Yes, you can use euros on Brittany Ferries, and in fact, since March 1, 2023, the euro has been the primary reference currency for all transactions on board their fleet. This means that all prices in the restaurants, bars, and duty-free shops are displayed in euros first. While the company still accepts British pounds sterling (GBP) for cash and card payments, the price will be calculated at the checkout based on the current exchange rate provided by the Banque de France. Using euros is often the most efficient way to pay, as it avoids any potential "foreign transaction fees" your bank might charge for a non-GBP purchase while you are technically in international waters. In 2026, Brittany Ferries continues to encourage the use of contactless cards or euros to improve efficiency on their routes between the UK, France, Spain, and Ireland. If you pay in cash using euros, you will receive your change in euros; if you pay in sterling, your change will generally be given in sterling, allowing you to easily clear out your spare coins before reaching your destination.