Czechia's currency is the koruna, not the euro

Despite being a European Union member, Czechia has not adopted the euro, and its currency is the Czech koruna, denoted CZK or Kč. Some tourist-facing businesses in central Prague accept euros directly, but the exchange rate they apply for that convenience is set by the business itself and is reliably worse than paying in koruna or by card. Treat euro acceptance as an emergency option, not a normal way to pay.

How exchange offices are regulated, and where the trap is

The Czech National Bank (ČNB) — the country's central bank and financial regulator — publishes a set of consumer protection rules for currency exchange bureaux that are worth knowing before you exchange any cash in Prague:

  • A bureau must show the exchange rate clearly and is only permitted to advertise its least favourable rate publicly. Any better rate is only offered once you're at the counter, often for larger amounts or after asking, which is exactly why comparing bureaux by their advertised sign alone can mislead you.
  • Bureaux cannot legally charge a separate commission on top of the quoted exchange rate, with narrow exceptions such as exchanging coins or cheques.
  • You must be shown the buy and sell rates clearly, and the rate that applies depends on which direction you're exchanging — the rate for converting your currency into koruna is different from the rate for converting koruna back.
  • For exchanges above roughly 1,000 EUR in value, the bureau is required to give you written pre-transaction information, including their identification and your right to cancel, before you hand over cash.
  • You always have the right to a receipt or confirmation slip — ask for one and keep it.
  • For transactions up to roughly 1,000 EUR equivalent, ČNB rules give you a three-hour window to cancel the exchange without penalty, using the central bank's previous working day's exchange rate as the basis for reversing it.

If a bureau refuses to show you the rate clearly before the transaction, tries to add a commission on top of the quoted rate, or won't give you a receipt, that is a rules violation you can raise with the bureau directly, and escalate to the Czech National Bank or the Financial Arbitrator if unresolved.

Cards, ATMs and dynamic currency conversion

Card payments, including contactless, are widely accepted across Prague in shops, restaurants and on public transport ticket machines, and this has become the default way most visitors pay for anything beyond very small purchases.

The one recurring trap sits inside the payment terminal itself: many card terminals and ATMs in Czechia, as in much of Europe, offer dynamic currency conversion (DCC) — a prompt asking whether you want to be charged in your home currency instead of koruna. This sounds convenient because it shows you a number in a currency you recognise immediately, but the exchange rate applied is set by the merchant's payment processor, not by your own card network or bank, and it is consistently worse than the rate your card would otherwise use.

This applies to ATM withdrawals too — if an ATM offers to show your withdrawal amount in your home currency before confirming, decline that "guaranteed rate" and withdraw in koruna instead.

A simple approach that avoids both traps

  1. Bring a card that doesn't charge foreign transaction fees if you have one, since this removes most of the pressure to carry or exchange large amounts of cash.
  2. Exchange only a modest amount of cash on arrival for small purchases, cash-only pubs, or situations where cards aren't accepted.
  3. Compare two or three bureaux de change rather than using the first one you see, and confirm the rate at the counter before handing over any cash.
  4. Keep the exchange receipt in case you need to invoke the three-hour cancellation right.
  5. At every card terminal and ATM, choose to pay or withdraw in CZK, declining any offer to convert to your home currency.

Where cash still matters

Some older or smaller establishments, particularly traditional pubs described in VoyageWindow's guide to how a Czech hospoda works, prefer or require cash, so carrying some koruna in small denominations for a pub visit is a reasonable habit even if you otherwise pay almost everything by card.

What to confirm before you rely on this

Exchange rates and any commission or fee rules can change, and this guide does not quote a specific koruna-to-euro or koruna-to-dollar rate, since that number moves daily — check the Czech National Bank's own published exchange rate page for the current rate before converting a significant sum, rather than relying on a rate quoted anywhere else.