No, the Euro is not an accepted currency for everyday transactions in Costa Rica. The official currency is the Costa Rican Colón (CRC), and the US Dollar (USD) is also widely accepted in almost all tourist areas, hotels, restaurants, and for tour operators. If you try to pay with Euros at a local grocery store (pulpería) or a taxi, they will most likely decline the payment as they cannot easily deposit or exchange Euros at local banks without significant fees. Even in high-end resorts, the exchange rate offered for Euros will be very poor. For travelers coming from Europe in 2026, the best strategy is to carry a small amount of US Dollars for immediate needs and then use a "no-fee" travel debit card to withdraw Colones from a local BCR or Banco Nacional ATM. ATMs are ubiquitous in cities like San José and tourist hubs like La Fortuna or Manuel Antonio. While credit cards are accepted almost everywhere, having Colones is essential for smaller purchases, local buses, and tipping in more remote areas. Always remember that if you pay in USD, you will often receive your change in Colones, usually at a slightly disadvantageous exchange rate.