Common tip amounts on a $100 pre-tax bill
15%: $15 tip → $115 before tax
18%: $18 tip → $118 before tax
20%: $20 tip → $120 before tax
22%: $22 tip → $122 before tax
25%: $25 tip → $125 before tax
18%: $18 tip → $118 before tax
20%: $20 tip → $120 before tax
22%: $22 tip → $122 before tax
25%: $25 tip → $125 before tax
What about tax?
If sales tax is 8%, the tax is another $8. With a 20% tip on the pre-tax bill, the total would be $128. If you tip on the after-tax amount, the tip becomes $21.60 and the total is $129.60.
Choosing a percentage
Customs vary, and tip amounts are your decision. Before adding gratuity, check whether your receipt includes a mandatory service charge or automatic gratuity.