Every trip starts with the same question: how much money to exchange before leaving, and what to pay with once you are there. The answer depends less on the destination than on three decisions you make at the terminal.
The golden rule at every terminal
When a card terminal or ATM offers to charge you in your home currency instead of the local one, always refuse. It is called dynamic currency conversion (DCC), and it hides a 3–10% markup behind a screen that looks like a convenience. Choose to always pay in the local currency and let your own bank do the conversion — even mediocre bank rates beat DCC almost every time.
How much cash to carry
- **Cash-heavy destinations:** Japan, Germany, Southeast Asia outside big cities, markets and rural areas everywhere
- **Card-first destinations:** the Nordics, the UK, China (mobile payments), most of urban North America
- A reasonable default: carry **one to two days of spending** in local cash, and top up from ATMs rather than exchanging large amounts up front
The ATM strategy
Airport exchange desks have the worst margins in the industry — use them only in emergencies. Withdrawing from bank-affiliated ATMs at your destination usually gives you close to the mid-market rate. The standard pattern: withdraw a few days' worth at once so fixed ATM fees spread thinner, and decline the machine's offer to convert for you (same DCC trap).
Cards that travel well
- Cards with **no foreign-transaction fee** save the typical 1–3% surcharge on every purchase
- **Prepaid travel cards** lock in a rate — useful for budgeting, but you lose the upside if the rate moves your way
- **Mobile wallets** (Apple Pay, Google Pay) ride on your card's terms and are accepted more widely than many travelers expect
Keep a small reserve of hard currency
A folded stash of US Dollars or Euros is the universal backup: exchangeable in every country on earth, and the classic escape hatch when cards fail, ATMs are down, or a local currency is in turmoil. You will probably never need it — that is exactly what a backup is for.
The checklist
1. Notify your bank, or better, use a no-foreign-fee card
2. Take a small amount of home cash for the first hours, not the whole budget
3. Withdraw locally at bank ATMs, decline conversion offers
4. Always pay in local currency
5. Keep a USD/EUR reserve somewhere separate from your wallet
Do those five things and you will beat the rate most travelers get, without thinking about money again until the flight home.