Tipping housekeeping services in Vietnam is a cultural nuance. A satisfactory daily service typically merits rounding up 10% of the daily rate, which is around ₫20,000 – 50,000 ($0.8 – 2). For exceptional cleaning or additional services, consider an extra 5-10% tip. Always respect staff preferences and expectations when offering gratuities, and don't be surprised if they decline your offer if not satisfied. A thoughtful smile and kind words can often replace a physical tip in showing appreciation for their hard work.