How this calculator works
Enter your bill amount, tip percentage, and how many people are splitting it. Optionally, turn on “round up” to bump the total to the next whole dollar, with the extra automatically added to the tip.
The formula
tip = billAmount × tipPercent / 100 total = billAmount + tip (or, if rounding up: ceil(billAmount + tip) to the next dollar) perPerson = total / numPeople
Worked example
A $50 bill, 18% tip, split 4 ways:
- Tip: $50 × 18% = $9.00
- Total: $50 + $9 = $59.00
- Per person: $59 ÷ 4 = $14.75
Frequently asked questions (FAQ)
What's a standard tip percentage?
In the US, 15-20% is the most common range for restaurant service, with 20% increasingly seen as the default for good service. Some people tip more for exceptional service or less for counter/takeout service; there's no universal rule, just local convention.
How do I split a bill evenly with tax already included?
Enter the total bill amount (including tax) as the bill amount, then calculate your tip on that total. Most people tip on the post-tax total for simplicity, even though tipping on the pre-tax amount is technically more common etiquette.
Should I tip on the pre-tax or post-tax amount?
Tipping on the pre-tax subtotal is the more traditional etiquette recommendation, since sales tax isn't part of the value of the service. In practice, many people just tip on the total shown at the bottom of the receipt for simplicity; either is broadly acceptable.
What does the round-up option do?
It rounds your total bill-plus-tip up to the next whole dollar, then adjusts your tip amount up slightly to make that happen. Useful if you're paying cash and want a round number, or just want to tip a little extra without doing more math.
Are tips taxed the same way as regular wages?
Tips are taxable income, generally subject to the same federal income tax and FICA withholding as wages. For 2025-2028, a new federal deduction lets many tipped workers deduct a portion of reported tips from taxable income: see our No Tax on Tips calculator for details.
Sources
This is standard arithmetic; no external source is needed. See our No Tax on Tips calculator for how tips are actually taxed.