18% Tip on $100 | Tip & Total
A 18% tip on $100 is $18.00, for a total of $118.00.
Group checks in the $100 area often trigger automatic gratuity — if not, $20.00 at 20% is the fair range for good service. 18% is the traditional sit-down default when the service was fine and the bill uncomplicated.
You can compare this 18% rate against 15%, 18%, 20%, and 25% in the table and calculator below.
Tip amounts on $100
| Tip % | Tip amount | Total with tip |
|---|---|---|
| 10% | $10.00 | $110.00 |
| 15% | $15.00 | $115.00 |
| 18% — your selection | $18.00 | $118.00 |
| 20% | $20.00 | $120.00 |
| 25% | $25.00 | $125.00 |
Watch out: tips calculated after tax
Many receipts print their suggested tip on the after-tax total. With a 9% sales tax, a 18% tip on $100 comes to $19.62 instead of the correct $18.00 — about $1.62 more, which is really 19.6% of your pre-tax bill.
On other percentages: 15% → $16.35, 18% → $19.62, 25% → $27.25.
Tip Calculator
Tip percent
Tip
$18.00
Total with tip
$118.00
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Reviewed by TipTruth TeamUpdated 2026-08-21