If you feel your gracious guide did a sweet job, then by all means show them your savory appreciation by giving them a few extra bucks! Here on the island, gratuities are customarily 10% to 20% if you had a great experience. Guides are able to accept cash, Venmo or Zelle. You also have the option to include a gratuity at the time of purchase. One more thing: We’d love it if you would leave us a review on TripAdvisor!