How to split a restaurant bill fairly
Pay for what you ordered. Share what you shared. Let tax and tip follow the food. That's the whole method; the rest of this page shows why it works and where the even split goes wrong.
The three rules
- Everyone pays for their own items. The steak is on the person who ate the steak.
- Shared items are divided among the people who shared them, not the whole table. Two people split a bottle of wine; the non-drinkers don't chip in.
- Tax, tip and service charges are split in proportion to the food. They are percentages of the food, so each person's share of them should match their share of the food.
The itemized bill splitter applies all three for you. Here's the reasoning behind each.
When "just split it evenly" stops being fair
Six friends, most order about $30, one person orders the $75 tasting menu with wine. Drag the sliders.
what each person actually ordered (with tax & tip) the even-split line
Split evenly, everyone pays $48.00. Each of the 5 lighter eaters hands over $9.60 extra, and the big order gets $48.00 of its cost covered.
The even split feels generous in the moment and adds up over a year of dinners. It hits hardest on whoever is watching their budget, which is exactly the person least likely to object at the table. Splitting by item removes the awkward calculation, because nobody has to ask anyone else to pay more.
Why tax and tip should be proportional
Step through how the extras land on each person, then compare with an even split.
The food subtotal is $90.00. Leo's $48.00 is 53% of it, so he carries 53% of everything that is charged on top.
Because sales tax and a percentage tip are both flat rates on the food, the fair split is simple: everyone's total is their own food multiplied by the same factor. At 8% tax and 20% tip, that factor is 1.28, whether you ordered a side salad or the ribeye. A flat rate is the easy case, since it scales in a straight line. Income tax works differently, and a narrated explainer on how US tax brackets work shows why a raise never shrinks your take-home pay.
The leftover-penny problem
Divide $100 three ways and each share is $33.33, a cent short of the total. Try a few amounts.
Round each share
$33.33 × 3 = $99.99
Off by $0.01: the bill is short.
Hand out leftover cents
$33.34 + $33.33 + $33.33
= $100.00 exactly. ItemSplit does this for every item, tax, tip and fee.
A worked example
Maya had a $38 steak, Jon a $22 risotto, Priya a $14 salad. Maya and Jon shared a $48 bottle of wine, and all three shared $16 calamari. Tax is 8.875% and they tip 20% before tax.
| Person | Food | Share of food | Tax + tip | Pays |
|---|---|---|---|---|
| Maya | $38 + $24 + $5.34 = $67.34 | 48.8% | $19.45 | $86.79 |
| Jon | $22 + $24 + $5.33 = $51.33 | 37.2% | $14.82 | $66.15 |
| Priya | $14 + $5.33 = $19.33 | 14.0% | $5.58 | $24.91 |
The bill is $138.00 of food, $12.25 of tax and $27.60 of tip: $177.85 in total. Split evenly, Priya would pay $59.28, more than twice her own meal. Load this example in the bill splitter to check it line by line.
Etiquette that keeps the peace
- Decide before ordering if you're a big group. "Separate checks" or "we'll split by item" said early saves the post-dessert maths.
- Ask for separate checks when the restaurant allows it, especially for groups of more than eight.
- Watch for auto-gratuity. Many restaurants add 18–20% for parties of six or more. Don't tip twice; the tip calculator can check the numbers.
- One card, then settle. Paying with one card is fastest. Share the ItemSplit link so everyone can check their line and pay back the exact amount.
- Couples and singles at one table: treat each couple as one payer if they share finances. In ItemSplit, add the couple as a single name ("Sam & Lee") and assign both their dishes to it, so the single diners don't pay the couple's second drink.
- Service charge vs tip: a service charge is a fee set by the restaurant and is split like tax, in proportion to the food. A tip is voluntary. If the bill already has an 18–20% service charge, most people don't add a full tip on top.
- Birthday dinners: the group usually covers the guest of honour. Leave them off the item assignments and add their items to "Everyone" among the payers.
Questions people ask
What is the fairest way to split a restaurant bill?
Each person pays for what they ordered, shared dishes are divided among the people who shared them, and tax and tip are split in proportion to each person's share of the food. That gives everyone the same effective tax and tip rate on their own meal.
When is splitting evenly fine?
When orders are close in price, or when the group has agreed to it in advance (a birthday dinner, a regular group that takes turns). The sliders above show how quickly an even split drifts away from fair as one order grows.
How do you split a shared appetizer or bottle of wine?
Divide it evenly among the people who had some. If two of four people shared a $48 bottle, each pays $24 for it, and the other two pay nothing toward it.
How do you split tax and tip when someone only had a drink?
Proportionally. If their drink was 5% of the food subtotal, they pay 5% of the tax and 5% of the tip. Splitting tax and tip evenly would make them pay the same tip as someone who ordered a three-course meal.
What if someone forgot their wallet?
Split fairly first, so everyone knows their exact number, then have one person cover the missing share and settle later. For repeated IOUs across a trip, the trip expense calculator keeps track and finds the fewest paybacks.
More ways to split
- Itemized bill splitterAssign each dish to whoever ate it; tax and tip follow.
- Split calculatorSplit evenly, by percentage, by income or by shares.
- Tip calculatorTip on the pre-tax amount, split between any number of people.
- Trip expense calculatorLog who paid for what, get the fewest transfers to settle.
- Split rent calculatorDivide rent by room size, income, or evenly.
- Tip pool calculatorShare pooled tips among staff by hours or points.
- How much to tipA US tipping reference for restaurants, delivery, salons and more.