How to Split a Restaurant Bill With Tax and Tip
Published 2026-01-20 · Updated 2026-07-14
Splitting a restaurant bill gets confusing when tax, tip, shared items, and different payment apps are involved. The cleanest method is to calculate the full total first, then divide it by the number of people, unless the group wants an item-by-item split.
Simple bill split formula
Use this formula: each person pays = (subtotal + tax + tip) / number of people.
If the tip is based on the subtotal, calculate tip first, then add it to tax and subtotal. Some people tip on the post-tax total, but pre-tax tipping is common in the United States.
Example with tax and tip
Suppose the subtotal is $80, tax is $8, and the group chooses a 20% tip. The tip is $16, so the total bill is $104. Split between four people, each person pays $26.
If one person pays the full check, everyone else can send their $26 share through a payment app. Rounding to the nearest dollar is often easier for casual meals.
When equal splitting is not fair
Equal splitting works best when everyone ordered roughly similar amounts. If one person only had a small appetizer while others ordered drinks and entrees, an itemized split may be better.
Also check the receipt for automatic gratuity. Many restaurants add a service charge for larger parties, and adding another full tip by mistake can make the bill much higher.
Quick Summary
Add subtotal, tax, and tip first, then divide by the group size. Use an itemized split when orders are very different.