Yes, banks convert currency, and they charge you for it
Banks convert currency every day. When you exchange dollars for euros, move money to another country, or use a debit card abroad, a bank is involved in that conversion. The bank buys the foreign currency on the wholesale market, sells it to you at a marked-up rate, and keeps the difference. That markup is how banks make money on currency exchange.
The conversion happens automatically in most cases. You do not have to ask for it or sign a separate agreement. When you swipe a card in another country or wire money overseas, the bank converts at whatever rate they choose to offer you—which is almost always worse than the rate you would see on financial news sites or currency trading platforms.
The cost of conversion varies widely depending on the bank, the currency pair, the amount, and the method you use. A wire transfer to another country might cost $15 to $50 in fees alone, plus a conversion rate that is 2 to 4 percent worse than the mid-market rate. Using a debit card abroad might add 1 to 3 percent to the cost. Some banks are more transparent about this than others.
Key Takeaways
- Banks convert currency at a rate higher than the mid-market rate shown on financial websites, and they keep the difference as profit.
- Wire transfers, debit card transactions, and credit card purchases all trigger currency conversion, each with different costs and rates.
- The actual cost of conversion includes both the markup on the exchange rate and any separate fees the bank charges for the transaction.
- Specialty money transfer services and online banks often offer better conversion rates than traditional banks, though you should compare fees and rates before choosing.
- You can ask your bank what rate they will use before you convert, and some banks allow you to lock in a rate for a set period.
How banks profit from currency conversion
Banks do not convert currency at the mid-market rate—the rate at which banks trade with each other on the wholesale market. That rate changes constantly and is the most accurate reflection of what a currency is worth at any given moment. You can see it on sites like XE.com or OANDA, and it updates throughout the day.
Instead, banks add a markup to that rate. If the mid-market rate for euros is 1.10 dollars per euro, a bank might offer you 1.07 dollars per euro. You lose 0.03 dollars on every euro you buy. On a $5,000 conversion, that markup alone costs you roughly $150. The bank calls this the spread—the gap between what they pay for the currency and what they charge you.
Banks also charge separate fees for the transaction itself. A wire transfer to another country typically costs $15 to $50. An ATM withdrawal abroad might cost $3 to $5 per transaction. These fees stack on top of the conversion markup, so the total cost of moving money internationally can be substantial.
Where currency conversion happens and what it costs
Currency conversion occurs in different ways depending on how you move or spend money:
| Method | Conversion Rate Markup | Separate Fees | When It Happens |
|---|---|---|---|
| Debit card abroad | 1–3% | $0–5 per transaction | At the point of sale or ATM withdrawal |
| Credit card abroad | 1–3% | $0–3 (some cards charge nothing) | When the transaction posts to your account |
| Wire transfer | 2–4% | $15–50 | When the bank processes the transfer |
| ATM withdrawal abroad | 1–3% | $3–5 per withdrawal | Immediately at the ATM |
| Currency exchange at a branch | 2–5% | $0–25 | When you complete the transaction |
The markup and fees vary by bank. Large national banks like Chase, Bank of America, and Wells Fargo tend to charge higher markups and more fees than smaller banks or online banks. Credit unions sometimes offer better rates to members. The only way to know what your bank charges is to ask them directly or check their fee schedule online.
How to find out what rate your bank will use
Before you convert a large amount of money, call your bank and ask what rate they will offer you. Most banks can tell you the rate they will use for a wire transfer or currency exchange, and some will hold that rate for 24 to 48 hours while you decide. This is especially important if you are moving thousands of dollars.
Ask your bank three specific questions: What is the exchange rate you will use? What fees will you charge? Will you lock in that rate if I decide to proceed? Write down the answers and the date and time you called, in case there is a dispute later.
You can also compare rates across banks before you move money. Call or visit the websites of two or three banks and ask the same questions. The difference between banks can be hundreds of dollars on a large transfer. Some banks publish their rates online, though those rates may change by the time you actually convert.
