What is the mid-market exchange rate?
The mid-market rate โ also called the interbank or spot rate โ is the midpoint between the price at which banks buy a currency and the price at which they sell it. It is the fairest, most neutral reference rate, and it is the rate you see on Google, Reuters and in the converter on this site.
Here is the catch: it is almost never the rate you get. Banks, card networks and money-transfer services add a margin on top of the mid-market rate โ often 2โ5% โ and sometimes a fixed fee as well. That margin is where much of their profit on currency comes from, and because it is baked into the rate rather than shown as a fee, it is easy to miss.
How to spot the markup
Compare the rate you are being offered against the live mid-market rate above. If a provider offers you 1 USD = 0.85 EUR while the mid-market rate is 0.88, that ~3.4% gap is your real cost โ even if the service advertises "no fees".
Providers that pass on the true mid-market rate and charge a small, transparent fee instead (rather than hiding a margin in the rate) will almost always work out cheaper for international transfers and card spending.