Tipping is a big part of the culture in Vietnam. Although it’s not mandatory, it is increasingly expected – especially from foreign tourists. If you’re travelling from Hue to Hoi An by private car, taxi, or as part of a guided tour, it would be customary to leave your driver and/or guide a small tip (50K–100K VND) – provided you are happy with the service. It’s not necessary to tip on buses, the shuttle, or when using Grab (although Grab drivers do appreciate it if you round the fare up to the nearest 10K VND).