How it works
Calculate sales tax on the pretax bill, then apply your chosen tip percentage to either the pretax or tax-inclusive amount. Divide the total equally among the people paying.
Inputs and units
| Input | Example value | What to enter |
|---|---|---|
| Bill before tax | $80.00 | Required unit: $. Use a non-negative value. |
| Sales tax rate | 8 % | Enter the percentage as a number: for 15%, enter 15. Use a non-negative value. Allowed range: 0–100. |
| Tip rate | 20 % | Enter the percentage as a number: for 15%, enter 15. Use a non-negative value. Allowed range: 0–100. |
| People splitting | 2 | Enter a numeric value. Use a whole number. Must be greater than zero. Allowed range: 1–100. |
| Calculate tip on | Pretax bill | Check the selected option before calculating. |
Worked example
Show example inputs and results
This example is generated by the same calculation engine using the starting values in the form. Your own inputs produce your own result.
- Bill before tax
- $80.00
- Sales tax rate
- 8 %
- Tip rate
- 20 %
- People splitting
- 2
- Calculate tip on
- Pretax bill
Complete example results
- Each person pays
- $51.20
- Total bill
- $102.40
- Tip
- $16.00
- Sales tax
- $6.40
Reading the result
Match the rate period to the payment period. Fees and taxes absent from the inputs are not added automatically; compare totals with the same cost coverage.
Settle the total, then split it
Calculate tax and tip once for the full bill before dividing. This avoids accidentally tipping each person on the full amount. Equal splitting assumes everyone agrees to share the entire bill equally.
Check the receipt before adding gratuity
An included gratuity or service charge should be considered before entering an additional tip. This tool does not read your receipt or decide how a service charge is distributed. The percentages below are examples you can replace.
Compare different scenarios
Inputs held constant: Bill before tax: 80 $ · Sales tax rate: 8 % · Tip rate: 20 % · Calculate tip on: Pretax bill.
| People splitting | Each person pays |
|---|---|
| 2 | $51.20 |
| 3 | $34.13 |
| 4 | $25.60 |
Questions and answers
Can I use the example values for my own calculation?
The example values illustrate the calculation. Replace every input with your own information, especially dates, rates and the selected operation.
Does the tool decide the correct tip?
No. You choose the percentage and tax basis. Check whether your bill already includes a service charge or gratuity to avoid adding it twice.
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Data version: 2026-10-08 · Methods & accuracy