The Antillean Guilder or Florin is the official currency in St. Maarten, which is divided into 100 cents. US dollars are accepted at the majority of businesses on the Dutch side of the island. On the French side, the euro is the official currency.

St. Maarten is unique because the island is divided into two territories: the Dutch side (Sint Maarten) and the French side (Saint-Martin). On the Dutch side, the official currency is the Netherlands Antillean Guilder (ANG), though in early 2026, the new Caribbean Guilder (XCG) has begun circulating as its replacement. However, the US Dollar (USD) is accepted almost everywhere on the Dutch side. On the French side, the official currency is the Euro (€). Most businesses on the French side will accept US Dollars, but often at a poor exchange rate (sometimes 1:1, which favors the Euro). For travelers, carrying US Dollars is usually the most convenient option for the entire island, but using a "no-foreign-transaction-fee" credit card is the best way to ensure you get the most accurate daily exchange rate at larger establishments.