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

Convention in the US is to tip on the pre-tax subtotal, since the tax is not part of the service. Tipping on the post-tax total is simply more generous and nobody will object. This calculator uses the pre-tax base and shows the post-tax figure alongside so you can choose.

How much should I tip in the US?

For sit-down restaurant service, 18 to 20 percent is the current norm, with 15 percent read as below standard. Counter service and takeaway carry no firm expectation. Bartenders are usually tipped a dollar or two per drink, and delivery drivers commonly 15 to 20 percent with a few dollars as a minimum.

Do tipping norms differ outside the US?

Considerably. Much of Europe includes service in the price and rounding up is sufficient. Japan generally does not tip at all and it can be read as impolite. Australia and New Zealand treat it as optional for exceptional service. American percentages are unusually high by international standards.

What if service was genuinely poor?

A reduced tip is a reasonable signal, though in the US many servers are paid a sub-minimum base wage on the assumption tips make up the difference. If the problem was the kitchen or the wait for a table rather than the server, speaking to a manager is more likely to fix anything than a lower tip.

How should we split a bill when people ordered very differently?

An even split is fastest and fine when orders were broadly similar. When one person had a steak and another had a salad, splitting by item and applying the same tip percentage to each share is fairer. Adjust the number of people here to model either approach.

Is a service charge the same as a tip?

No. An automatic service charge, common for large groups, is a mandatory addition to the bill and is often distributed differently from voluntary tips. If one has already been applied, an additional tip is optional — check the bill before tipping twice.

Tip Calculator: Split the Bill Any Way

How to use this calculator

Enter the bill before tax — the subtotal, not the final line.
Choose your tip percentage.
Enter how many people are splitting it.
Enter the sales tax rate so the total matches the bill you were handed.

The headline figure is what each person actually owes.

How the calculation works

tax        = bill × tax rate
tip        = bill × tip rate
total      = bill + tax + tip
per person = total / people

The important detail is that the tip is calculated on the pre-tax bill. Tax is a government charge, not part of the service, so US convention excludes it from the tip base. Tipping on the post-tax total is not wrong — it is simply more generous — and the calculator shows that figure alongside so the choice is yours rather than accidental.

A worked example

An $86 dinner bill before tax, tipping 20%, split 4 ways, with 8.25% sales tax.

tax = 86 × 0.0825 = 7.10
tip = 86 × 0.20   = 17.20
total = 86 + 7.10 + 17.20 = 110.30
per person = 110.30 / 4 = 27.57


Bill	$86.00
Tax	$7.10
Tip (20% of pre-tax)	$17.20
Total	$110.30
Each person pays	$27.57

Had you tipped 20 percent on the post-tax figure of $93.10 instead, the tip would be $18.62 — $1.42 more. Over a year of eating out that is a meaningful sum, and it is entirely a matter of preference which base you use.

How much to tip

US norms, as they currently stand:

Situation	Customary
Sit-down restaurant	18–20%
Bar	$1–2 per drink, or 15–20%
Food delivery	15–20%, with a $3–5 minimum
Coffee shop / counter service	Optional
Taxi or rideshare	10–15%
Hairdresser	15–20%

Fifteen percent, once standard, now reads as below expectation in most sit-down restaurants.

Outside the US the picture is entirely different. Much of Europe includes service in the price and rounding up suffices. Japan generally does not tip at all, and attempting to can cause awkwardness. Australia and New Zealand treat it as optional for exceptional service. American percentages are unusually high by international standards, and applying them abroad is not the safe default it might seem.

Common mistakes to avoid

Tipping on a total that already includes a service charge. Large groups are frequently subject to an automatic gratuity of 18 to 20 percent. It is easy to miss on a long bill and add a second tip on top. Read the itemised lines before signing.

Splitting evenly when orders were wildly different. An even split is fast and fair enough when everyone ate similarly. When one person had a steak and two bottles of wine while another had soup, splitting by item and applying the same tip percentage to each share is fairer. The arithmetic is trivial; the awkwardness is the real obstacle.

Assuming the card machine’s suggested percentages are calculated on the subtotal. Many terminals compute their suggested tips on the post-tax total, quietly inflating each option. Some now suggest 25, 30 and 35 percent as the three presets.

Penalising the server for the kitchen. A slow kitchen, a bad table or a long wait to be seated are usually not the server’s doing. In the US many servers are paid a sub-minimum base wage on the explicit assumption that tips make up the difference, so a reduced tip is a blunt instrument. Speaking to a manager is more likely to fix anything.

Forgetting the cash option. Tips left in cash generally reach the server faster and in full, whereas card tips may be pooled, processed with a delay, or subject to card fees depending on the establishment.

On tipping culture

It is worth acknowledging that the system is contested. Tipping in the US shifts a substantial part of wage responsibility from employer to customer, produces inconsistent earnings, and has a documented history of bias in who receives more. Several restaurants have experimented with service-included pricing, with mixed commercial results. None of that changes what a server takes home tonight, which is why the practical advice above assumes the system as it is.

When this calculator is not the right tool

For splitting a bill by what each person ordered rather than evenly, work out each share first and run each through separately. For sales tax on its own, in either direction, use the sales tax calculator. And for the underlying percentage arithmetic, the percentage calculator answers all three variants at once.

Tip Calculator