Tipping is a customary practice in the United States and many other countries where service workers depend on gratuities as a significant portion of their income. Knowing how much to tip and when to adjust the amount ensures you acknowledge good service appropriately while staying within your budget. The general guideline for sit-down restaurants in the U.S. is 15% to 20% of the pre-tax bill, with 20% becoming the modern standard for satisfactory service. For outstanding service, many diners leave 25% or more.

Service Quality Guidelines

The quality of service you receive should directly influence the tip you leave. For below-average service where the server was slow or inattentive, a 10% to 15% tip is still considered appropriate in most situations. Standard, satisfactory service typically warrants 15% to 18%. Good to excellent service, where your server was friendly, prompt, and attentive to details, deserves 20% or higher. Keep in mind that tipping below 10% is generally reserved for genuinely poor experiences, and you should consider speaking with a manager before leaving an unusually low gratuity.

Tipping by Service Type

Different service industries follow different tipping conventions. At full-service restaurants, the standard is 15% to 20% of the pre-tax bill. Bartenders typically receive $1 to $2 per drink for simple orders or 15% to 20% of a larger tab. Food delivery drivers should receive 15% to 20%, with a minimum of $3 to $5, especially for orders placed during bad weather or late at night. Hair stylists and barbers customarily receive 15% to 25% of the service cost, while spa therapists usually receive 15% to 20%. Hotel housekeeping staff should receive $2 to $5 per night, left daily rather than at checkout since different staff may clean your room each day. Valet attendants typically receive $2 to $5 when your car is returned.

Pre-Tax vs. After-Tax Tipping

Etiquette experts generally recommend calculating your tip based on the pre-tax subtotal of your bill. Since sales tax varies by state and municipality, tipping on the after-tax total can inflate the gratuity by several percentage points, especially in high-tax areas. That said, many people choose to tip on the total amount for simplicity, and servers appreciate the gesture regardless. If your bill is $100 with $8.50 in tax, a 20% tip on the pre-tax amount is $20.00, while the same percentage on the after-tax total comes to $21.70. The difference is modest, and either approach is considered polite.

Group Tipping

When dining with a large group, many restaurants automatically add an 18% to 20% gratuity to the bill, typically for parties of six or more. Always check your bill before leaving an additional tip to avoid double-tipping. If the automatic gratuity is not applied and you are splitting the bill, make sure each person accounts for their share of the tip. A common pitfall is that each person tips only on their individual items, which can leave the server short if someone forgets or undertips. Using a tip calculator to split both the bill and the tip evenly can prevent this issue and keep the process fair for everyone at the table.

Use the following reference table to determine an appropriate tip for common service situations. These ranges reflect widely accepted U.S. tipping norms.

Calculating a tip is straightforward: multiply the bill amount by the tip percentage expressed as a decimal. The formula is Tip = Bill Amount x (Tip Percentage / 100). Here are three worked examples covering common scenarios.

Example 1: Restaurant Dinner

Example 2: Split Bill Among Friends

Example 3: Delivery Order