Understanding Travel Currencies
Why the exchange rate on your screen is rarely the rate you actually get.
The exchange rate you see in a search bar — the 'mid-market rate' — is a reference price. It is the midpoint between what large banks will pay and accept for currency in wholesale volumes. You will almost never get it. Understanding the gap between that number and what actually leaves your account is one of the highest-return pieces of travel literacy.
Mid-market vs the rate you actually get
Every party that touches your money takes a slice. Individually, the slices look small. In aggregate across a trip they are not.
| Method | Typical markup | Cost on $1,000 |
|---|---|---|
| Airport currency exchange booth | 8–12% | $80–$120 |
| Hotel front-desk exchange | 6–10% | $60–$100 |
| High-street bank debit card | 2–4% + fixed fee | $25–$45 |
| Foreign-friendly travel card (Wise, Revolut, Charles Schwab) | 0–1% | $0–$10 |
| Credit card with no foreign-transaction fee | 0.5–1.5% | $5–$15 |
The difference between the best and worst options on a two-week trip is the price of two nice dinners — every time.
Dynamic Currency Conversion: the quiet tax
At a card terminal or ATM abroad you will often be offered a choice: pay in the local currency, or pay in your home currency. Always choose the local currency.
Paying in your home currency triggers 'Dynamic Currency Conversion' — the merchant's bank does the conversion at a rate they set, typically 3–7% worse than your own card network would. The screen will helpfully tell you the amount in dollars or euros and frame it as a convenience. It is not a convenience. It is a fee.
ATMs: how to use them without bleeding fees
- 01Use bank-branded ATMs inside or attached to a real bank branch. Standalone machines in tourist zones (Euronet, Travelex) charge €5–€10 per withdrawal plus poor rates.
- 02Withdraw larger amounts less frequently. Fixed fees punish small withdrawals. €300 once is cheaper than €50 six times.
- 03Decline the ATM's offered conversion. Always 'continue without conversion' or 'proceed in local currency'.
- 04Check whether your card refunds ATM fees. Some travel-friendly accounts (Charles Schwab in the US, Wise in many markets) refund or absorb them entirely.
How much cash to carry, by region
| Region | Card-friendly? | Cash to carry |
|---|---|---|
| Northern & Western Europe | Yes — cards work almost everywhere | €50–€100 for cafés and tips |
| Southern & Eastern Europe | Mostly — small towns prefer cash | €100–€200 |
| East Asia (Japan/Korea/Taiwan) | Mixed — Japan still cash-leaning | ¥20,000–¥40,000 |
| Southeast Asia | Cash-first in most markets and street food | Equiv. $100–$200 |
| Latin America | Mixed — cash for markets, cabs, small towns | Equiv. $100–$200 |
| Africa & parts of South Asia | Often cash-only outside major hotels | Equiv. $150–$300 |
Build redundancy into your payment stack
Cards get blocked, lost, demagnetised, or eaten by ATMs. Plan for it before it happens.
- Carry two cards from different networks (one Visa, one Mastercard).
- Store them in different bags. The card in your daypack is not redundant to the card in your wallet.
- Notify your bank of travel dates if your card issuer still uses geographic fraud rules.
- Keep a photo of both card numbers and the bank's international support line somewhere offline (a note in your phone counts).
- Carry $100–$200 in clean US dollars or euros as a last-resort reserve. Universally exchangeable.