💰 Tip Calculator
A tip calculator that works on the pre-tax or post-tax amount and shows what the choice costs, splits any number of ways, or works back from a round total.
Each of 2 people
- Bill as printed
- $85.50
- Of which sales tax at 8.25%
- $6.52
- Food and drink before tax
- $78.98
- 18% tip on the pre-tax amount
- $14.22
- Total
- $99.72
- Split 2 ways
- $49.86
- Rounded up to $50.00 each
- $100.00 total, a 18.4% tip
Tipping on the full bill instead would make the tip $15.39 — a difference of $1.17. At 8.25% tax the choice costs about 8.2% of the tip.
What Tip Calculator Does
Tipping arithmetic is trivial and Google now prints it above the results, so the only question left worth a calculator is the one the top-ranked page raises and then declines to answer: do you tip on the bill before tax or after it?
Convention says before. The tip is for the service, and sales tax is not part of the service. What nobody states is how much the choice actually costs, and it turns out to be exactly the tax rate. An 8.25% sales tax makes a post-tax tip 8.25% larger than a pre-tax one — not 8.25 percentage points, 8.25% of the tip. On an $85.50 bill at 18%, that is $14.22 against $15.39. The difference is $1.17, and it is the same proportion at every tip percentage.
The second thing that happens at a real table is rounding. Nobody hands over $49.86. They round to $50, which quietly changes the tip percentage, and this calculator shows what that rounded figure works out to so you can decide whether it is generous or stingy before you commit.
And the third is working backwards. Most people do not pick a percentage — they pick a round number and let the percentage fall where it falls. The second mode does that: enter the total you want to pay and it tells you the tip and the percentage it implies.
How to Use Tip Calculator
- Enter the bill as printed, including any sales tax already on it
- Enter your local sales tax rate so the pre-tax and post-tax tips can be compared
- Pick a tip percentage, or switch to "Hit a round total" and enter the amount you want to hand over
- Set the number of people; the result shows the exact split and the rounded-up split side by side
Formula Used by Tip Calculator
The tip itself
tip = base × percent ÷ 100 · base = pre-tax or post-tax
- base
- The food and drink total, before or after sales tax — the only real decision here
- percent
- 15–20% is the US restaurant range
Worked example
An $85.50 bill including 8.25% sales tax, tipped at 18%
- Back the tax out: 85.50 ÷ 1.0825 = 78.98
- Pre-tax tip: 78.98 × 0.18 = 14.22
- Post-tax tip: 85.50 × 0.18 = 15.39
Result: $14.22 or $15.39 — the total comes to $99.72 or $100.89
What the pre-tax choice costs — an exact identity
post-tax tip ÷ pre-tax tip = 1 + tax rate
- Why
- Both tips are the same percentage of two bases that differ by exactly the tax
- Consequence
- The tip percentage cancels out, so the gap is the tax rate and nothing else
Worked example
A $100 pre-tax meal at 18%, under different tax rates
- At 6% tax: $18.00 pre-tax against $19.08 post-tax
- At 7%: $18.00 against $19.26
- At 10%: $18.00 against $19.80
Result: Each gap is exactly the tax rate — 6%, 7% and 10% of the tip
Splitting, and what rounding up really tips
per person = total ÷ people, then round up and check the implied percentage
- Rounding up
- What everyone actually does when settling in cash
- Implied percent
- (rounded total − bill) ÷ tip base × 100
Worked example
The $85.50 bill with an 18% pre-tax tip, split two ways
- Total: 85.50 + 14.22 = 99.72
- Each: 49.86
- Rounded up: $50 each, $100 total
Result: A $14.50 tip, which is 18.36% — rounding added 36 basis points
Doing it in your head
10% = move the decimal one place left. 20% = double it. 15% = 10% plus half of it.
- Why it works
- Every common tip percentage is a small multiple of 10%
Worked example
A bill of $120.80
- 10%: $12.08
- 20%: 12.08 × 2 = $24.16
- 15%: 12.08 + 6.04 = $18.12
Result: No calculator needed, and accurate to the cent
Tip chart — the amounts, not the percentages
Straight percentage of the amount shown. Use the pre-tax figure from your receipt if you tip on the food total.
| Bill | 15% | 18% | 20% | 25% |
|---|---|---|---|---|
| $20 | $3.00 | $3.60 | $4.00 | $5.00 |
| $30 | $4.50 | $5.40 | $6.00 | $7.50 |
| $40 | $6.00 | $7.20 | $8.00 | $10.00 |
| $50 | $7.50 | $9.00 | $10.00 | $12.50 |
| $60 | $9.00 | $10.80 | $12.00 | $15.00 |
| $75 | $11.25 | $13.50 | $15.00 | $18.75 |
| $100 | $15.00 | $18.00 | $20.00 | $25.00 |
| $125 | $18.75 | $22.50 | $25.00 | $31.25 |
| $150 | $22.50 | $27.00 | $30.00 | $37.50 |
| $200 | $30.00 | $36.00 | $40.00 | $50.00 |
What tipping post-tax actually costs
A $100 pre-tax meal tipped at 18%. The gap is always the sales tax rate as a percentage of the tip — the tip percentage cancels out entirely.
| Sales tax | Bill as printed | Tip pre-tax | Tip post-tax | Extra |
|---|---|---|---|---|
| 4.00% | $104.00 | $18.00 | $18.72 | $0.72 |
| 6.00% | $106.00 | $18.00 | $19.08 | $1.08 |
| 7.00% | $107.00 | $18.00 | $19.26 | $1.26 |
| 9.00% | $109.00 | $18.00 | $19.62 | $1.62 |
| 10.00% | $110.00 | $18.00 | $19.80 | $1.80 |
Customary tips by service in the US and Canada
Ranges rather than rules, and they move over time. Where a service charge is already on the bill, that is the tip.
