Question 1

How much should I tip at a restaurant?

Accepted Answer

US restaurant tipping conventions: 10–12% — below average service. 15% — standard, acceptable service. 18% — good service. 20% — great service. 25%+ — exceptional service or celebration. For delivery: $3–$5 minimum or 10–15%. Bartenders: $1–2 per drink or 15–20%. Hairdressers: 15–20%. Taxi/rideshare: 15–20%. Always tip on the pre-tax amount, though most people tip on the total for convenience.

Question 2

How do I calculate a 20% tip quickly in my head?

Accepted Answer

Find 10% by moving the decimal left one place. Double it for 20%. Example: $47.50 bill. 10% = $4.75. 20% = $9.50. For 15%: find 10% then add half of that. $4.75 + $2.375 ≈ $7.13. For 18%: find 20% and subtract 10% of that. $9.50 − $0.95 = $8.55. These mental shortcuts work for any bill amount.

Question 3

Should I tip on the pre-tax or post-tax amount?

Accepted Answer

Convention in the US is to tip on the pre-tax subtotal, as the tax is not part of the service. However, since the difference is small (tax is 6–10%), many people simply tip on the total for convenience. On a $50 pre-tax bill with 8% tax ($4 tax), 20% tip on pre-tax = $10; on total = $10.80. The 80-cent difference rarely matters. Pick the convention you prefer and be consistent.

Question 4

How do I split a bill evenly among a group?

Accepted Answer

Add the tip to the total bill, then divide by the number of people. Example: $120 bill, 20% tip ($24), total $144. Split 4 ways: $144 / 4 = $36 per person. If people ordered different amounts, split proportionally: each person pays their share × (1 + tip rate). With $30 order at 20% tip: $30 × 1.20 = $36.

Question 5

What tip percentage did I leave if I know the tip amount?

Accepted Answer

Tip% = (Tip Amount / Bill) × 100. Example: $68 bill, $14 tip. Tip% = (14/68) × 100 = 20.6%. This is useful for checking if a service charge was automatically added (look at the receipt), or for calculating effective tip rate from a rounded total.

Question 6

Do I tip on alcohol and desserts at restaurants?

Accepted Answer

Yes — standard practice is to tip on the entire bill including alcohol and desserts. Some people tip less (15%) on large alcohol orders to avoid excessive tips. For open bars or bottle service, tip is typically negotiated separately (often $1–2 per drink, or a flat amount for the event). Servers benefit from tips on the full bill, as they spend equal effort serving drinks.

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