Currency · 3 min read ·
Why your bank’s exchange rate differs from the one online
The rate you see online is not the rate you get at the bank or the airport. Here is where the difference comes from, and how to work out what it costs you.
You look up an exchange rate online, then pay with your card abroad or change cash, and get noticeably less than you expected. Nobody made a mistake: you are looking at two different kinds of rate.
The mid-market rate
The rate shown by search engines and converters is the mid-market rate: the midpoint between the prices at which banks buy and sell a currency on the wholesale market. It is a fair reference, but almost no consumer can trade at it.
The spread and the fees
Banks, card issuers and exchange offices sell currency a little above that rate and buy it a little below; the gap is the spread. Many also add a foreign transaction fee, often a few percent. At airports and hotels the total markup can be much larger.
Work out the real cost
Mid-market rate: 1 USD = 3.70 ILS
Bank sells at: 1 USD = 3.85 ILS
Markup: (3.85 − 3.70) / 3.70 ≈ 4.1%
On 1,000 USD: 3,850 instead of 3,700 ILS → 150 ILS moreThe numbers above are only an illustration, but the method works with any offer: compare the rate you are given with the reference rate and divide the difference by the reference.
Avoid the most expensive option
When a card terminal or an ATM abroad offers to charge you in your home currency, decline and pay in the local currency. This “dynamic currency conversion” usually comes with a worse rate. Before changing a large amount, compare a few offers against the reference.
Card, cash or transfer?
- Card payments abroad: card networks set their own daily rate, usually close to the reference, but your bank may add a foreign transaction fee on top.
- Cash at an exchange office: the spread is usually the widest, especially at airports, hotels and tourist areas.
- ATM withdrawals abroad: the rate is often fair, but watch for fixed fees from both the ATM owner and your own bank, and refuse conversion into your home currency.
- International transfers: compare the total amount the recipient will get, not just the fee. A “free” transfer can hide a wide spread in the rate.
Why the rate keeps changing
Currencies trade almost around the clock on working days, so rates move all day. Over the weekend the main markets are closed, and many providers add an extra margin to protect themselves against Monday’s opening price. Reference rates such as those of the European Central Bank are published once per working day, around 16:00 Central European Time, so they are a snapshot, not a live price.
A simple habit
Before a trip, note the reference rate and the markup you are willing to accept, for example 2%. At the counter, multiply the reference by 1.02 and compare. If the offer is much worse, walk away or pay by card in the local currency.
Know the reference
The 4Dev Currency Converter shows an indicative mid-market rate for 155+ currencies and 45 cryptocurrencies, with the source and the time next to every result. Rates for the 31 most-traded currencies come from the European Central Bank’s daily reference rates. It is a reference, not a bank quote, which is exactly what you need to see how much a bank adds.