Cards are widely used across Spain and ATMs are easy to find in cities, shopping areas and many historic town centres. The useful skill is not finding a machine; it is separating the cash amount from the two prices that may sit around it.
One screen, two conversion routes
The fee screen is an offer, not a verdict
Banco de España says the ATM must tell you whether a withdrawal charge applies and show the amount before cash is dispensed. You must also be given the option to stop, which makes comparing another bank's machine a real choice.
EUR keeps the ATM out of the exchange rate
When dynamic currency conversion appears, the machine offers to translate the withdrawal into the card's home currency. Paying in euros leaves the later conversion to the card issuer. Compare both only when the full rates and fees are clear.
Debit and credit withdrawals are different tools
A credit-card cash withdrawal can trigger a percentage fee, a minimum fee or interest under the card agreement. A travel-friendly debit card is usually the cleaner cash tool, while the credit card remains useful for purchases and deposits.
Cards are widespread, not compulsory everywhere
Visa and Mastercard acceptance is broad, but Spain's official tourism guidance notes that some businesses may set a minimum card purchase around EUR 10. Small notes and coins prevent a coffee or market purchase from becoming a negotiation.
Keep the backup out of the ATM trip
Store the second card separately and withdraw a practical amount rather than the entire travel budget. One blocked card, retained card or misplaced wallet should not control the rest of the journey.