Expected social normHigh confidence
Explanation
In the United States, tipping at restaurants is a deeply ingrained social custom, not optional; it is how service staff earn their primary income because federal law allows a sub-minimum wage for tipped workers. Failing to tip 15-20% of the pre-tax bill is widely considered rude and a breach of etiquette.
Varies locally: Tipping norms are nearly uniform across the U.S., though in very rural areas or at some fast-casual chains, a lower tip (10-15%) may be accepted, but 15% remains the baseline.
Local Tip
Always tip 15-20% of the pre-tax total for sit-down service, and never leave a zero tip even for poor service—instead, speak to a manager.
How it compares elsewhere
Japan
Tipping is seen as insulting; excellent service is expected without extra payment.
France
A service charge is included, but leaving small change (5-10%) is appreciated for good service.
South Korea
Tipping is not customary and can be awkward; high-end restaurants may include a service charge.
AI-generated guidance — customs evolve and vary between people. Treat as a helpful starting point, not absolute rules.