Finance glossary
Exchange Rate Margin
Also known as: FX margin, Currency spread
In simple terms
The exchange rate margin is the gap between the “real” exchange rate and the slightly worse rate a bank or provider actually gives you — a hidden cost of converting money.
On this page
What does exchange rate margin mean?
The exchange rate margin is the difference between the mid-market (“real”) exchange rate you see on the news and the rate a provider actually offers you. That gap is effectively a charge, even when there is “no fee”.
It applies when you buy travel money, spend abroad, or send money overseas.
How the margin works
A provider takes the mid-market rate and adds a margin, giving you slightly fewer units of foreign currency (or pounds) than the true rate would. A “0% commission” deal can still have a wide margin baked into the rate.
To compare fairly, look at how many units you actually receive, not the advertised fee.
How could this affect me?
The margin is easy to miss but can cost more than an upfront fee. Comparing the final amount you get from different providers — and using services that convert at or near the mid-market rate — saves money.
Beware “no fee” or “commission-free” claims that hide a poor rate.
Things to watch out for
- “0% commission” can still hide a wide margin in the rate.
- Compare the final amount you receive, not the advertised fee.
- Airport and last-minute currency deals often have the worst margins.
General information, not personal advice
Consumer Credit is an independent information service. We do not provide regulated financial advice or sell financial products. For advice on your own situation, speak to an appropriately authorised firm or a free service such as MoneyHelper. About Consumer Credit.
Sources
We checked this page against these official and authoritative sources.
- MoneyHelper, Getting the best travel money deal (opens in a new tab). Accessed 22 Aug 2026.