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When you send money to your family, you probably check the service fee. But there is another cost that almost no one sees coming: the difference between the exchange rate they offer you and the real market exchange rate. That silent margin can cost you more than the fee that actually appears on the screen.
The "real" exchange rate is the interbank rate, which is what banks use among themselves. No money transfer service can offer you that exact rate, but the gap between what they give you and what exists makes all the difference in what your family member receives.
What is the real exchange rate and why does it matter for your money transfers?
The exchange rate reflects how many units of one currency you get for each unit of another. When you exchange dollars for pesos, the price at which that exchange is made determines how much the person on the other side receives.
There is a reference exchange rate called the interbank rate: it is the rate at which large banks lend money to each other. Organizations like the Bank of Mexico (Banxico) and the U.S. Federal Reserve (Fed) publish this rate officially. It is the "pure" exchange rate, with no added margins.
The problem is that no service gives you that rate directly. As soon as the money passes through a financial institution or a transfer service, an adjustment to the exchange rate called an exchange margin is applied. That margin is the provider's profit on the currency exchange, and it is added to any visible fee you are already being charged.
What you see vs. what you don't see when sending a remittance:
Suppose the reference interbank rate is 19.00 pesos per dollar (this is an illustrative example; rates change daily, you can check the Félix exchange rate calculator to see the current rate):
| Service | Exchange rate offered | Amount received for $300 USD sent | Difference vs. reference rate |
|---|---|---|---|
| Interbank rate (reference) | 19.00 | $5,700 MXN | $0 MXN |
| Traditional bank (illustrative example) | 17.50 | $5,250 MXN | -$450 MXN |
| Standard transfer service (illustrative example) | 18.40 | $5,520 MXN | -$180 MXN |
| Félix (illustrative example) | 18.80 | $5,640 MXN | -$60 MXN |
The exact numbers vary every day, but the logic remains: the closer the offered exchange rate is to the interbank rate, the more your family member receives.
A difference of 1.50 pesos per dollar in the exchange rate can mean 450 pesos less on every $300 transfer, more than double what the average fee of a competitive service costs.
Why does the exchange rate go up and down, and what can you do about it?
The exchange rate is not fixed. It fluctuates every day, and sometimes several times a day, in response to economic and global factors:
Central bank interest rates: when the Fed raises rates in the U.S., the dollar tends to strengthen against other currencies. When Banxico adjusts its rates, the Mexican peso reacts.
Inflation in each country: high inflation in the destination country tends to weaken that currency, which may mean your family member receives more units of local currency, but with less real purchasing power.
Political and economic events: elections, debt crises, trade agreements, or geopolitical tensions affect the demand for each currency in global markets.
Speculation in currency markets: the currency market moves trillions of dollars a day. Large investment funds and banks bet on the direction of currencies, which amplifies the movements.
What you can control is not the exchange rate itself, but how close to the real rate each service gives you. That difference, the exchange margin, varies greatly between providers and is worth comparing along with the fee. Check out the article how much is the U.S. dollar worth? to understand how to read the reference rate before sending.
How Félix shows the exchange rate before you confirm your transfer
A practice that many services avoid is showing the exchange rate they will apply before you confirm the transaction. Traditional banks usually communicate the exchange rate only at the time of deposit, when it is already too late to compare.
Félix shows the exact exchange rate your family member will receive before you confirm the transfer, with no fine print. You can see how many pesos (or quetzales, lempiras, colones, or other local currency depending on the destination country) the person on the other end will receive before you commit to the transaction.
This is important because it gives you real information to compare. If you have questions about the current rate, you can check the Félix exchange rate calculator at any time to see the daily reference.
To learn more about how different services handle exchange rates, you can read the detailed comparison in compare the most popular money transfer services.
Frequently asked questions
Are the fee and the exchange margin the same thing?
No. The fee is the fixed or percentage charge that is explicitly shown in the transaction. The exchange margin is the difference between the exchange rate you are offered and the reference interbank rate. Many services charge both: a visible fee and an exchange margin that is not detailed separately. To compare services correctly, you should add both costs together and look at how many pesos your family member receives in total.
Is the Félix exchange rate always the same throughout the day?
The exchange rate fluctuates because the currency market operates continuously. The rate that Félix applies to your transaction is locked in at the moment you confirm the transfer. What is shown before confirming is the exchange rate in effect at that instant.
Is it better to wait for the exchange rate to go up to send more money?
Trying to predict the exchange rate is speculation, and currency markets are unpredictable even for economists. If your family member needs the money, send it. What you can control is choosing the service with the lowest exchange margin, which has a predictable and consistent impact on every transfer.
Does the exchange rate apply the same way for all countries that Félix sends to?
Each transfer corridor has its own exchange rate because the currencies are different. The dollar does not convert the same way to Mexican pesos as it does to Guatemalan quetzales or Peruvian soles. In all cases, Félix shows the exact exchange rate per country before you confirm.
Sources and references
Bank of Mexico (Banxico)
- FIX exchange rate: official reference rate for the Mexican peso against the dollar. The basis for evaluating the exchange margin of any money transfer service.
United States Federal Reserve (Fed)
- Federal Reserve: Foreign Exchange Rates: daily exchange rates published by the Fed for major currencies.
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