Tipping norms differ enough by region that a habit formed in one country can be either wasteful or awkward in another. This is a general orientation, not a definitive rulebook — local norms shift and vary by establishment.
Regions where tipping is expected and significant
In the United States and, to a lesser extent, Canada, tipping in the 15–20% range at sit-down restaurants is a genuine expectation tied to how service staff are paid, not an optional bonus — budget for this as part of the meal cost, not an extra.
Regions where tipping is modest or rounding-based
Much of Europe and Latin America treats tipping as a smaller, rounding-up gesture — leaving a small amount or rounding the bill up is appreciated but not a fixed percentage expectation the way it is in North America.
Regions where tipping can be unexpected or even declined
In Japan and parts of East Asia, tipping is not customary and can occasionally cause confusion or be politely declined, since excellent service is considered simply the standard, not something extra to reward.
Takeaway: When genuinely unsure, ask your accommodation host or a local friend rather than defaulting to your home country's norm — it takes one question and avoids both overpaying and unintentional rudeness.