Whether you’re en route on a two-week vacation or creating a budget for your next big trip, there’s one cost that’s commonly forgotten in the process: gratuity. Although you might’ve just spent hundreds or thousands of dollars booking your flight and accommodations, you’ll likely encounter staff throughout your vacation who merit a tip.

As you’re enjoying your relaxing getaway, consider expressing thanks to the people who’ve made your vacation an experience to remember. Here’s how to practice good tipping etiquette on your next trip.