Private island stays in the Sea of Cortez or near Quintana Roo require an FMM (Forma Migratoria Múltiple), usually granted for 180 days. Short-term r... Read Moreentals are subject to 16% VAT and a 3–5% Lodging Tax. Access typically requires a private boat charter; travelers should confirm if the island has a deep-water dock. In protected marine parks, eco-regulations may limit motorized water sports or require specific permits for diving and fishing around the island. Read Less