Ireland's main currency is the Euro. Because most places you visit will be able to take your credit or debit cards, you don't need to take much cash. In fact, there is really no reason to get Euros before you leave the US.

In 2026, using a credit card is the superior and most convenient option for tourists traveling in Ireland. The country has embraced a "contactless-first" culture, and nearly every pub, restaurant, hotel, and boutique accepts "Tap-to-Pay" via cards, smartphones, or smartwatches. Major networks like Visa and Mastercard are accepted everywhere, though American Express and Discover are still not widely supported outside of major international hotel chains. While card is king, you should still carry a small amount of Euro cash (about €50–€100) as a backup for specific situations: tipping your tour guide, paying for small purchases at rural craft markets, or visiting traditional "old-school" pubs in remote parts of the Wild Atlantic Way that may occasionally have "cash-only" policies for small tabs. It is important to note that Ireland uses the Euro (€), while Northern Ireland uses the British Pound (£); if your trip crosses the border, your credit card will handle the currency conversion automatically, which is often much cheaper than visiting a physical currency exchange desk at the airport. For 2026, the best financial strategy is "Card for everything, cash for the small things."