Both are common, and it is largely a matter of preference. Tipping on the pre-tax amount is slightly more traditional, since the tip rewards service rather than the government's tax, and it results in a modestly smaller tip. Tipping on the post-tax total is simpler because you can apply the percentage to the final bill, and it gives a bit more to the server. The difference is usually small. This calculator lets you choose either basis so the tip matches your preference. For larger bills the choice matters a little more, so pick whichever feels fair to you.
Tip Calculator
Calculate the tip and split the bill fairly among any number of people.
Reviewed by the Smart Finance Calculators Editorial TeamLast reviewed:
Enter your details
Values update automatically. Currency: USD.
Results
- Tip amount
- $14.40
- Tax
- $6.40
- Total bill
- $100.80
- Tip per person
- $7.20
- Total per person
- $50.40
What the Tip calculator does
A tip calculator quickly works out a gratuity and splits the total bill evenly across your group. It removes the awkward mental math at the table and lets you choose whether to tip on the pre-tax or post-tax amount.
How the calculation works
The tip is a percentage of either the pre-tax bill or the after-tax total, depending on your preference. The tip and tax are added to the bill, and the result is divided by the number of people.
Formula
Tip = Tip base × tip %. Total = Bill + Tax + Tip. Per person = Total ÷ Number of people.
What your results mean
An $80 bill with 8% tax and an 18% tip on the pre-tax amount adds $14.40 tip and $6.40 tax, totaling $100.80 — about $50.40 each for two people.
Limitations: Tipping norms vary by country and service type. In some places a service charge is already included.
Frequently asked questions
For sit-down restaurant service in the US, 15% to 20% of the bill is customary, with 18% to 20% common for good service and more for exceptional service. Norms differ by service type: many people tip a dollar or two per drink at a bar, round up for coffee or counter service, and tip delivery drivers around 10% to 20% or a few dollars minimum. Tipping customs vary widely between countries, and in some places service is already included. This calculator offers a percentage you can set, so adjust it to the situation and your local norms.
This calculator divides the total evenly across the number of people you enter, which works when everyone shared roughly equally. For an uneven split, first figure out each person's share of the pre-tax bill based on what they ordered, then apply the same tip and tax percentages to each share proportionally. Alternatively, calculate the group's total tip and tax here, then divide those in proportion to each person's food cost. For very complex splits, itemizing each order and adding a proportional share of tax and tip is the fairest approach.
For delivery, tipping is customary because a driver is providing a service, typically around 10% to 20% of the order or a few dollars minimum, and more in bad weather or for large or distant orders. Note that a delivery fee usually goes to the restaurant or platform, not the driver, so it is not a substitute for a tip. For takeout you pick up yourself, tipping is optional; many people leave a small amount if staff prepared a large or complex order, but it is less expected than for table service. Use this calculator to set whatever percentage fits.
Not usually. Some restaurants, especially for large groups, add an automatic service charge or gratuity to the bill, and in that case an additional tip is generally not expected, though you may add a little more for outstanding service. Always read the itemized bill, since a service charge can be easy to miss and you could end up tipping twice. In some countries service is routinely included by law or custom. This calculator does not detect included service charges, so if one is already on your bill, set the tip percentage to zero or a small top-up.
The rounding option rounds your total bill up to the nearest whole unit of currency, which is handy for leaving a tidy amount or making cash payment easier. When you enable it, the calculator increases the total to the next whole number and adjusts the tip so the tip plus the fixed bill and tax add up to that rounded figure. This means your effective tip percentage may be slightly higher than the rate you chose. If you prefer an exact percentage tip, leave rounding off. Rounding is purely for convenience and never reduces the bill or tax.
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Financial disclaimer: Results are estimates for educational purposes only and are not professional financial, tax, legal or investment advice. Figures may not reflect your exact situation. Consult a qualified professional before making financial decisions.