wider markup of 5% to 10%.
Why the Mid-Market Rate Matters to You
When evaluating international money transfer providers, the mid-market rate is the true benchmark of fair value.
If a company quotes an exchange rate inferior to the mid-market rate, the difference represents money diverted away from your recipient.
Only a handful of providers—such as Wise—pass through the exact mid-market rate to consumer transfers, charging a transparent, standalone service fee instead. Most other services bundle their profit into an altered exchange rate.