# Why the exchange rate at the counter never matches the rate you saw online

> The rate on this site, the rate your bank card uses and the rate at an airport currency counter are three different numbers. Here is where the gap comes from and how to estimate what it costs you.

Source: https://roamfact.com/en/analysis/exchange-office-rate-vs-market-rate/

Published: 2026-10-12

You check a currency converter before a trip, see one number, then land abroad and get a worse one at the exchange counter or on your card statement. That is not a scam — it is three different rates doing three different jobs, and knowing which one applies to you is what actually saves money.

## Three rates, three purposes

The reference market rate — the one shown on this site and most finance apps — is the rate at which banks trade currency with each other in large amounts. Nobody retail-size can buy at it directly, but it is the honest benchmark everything else is measured against. The rate your card network (Visa, Mastercard, Amex) applies when you pay abroad is usually very close to this market rate, plus whatever your own bank adds as a foreign transaction fee — commonly 0–3%. The rate at a physical currency exchange counter is a separate, worse number: it is quoted as two prices, buy and sell, with the gap between them — the spread — built in to cover the counter's costs and risk.

## Where the spread comes from

A currency counter holds physical cash, pays rent and staff, and absorbs the risk that rates move while that cash sits in a drawer. All of that gets priced into the spread between its buy and sell rates. Airport counters and hotel lobby kiosks have the highest rents and the most captive customers, so they typically post the widest spreads of any legal exchange option — sometimes 8–12% worse than the market rate.

## How to estimate what you are losing

Compare the counter's sell rate (what they give you per dollar) against the market rate at the same time. Divide the difference by the market rate and you get your hidden fee as a percentage. At a market rate of 20 and a counter rate of 18.5, you are losing about 7.5% — on a $500 exchange that is roughly $37 gone before you have spent a cent. A dynamic currency conversion (DCC) prompt at a foreign card terminal — the screen that offers to charge you in US dollars instead of the local currency — works the same way and is almost always worse than letting your own card network convert it; decline it and pay in local currency.

## How to pay less

Use a no-foreign-transaction-fee credit card for purchases wherever cards are accepted — for most US destinations that alone beats any cash exchange. For cash, withdraw from a bank-branded ATM rather than an independent currency counter, decline any "guaranteed rate" or conversion prompt the ATM offers, and withdraw larger amounts less often since many ATMs charge a flat fee per withdrawal regardless of size. Avoid exchanging at airports and hotels if you can wait until you reach a city center bank or ATM.