The official currency of St. Lucia is the Eastern Caribbean Dollar (XCD), which has been pegged to the US Dollar at a stable rate of $1.00 USD to $2.70 XCD for decades. In 2026, the "best" currency depends on your spending habits. For local markets, small roadside stands, and local buses, having EC Dollars is essential to avoid poor exchange rates or being given change in a mix of currencies. However, the US Dollar is widely accepted in all major tourist areas, hotels, and upscale restaurants. Most prices in tourist zones are listed in both currencies. If you pay in USD, expect to receive change in EC Dollars. For the best value, travelers are advised to withdraw EC Dollars from local ATMs or use a credit card with no foreign transaction fees, as many businesses now use modern digital payment systems. If you bring cash, carrying small denominations of US Dollars (like $1s, $5s, and $10s) is highly convenient for tipping and small souvenir purchases without needing a full currency exchange.