How Currency Conversion Works When You Travel

By Alok Singh · Published

You check the exchange rate before a trip, then your card statement, an airport kiosk or a hotel bill shows a noticeably worse number. Nothing went wrong: you met the spread, the fees and, sometimes, dynamic currency conversion. Here's what each is and how to keep more of your money.

The mid-market rate: your benchmark

The mid-market rate is the midpoint between the prices at which banks buy and sell a currency on the wholesale market. It's the rate you see in search results and in most currency converter apps. Consumers almost never get exactly this rate, but it's the benchmark against which you measure every other offer.

Rule: before you exchange money or accept a rate, compare it with the mid-market rate. The gap is what you're paying.

Where the cost hides

1. The spread

Exchange kiosks and banks buy currency from you at one rate and sell at another. The difference, the spread, is their margin. Kiosks advertising "0% commission" usually make their money here, and airport and hotel counters often have the widest spreads.

2. Card foreign transaction fees

Many debit and credit cards add a foreign transaction fee, a percentage of every purchase made in another currency. Some travel cards charge none. Check your card's terms before you leave; it's one of the easiest savings.

3. ATM fees

Withdrawing cash abroad can involve your bank's fee, the local ATM operator's fee, and the exchange rate applied. Fewer, larger withdrawals usually cost less than many small ones.

4. Dynamic currency conversion (DCC)

This is the big one. When you pay by card abroad, a terminal or ATM may offer to charge you in your home currency "for convenience". That's dynamic currency conversion, and the rate is set by the merchant's provider, typically much worse than your card network's rate.

Always choose to pay in the local currency. If the terminal asks "Pay in EUR or USD?" while you're in Paris, choose EUR. At ATMs, decline the "guaranteed conversion" offer.

A simple travel money plan

  1. Before you go: check which of your cards has no foreign transaction fee and tell your bank you're travelling if they require it.
  2. Carry a little local cash for small purchases and arrival, but don't exchange large amounts at the airport.
  3. Pay by card in local currency for most purchases.
  4. Withdraw cash from bank-owned ATMs where possible, and decline DCC.
  5. Keep a converter handy to sense-check prices and offers on the spot.

Doing quick conversions in your head

Learn one easy anchor for each trip. If 1 euro is about 1.10 US dollars, then 20 euros is about 22 dollars and 100 euros about 110. If a dollar buys about 85 rupees, then 1,000 rupees is a little under 12 dollars. (Those rates are only examples; use the current one.) Mental anchors are perfect for "is this a good price?", but use exact numbers for anything that matters.

Rates move: refresh before big decisions

Exchange rates change constantly. Converting yesterday's rate is fine for a coffee, not for paying a deposit or comparing two hotel quotes in different currencies. Refresh the rate before any large payment.

Business and online purchases

The same traps apply online:

A converter that stays out of the way

The best converter for travel is the one you can open and read in two seconds, with rates that update on their own.

Fast conversions on your iPhone: Currency Converter : Fast (free, by the author of this guide) supports 150+ currencies, converts as you type with no "Convert" button, updates exchange rates automatically, shows the current rate for the pair you're converting, and uses three decimal places.

Summary

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