Splitting a restaurant bill becomes confusing when tax, gratuity and different group sizes are involved. A consistent order of operations prevents rounding errors and makes the total easy to explain.
Use the free Tip Calculator while following the examples below.
Calculate the bill in the right order
Start with the subtotal, calculate tax, calculate the tip using your chosen method and then add every amount together.
Final total equals subtotal plus tax plus gratuity. Divide that result by the number of people for an equal split.
Example for a group of four
Assume a $120 subtotal, 8% tax and an 18% pre-tax tip. Tax is $9.60 and the tip is $21.60.
The final total is $151.20. Dividing by four gives $37.80 per person.
Handle rounding fairly
Round only after calculating the full total. Rounding each individual component too early can create a small difference.
If cash payment requires whole numbers, assign the rounding difference to one person or distribute it transparently.
Practical checklist
- Work from an accurate original value or source file.
- Review the selected settings before processing.
- Check the result instead of assuming it is correct.
- Keep the original until the new result has been verified.
Frequently asked questions
What if people ordered different amounts?
Calculate each person’s items and their share of tax and tip separately instead of using an equal split.
Should tax be split equally?
For an equal bill split, tax is normally included in the total before division.
Can the calculator use decimal tip rates?
Yes. Enter a custom rate such as 17.5% when required.
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Last reviewed: November 11, 2026.