ReviewedEducational article · Updated Oct 2026
Key takeaways
- The widely quoted rate is the mid-market rate, which consumers rarely get.
- Providers earn through a spread on the rate, explicit fees, or both.
- The best comparison is: how much of the target currency will I receive?
- “No fee” does not mean no cost.
If you have ever exchanged money and received less than the number on your phone suggested, you have met the exchange spread. Understanding how it works makes it easier to choose between a bank, a card, a transfer service and an airport kiosk.
The mid-market rate
The mid-market rate is the midpoint between the prices at which currency is bought and sold in wholesale markets. It is a useful benchmark, but it is not a price that most customers can actually trade at.
Spread and fees
- Spread: the provider gives you a worse rate than the mid-market rate and keeps the difference.
- Percentage fee: a charge proportional to the amount converted.
- Fixed fee: a flat charge per transaction, which matters more on small amounts.
A worked comparison
Suppose the mid-market rate is 0.92 EUR per USD and you want to convert 1,000 USD. Three hypothetical providers:
- Provider A (no fee, rate 0.90): you receive 1,000 × 0.90 = 900.00 EUR.
- Provider B (rate 0.915, $5 fixed fee): (1,000 − 5) × 0.915 = 910.43 EUR.
- Provider C (rate 0.92, 1.5% fee): 920 × 0.985 = 906.20 EUR.
Provider A advertises no fees, yet it gives you the least: about 2.2% below the mid-market result of 920 EUR. Provider B, with a visible fee, comes out best in this example. The only reliable comparison is the final amount received.
Compare providers by what lands in the destination currency, not by the rate or the fee alone.
Practical tips
- When paying by card abroad, choose to be charged in the local currency. Offers to charge in your home currency usually include a markup.
- Check whether your card issuer adds a foreign transaction fee.
- For large transfers, small differences in the rate matter more than small fixed fees; for small transfers, the reverse.
- Rates move during the day, so a quote is valid only for a short time.
About our converter: our tool does not fetch live rates. You enter a rate you were quoted and an optional fee, and it shows what you would receive and the effective rate.
What this leaves out
The numbers above are hypothetical and are not offers from any real provider. Real costs depend on the provider, country, amount and payment method.
Common mistakes to avoid
- Judging a provider by the fee alone. A zero fee with a poor rate can cost more than a visible fee with a good rate.
- Accepting conversion at the point of sale without checking the rate; the terminal’s own rate often includes a markup.
- Comparing quotes taken at different times. Rates move; compare at the same moment.
- Forgetting the receiving side. Some transfers incur fees at the recipient bank as well.
Quick glossary
- Mid-market rate
- The midpoint between wholesale buy and sell prices.
- Spread
- The gap between the mid-market rate and the rate a provider offers you.
- Effective rate
- The amount received divided by the amount sent, after all fees.
- Markup
- A percentage added on top of the mid-market rate.
Try it yourself
Get three quotes for the same amount and calculate the effective rate for each (amount received ÷ amount sent). Rank them by that figure rather than by the advertised rate or fee.
Further reading from official sources
These are general educational resources. Rules and figures differ by country, so look for your own country’s equivalent.
Related reading
This article is for general educational purposes only and is not financial advice. Examples use simplified, hypothetical numbers and ignore taxes, fees and personal circumstances. Consider speaking with a qualified professional before making financial decisions. See our full disclaimer.