Tipping is appreciated, but not universal
Vietnam does not operate on the same mandatory tipping logic travelers may know from some other markets.
Tips are generally a gesture for good service rather than a baseline expectation, especially in local everyday settings.
Guides and drivers are the clearest cases
Private guides, drivers and hands-on service teams are the contexts where tips feel most natural if the service was genuinely helpful.
Keep the gesture proportional and simple instead of overthinking a rigid formula.