How much is a 20% tip on $86.40?

$16 on the pre-tax $80 — or $17.28 if you tip on the post-tax total. The pre-tax amount is the etiquette-correct base.

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

Pre-tax is the convention — the tip rewards service, not the tax. Suggested-tip screens often quietly use the post-tax total.

What is the standard tip percentage in the US?

15–20% at sit-down restaurants (18–20%+ for good service), 10–15% for delivery, $1–2 per drink at bars, 15–20% for taxis/rideshare.

How do you split a tip evenly?

Add the tip to the total, divide by the number of people. Each pays (bill + tip) ÷ people — this calculator does it in one step.

Tip Calculator — Split the Bill & Tip Per Person

Calculate the tip, the total, and what each person pays when splitting the bill — with tip-on-pre-tax done the right way.

Bill amount

Tip

Split between

Number of people sharing the bill.Sales tax on the bill

So the tip is calculated on the pre-tax amount, as etiquette suggests.

Tip amount

$14.40

Total with tip

$100.80

Each person pays

$33.60

split 3 ways

Pre-tax amount

$80.00

tip is based on this

Tip per person

$4.80

Last reviewed 2026-10-18. Rates change — verify against the official sources linked below before relying on these figures.

What this is based on

Tip is calculated on the pre-tax amount — the etiquette-standard base.
US norms: 15–20% for sit-down service, 18–20%+ for good service, 10–15% for delivery.

Tip on the pre-tax amount — that's the standard

Etiquette says the tip applies to the service, not the government's share — tip on the pre-tax bill. On an $86.40 check with 8% tax, the pre-tax amount is $80 — an 18% tip is $14.40, not $15.55. The difference is small per meal and adds up across hundreds of restaurant visits a year.

Most suggested-tip screens conveniently calculate on the post-tax total, and some now start suggestions at 22% — the check is not the authority; do your own math.

The mental-math version

10% is just a decimal shift — $86.40 → $8.64. From there: 15% is 10% plus half again ($8.64 + $4.32 ≈ $13), 20% is double ($17.28), 18% is '20% minus a bit'. Learn the 10%-shift and you never need the calculator again — but splitting three ways with different tax rates is exactly when you do.

Splitting the bill without the awkwardness

The clean approach for groups: decide the tip once (on pre-tax), add it to the total, divide evenly — or have one person pay and settle up via Venmo/Splitwise. If orders differed wildly, proportional splitting (each pays their share of pre-tax + proportional tip + proportional tax) is fairer than equal splits — and this calculator gives you the numbers either way.

Frequently asked questions

How much is a 20% tip on $86.40?: $16 on the pre-tax $80 — or $17.28 if you tip on the post-tax total. The pre-tax amount is the etiquette-correct base.
Should you tip on the pre- or post-tax amount?: Pre-tax is the convention — the tip rewards service, not the tax. Suggested-tip screens often quietly use the post-tax total.
What is the standard tip percentage in the US?: 15–20% at sit-down restaurants (18–20%+ for good service), 10–15% for delivery, $1–2 per drink at bars, 15–20% for taxis/rideshare.
How do you split a tip evenly?: Add the tip to the total, divide by the number of people. Each pays (bill + tip) ÷ people — this calculator does it in one step.

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