| Service | Typical |
|---|---|
| Restaurant server, bartender | 15–20% |
| Food delivery | 15–20%, more for distance or bad weather |
| Hairstylist, barber, nail technician | 10–20% |
| Massage therapist | 10–20% |
| Taxi or car service | 15–20% |
| Hotel housekeeping | Not required; $1–$2 per person per night is common |
| Hotel room service | Usually already charged; if not, 15–20% |
| Shuttle driver, parking attendant | $1–$3 |
| Tour guide | $1–$5 depending on length |
| Movers, appliance delivery, home services | Not expected; $5–$20 each if you do |
Source: Calculator.net — Tip Calculator, typical tip amounts table
Federal wage rules behind US tipping
Why the tip is not really optional in the United States. Many states set higher floors than these federal minimums, and several require the full state minimum wage before tips.
| Figure | Amount | What it means |
|---|---|---|
| Federal minimum wage | $7.25/hour | The combined floor a tipped worker must reach |
| Minimum cash wage | $2.13/hour | What the employer itself must pay |
| Maximum tip credit | $5.12/hour | How much of your tip can count toward the employer’s obligation |
| Tipped employee threshold | More than $30/month | Above this in tips, the tip-credit rules can apply |
Source: US Department of Labor, Wage and Hour Division — Minimum Wages for Tipped Employees
How to Read Your Result
The pre-tax question, settled with arithmetic
Etiquette guidance and the leading calculators agree the tip is conventionally figured before tax, and the reasoning is straightforward: the tax is not part of the service. What makes the debate go in circles is that nobody quantifies it. The answer is a clean identity — because both tips are the same percentage of two bases separated by the tax, the tip percentage cancels and the gap is exactly the tax rate. Tipping post-tax in a 6% state means tipping 6% more; in a 10% city, 10% more. On a typical dinner that is a dollar or two, which is why most people reasonably stop worrying about it.
Rounding is a tip decision, not a neutral one
Rounding a $49.86 share up to $50 looks like tidiness and is really a small extra tip. Usually that is fine and occasionally it is not: rounding down to $49 on the same bill drops the effective tip below 17%. The direction matters more on small bills, where a single dollar can move the percentage by several points. Seeing the implied percentage next to the rounded figure is the whole point — round up freely on a $200 dinner, think twice on a $12 coffee.
Automatic gratuity is the tip
Parties above six or eight are often charged a service fee of 18% to 20% automatically, and it will be a line on the bill rather than a suggestion on the terminal. That is the tip, already collected. Tipping again on top is voluntary and normally reserved for genuinely exceptional service. It is worth reading the bill before the payment screen offers you a further 20% on a total that already includes gratuity — a compounding that catches people out constantly.
Why the US is different
Federal law permits a cash wage of $2.13 an hour for tipped employees, with up to $5.12 of tips credited toward the $7.25 minimum. Anyone receiving more than $30 a month in tips can be paid that way. Employers are required to make up any shortfall, but the practical effect is that tips are wages rather than a bonus, which is why undertipping in the US carries weight it does not carry elsewhere. Several states have abolished the tip credit and require the full state minimum before tips, so the picture varies considerably by where you are standing.
Tipping abroad is a different question entirely
The 15–20% norm is close to a US-and-Canada phenomenon. Much of Europe expects rounding up or 5–10%, often only for table service and often only in cash. Japan does not tip at all and an offered tip may be politely declined; a small gift is the closer equivalent. Several countries add a service charge by default, so an additional tip is genuinely double-paying. The tip percentage is the least transferable part of this calculator — check local practice before assuming the number in your head applies.
Terminal prompts have shifted the defaults
Payment screens now suggest tips in places that never expected them, and the suggested percentages have climbed, often calculated on the post-tax total by default. Neither the setting nor the number is a rule. The percentages in the table above are what the service has customarily commanded, and a screen suggesting 25% for a counter-service coffee is an interface decision by the vendor, not a change in convention.
Limitations & Accuracy Notes
- Tipping customs are social conventions that vary by country, city, venue and year. The ranges here describe common US and Canadian practice at the time of writing and are not rules.
- The calculator assumes the bill you enter already includes any sales tax, and backs the tax out at the rate you supply. If your receipt shows tax as a separate line, enter the grand total.
- Sales tax in the US varies by state, county and often city, and some jurisdictions tax prepared food at a different rate from other goods. Use the rate on your own receipt rather than a state average.
- Service charges, automatic gratuities and delivery fees are not detected. If one is on your bill, it is already the tip — set the tip percentage to zero and split the total.
- Splitting divides the total evenly. Splitting by what each person ordered is a different calculation, and the fair version of it also apportions tax and tip in proportion to each share.
- The federal wage figures are the national floor. Many states set higher minimum cash wages for tipped employees, and some require the full minimum wage before tips.
Frequently Asked Questions
Should I tip before or after tax?
How much should I tip at a restaurant?
How do I calculate a tip in my head?
Why do servers rely on tips in the US?
How do I split a bill that will not divide evenly?
What if a service charge is already on the bill?
References & Further Reading
- US Department of Labor — Minimum Wages for Tipped Employees — Federal cash wage of $2.13, maximum tip credit of $5.12 against the $7.25 minimum, and the $30-per-month tipped-employee threshold, plus the state-by-state table
- Calculator.net — Tip Calculator — The most complete competing treatment, including the world map of tipping norms and the customary-amounts table by service reproduced above
- Omni Calculator — Tip Calculator — Source of the mental-arithmetic method; its worked examples on $120.80 and $66.40 were reproduced exactly to verify the shortcuts quoted here