Yes, you can use your Visa card almost everywhere in Lisbon in 2026. Lisbon is a very card-friendly city, and the vast majority of restaurants, hotels, major shops, and tourist attractions accept international Visa and Mastercard credit and debit cards. Contactless payment (tap-to-pay) is the standard in Portugal, so you can often pay using your card, smartphone, or smartwatch even at small kiosks. However, there are a few "cash-only" holdouts to watch for: very small traditional "tascas" (local eateries), some market stalls, and older ticket machines for public transport might still require Euro coins or notes. Some small businesses may also have a "minimum spend" (often 5 or 10 Euros) for card transactions. It is also a "pro-tip" to always choose to pay in "Local Currency" (Euros) if the card terminal asks, rather than your home currency; this allows your own bank to handle the conversion, which is almost always cheaper than the "Dynamic Currency Conversion" offered by the merchant's machine.