How to Calculate a Tip (Rates & Splitting the Bill)
The tip formula
Total = Bill + Tip · Per person = Total ÷ Guests
Mental math shortcuts
- 10% = move the decimal one place left ($84 → $8.40)
- 15% = 10% + half of 10% ($8.40 + $4.20 = $12.60)
- 20% = 10% × 2 ($8.40 × 2 = $16.80)
Typical tipping ranges by service (US norms)
| Service | Typical tip |
|---|---|
| Table service restaurant | 15–20% |
| Food delivery | 10–15% or flat minimum |
| Barista / counter service | Optional, often change or 10% |
| Taxi / rideshare | 10–15% |
| Hairdresser | 15–20% |
| Hotel housekeeping | $2–5 per night |
Outside the US, expectations differ widely: Japan often expects no tip, much of Europe rounds up or adds 5–10%, and service charges may already appear on the bill. Local norms beat any formula.
Worked example: splitting dinner
Bill $124.50, tax included, 4 friends, 18% tip on pre-tax subtotal of $115.
Tip = 115 × 0.18 = $20.70 → Total = $145.20 → Per person = $36.30
Common mistakes
- Tip% applied after already generous rounding on the total.
- Double-tipping when a service charge is already on the bill — read the receipt.
- Forgetting per-person fairness when orders differ wildly — split orders first, then tip.
Splitting a bill fairly (worked example)
Dinner for five comes to $184.65 pre-tax. At 18% the tip is $33.24, making the total $217.89 — $43.58 per person if everyone splits evenly. Two fairer options when orders differ: (1) each person tips on their own subtotal before splitting anything; (2) split food evenly, then divide drinks by actual consumption. Round per-person amounts up to the nearest dollar and the table usually lands within a few dollars of exact — cover the gap yourselves rather than shorting the tip.
Worked example: Bill Split & Tip at its default inputs
A worked example is only useful if you can reproduce it. The defaults on Bill Split & Tip give exactly the figures in this section, with no rounding done by us.
| Input | Default |
|---|---|
| Bill Amount | 120 |
| Tip (%) | 18 |
| Number of People | 4 |
Result: Per person: $35.40
The steps behind that answer
- Step 1: Tip = $120 × 18% = $21.60
- Step 2: Total = $120 + $21.60 = $141.60
- Step 3: Per person = $141.60 / 4 = $35.40
Bill Amount: half, as given, and half again
Hold every other field still and move only bill amount.
| Bill Amount | Result |
|---|---|
| 60 | Per person: $17.70 |
| 120 | Per person: $35.40 |
| 180 | Per person: $53.10 |
Halve bill amount and the result moves one way; add half again and it moves the other. Watching that gap is quicker than guessing which field matters most.
Related guides
Tip on the subtotal or on the total?
US tipping convention applies the percentage to the pre-tax subtotal, because the tip rewards service rather than the tax authority. Applying it after tax adds a few percent of tax to the tip: harmless in practice, but it is not what the norms describe, and on a large table it is a visible difference.
Outside the US the whole question is different. In much of Europe a service charge is already inside the menu price and an extra tip is optional rounding; in many parts of Asia and the Gulf, tipping is discretionary and sometimes not expected at all. Applying US percentages everywhere overpays in some countries and under-reads local custom in others.
Service charge, cover charge and the bill you actually get
A service charge on the bill is usually distributed to staff, so tipping on top of it means paying twice for the same service. Check whether the line says service charge or discretionary service charge: the first is normally pooled, the second can be removed on request.
Card terminals often present tip percentages calculated on the post-tax total, sometimes starting at 25%. Nothing forces you to accept the suggested number, but it is worth knowing that the default is set by the terminal, not by the restaurant.
Splitting a bill fairly
Equal splits are fast and usually fine among friends with similar orders. They stop being fair when one person had a starter, two drinks and a dessert while another had a main and water: the difference can easily be a third of the bill.
The workable compromise is to split the shared items evenly and each person's own items individually, then apply the tip and tax proportionally to what each person ordered. That is arithmetic nobody wants to do at the table, which is exactly what a bill-splitting calculator is for.
Tipping when something went wrong
A bad kitchen and a bad server are different problems. Slow food that the server warned you about is not a service failure; being ignored for forty minutes is. Tipping communicates service, so a reduced tip with a quiet explanation reaches the right person, while stiffing the server over the kitchen reaches the wrong one.
If the bill itself is wrong, fix the bill first. Percentages calculated on a disputed total compound the error, and a corrected invoice is a much easier conversation than a corrected tip.
FAQ
Tip on pre-tax or total?
Convention is pre-tax. The difference is small but real, and servers generally expect the pre-tax basis.
Is tipping expected in Pakistan, India and the UAE?
Modest tipping is appreciated but not obligatory in Pakistan and India; UAE restaurants often add a service charge where a small extra cash tip is still customary. Follow the bill's service-charge line first.
Do I tip on discounted meals?
Etiquette guides suggest tipping on the pre-discount value — the server did the same work regardless of the coupon.
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