How does tipping actually work in different countries?
It varies enormously, and the variation is structural rather than cultural politeness — it depends on whether service staff are paid a full wage, which determines whether a tip is a bonus or a substantial part of someone's income.
The three broad models:
Tipping as wage substitution. In the United States and a few other markets, tipped staff may be paid a lower minimum wage on the expectation that tips make up the difference. Tipping is therefore effectively obligatory, and customary rates are high — commonly 15–20% or more in restaurants, with expectations extending to bars, taxis, hotel staff and delivery.
Tipping as modest appreciation. Much of Europe, where staff receive a full wage. Rounding up or leaving around 5–10% for good service is normal, and not tipping is not scandalous. Service charges may already be included, and paying twice is common among visitors.
Tipping as unnecessary or unwelcome. Japan is the clearest example, where tipping is not customary and can cause confusion or discomfort; South Korea is similar. Service is included in the price as a matter of course.
What actually confuses travellers:
Service charges added automatically, which may or may not go to staff — and in several countries there are now rules requiring that they do.
Card machines prompting for a tip at the point of payment, including in contexts where tipping was never customary — a genuine expansion driven by payment technology rather than by custom.
Cover charges and bread charges in some countries, which are not tips.
Tipping in hotels, which follows different conventions again — housekeeping, porters and concierge each have their own norms.
Taxis and rideshare, where app prompts have shifted expectations.
Practical approach:
Check the bill for an included service charge before adding anything.
Ask a local or the accommodation, which is more reliable than a blog.
Cash to the person is more likely to reach them than a card tip in some countries.
Do not over-tip as a foreigner, which distorts local norms and is a recognised complaint.