Alternatives to bank currency conversion
If your bank's rates are poor, you have other options. Specialty money transfer services like Wise (formerly TransferWise), OFX, and Remitly often offer rates much closer to the mid-market rate and charge lower fees than banks. Wise, for example, charges a small percentage fee (usually under 1 percent) plus a small fixed fee, and uses the real mid-market rate. For a $5,000 wire transfer, Wise might cost $50 to $75 total, while a bank might cost $150 to $250.
Online banks and fintech companies sometimes offer better rates on debit card transactions abroad than traditional banks do. Some credit cards marketed to travelers charge no foreign transaction fees and offer better conversion rates. If you travel frequently or move money internationally often, it is worth opening an account with one of these services or switching to a card that does not penalize you for spending abroad.
For very large transfers or business payments, currency brokers can negotiate better rates than banks offer. These are typically used for amounts over $10,000, but if you are moving a significant sum, a broker's fee might be worth the savings on the conversion rate.
What happens when your bank converts currency on a credit card purchase
When you use a credit card in another country, the merchant's bank converts the transaction to dollars and sends it to your card issuer. Your card issuer then adds their own markup and charges it to your account. You do not see this happen in real time—it posts to your statement days or weeks later, sometimes at a different rate than the rate on the day you made the purchase.
This delay can work for or against you. If the currency strengthened against the dollar between the purchase date and the posting date, you pay less. If it weakened, you pay more. You have no control over this timing, and your card issuer does not lock in a rate when you swipe.
Some credit cards offer better conversion rates than others. Cards marketed to frequent travelers or international business users often have lower markups and may not charge a separate foreign transaction fee. If you spend abroad regularly, choosing the right card can save you hundreds of dollars per year.
When banks must disclose conversion rates and fees
Banks are required by federal law to disclose the exchange rate and fees they will charge before you complete a transaction, but the timing and format of that disclosure varies. For a wire transfer, you should receive a disclosure when you initiate the transfer. For a debit card transaction abroad, the disclosure may appear on your receipt or on your statement after the fact.
If you do not see a disclosure before you complete the transaction, ask for one. If the bank cannot provide it, that is a sign to use a different service. You have the right to know what you are paying before you pay it.
Some banks also allow you to dispute a conversion rate if you believe it was unfair or if the rate changed significantly between when you initiated the transaction and when it posted. This is rare and difficult to prove, but it is worth asking about if the amount is large.
Frequently Asked Questions
Can I refuse a bank's conversion rate and use a different one?
No, you cannot refuse your bank's rate once you have initiated a transaction. You can choose a different bank or service before you convert, but once the transaction is in process, the rate is locked in by the bank handling it. This is why comparing rates before you move money matters.
Do all banks charge the same markup on currency conversion?
No. Markups vary widely by bank, currency pair, and transaction size. Large banks typically charge 2 to 4 percent markups, while online banks and money transfer services may charge under 1 percent. The only way to know your bank's markup is to ask them or check their published rates.
Why does my bank's rate look different on their website than what I actually paid?
Banks update their published rates throughout the day, but the rate you actually receive depends on when your transaction is processed, not when you see the rate online. Rates can also vary by transaction type—a wire transfer might have a different rate than a debit card purchase. Always ask what rate applies to your specific transaction.
Is it cheaper to exchange currency before I travel or use my debit card abroad?
It depends on your bank and the card you use. Exchanging cash at a bank branch before you travel usually costs 2 to 5 percent in markup plus a fee. Using a debit card at an ATM abroad typically costs 1 to 3 percent plus a small ATM fee. Using a credit card with no foreign transaction fee is often cheapest. Compare your specific bank's rates before you travel.
Can I lock in a currency conversion rate?
Some banks allow you to lock in a rate for 24 to 48 hours before you complete a wire transfer or large currency exchange. Call your bank and ask if they offer rate locks, and for how long. Not all banks do this, and some charge a fee for it.