Blog · 6 November 2026
How to Split a Restaurant Bill Fairly: Even, Weighted & Item-by-Item
Three friends, one check, three very different orders — and the usual argument about who owes what. There are only three honest ways to split a restaurant bill: evenly, by agreed weights, or item by item. This guide works each one through with real numbers, including tax and tip, so you can pick the method that fits your table and settle it in under a minute with the tip calculator & bill splitter.
The short answer
If everyone ordered roughly the same, split the total evenly. If orders differed a lot, split item by item: each person pays for what they ordered, plus their proportional share of tax and tip. Weighted splits are for when the group agrees in advance that people pay in proportion to something else, such as income. Whichever method you choose, tax and tip should follow the food — not be split flat — or the person who ordered the salad ends up subsidising the person who ordered the steak.
The example we will use throughout
Ana, Ben and Cara share a meal. Their orders: Ana $42.00, Ben $28.00, Cara $22.00 — a food subtotal of $92.00. Sales tax is 8%, and the group agrees on a 20% tip on the pre-tax amount (the long-standing US convention; see the conventions behind the defaults).
Tax: $92.00 × 8% = $7.36
Tip: $92.00 × 20% = $18.40
Grand total: $92.00 + $7.36 + $18.40 = $117.76
Every method below divides this same $117.76 — the only question is how.
Method 1: split evenly
Divide the grand total by the number of diners. It is fast, it needs no itemising, and it is fair only when everyone ate about the same amount.
$117.76 ÷ 3 = $39.25 for two people and $39.26 for the third.
Why the odd cent? $117.76 does not divide evenly by 3, so the shares are allocated in whole cents — $39.25 + $39.25 + $39.26 = $117.76 exactly. Rounding every share down to $39.25 would leave the table a cent short of the bill.
The problem here is obvious: Cara ordered $22.00 of food but pays $39.26 — $11.10 more than her fair itemised share (worked out below). Even splits are a social choice, not a mathematical one. Use them when the group genuinely agrees, and expect grumbling when orders differ by more than a few dollars.
Method 2: split by weights
The group agrees on weights in advance — for example, by income, or because one person is treating the table to a larger share. Each person pays the grand total multiplied by their weight divided by the total weight.
Weights 3 : 2 : 1 (total weight 6) on the same $117.76 bill:
- Ana (weight 3): $117.76 × 3⁄6 = $58.88
- Ben (weight 2): $117.76 × 2⁄6 = $39.25
- Cara (weight 1): $117.76 × 1⁄6 = $19.63
Check: $58.88 + $39.25 + $19.63 = $117.76 exactly. The weights do not need to be tidy — the calculator normalises any percentages you enter.
Weighted splits are the right tool for regular groups with different incomes, or when one person volunteers to cover a bigger slice. They are the wrong tool for a one-off dinner, because the weights themselves become the argument.
Method 3: item by item (the fairest)
Each person pays for exactly what they ordered, plus their share of tax and tip in proportion to their food subtotal. Tax is charged in proportion to what was ordered, so proportional allocation is arithmetic, not a judgement call.
Ana — items $42.00 (45.65% of the food): tax $7.36 × 45.65% = $3.36; tip $18.40 × 45.65% = $8.40. Pays $53.76.
Ben — items $28.00 (30.43% of the food): tax $2.24; tip $5.60. Pays $35.84.
Cara — items $22.00 (23.91% of the food): tax $1.76; tip $4.40. Pays $28.16.
Check: $53.76 + $35.84 + $28.16 = $117.76 exactly. Tax shares add to $7.36 and tip shares add to $18.40.
This is the method the bill splitter's item-by-item mode does for you: list each dish, tick who ordered it, and the tax and tip follow each person's share automatically.
What about shared dishes?
A shared appetiser or bottle is split equally among only the people who shared it, then added to each person's items subtotal before tax and tip are allocated. Example: a $12.00 shared starter between Ana and Ben adds $6.00 to each of their subtotals. Their shares of tax and tip rise slightly, Cara's do not change — exactly as they should, since she did not touch it.
How tax and tip should be shared
Two rules cover nearly every table:
- Tax follows the food. Sales tax is charged on what was ordered, so each person's tax share is their fraction of the food subtotal. Splitting tax flat per head charges the salad eater the same tax as the steak eater.
- Tip follows the food too — usually. The standard approach is the same proportional split. The common US tipping bands (15% baseline, 18% typical, 20% good service, 25% excellent) are social conventions, not rules — agree the percentage first, then split it proportionally.
One exception: if the tip is meant as a thank-you for service to the whole table rather than a percentage of the food, some groups split the tip evenly while itemising the food. That is a fair choice too, as long as everyone agrees before the bill arrives.
Which method should your table use?
| Situation | Best method | Why |
|---|---|---|
| Similar orders, similar appetites | Even split | Fastest; nobody overpays by much |
| Very different orders | Item by item | Each person pays for what they ordered |
| Regular group, different incomes | Weighted | Shares match what the group agreed |
| Shared plates and bottles | Item by item | Shared items split only among those who shared them |
| One person is treating everyone | Weighted (100 / 0) | Same maths, one weight set to zero |
The cent problem, solved
Bills rarely divide into whole cents. The honest fix is to allocate in whole cents and give the leftover cent (or cents) to one person, so the shares always add back up to the bill total — never round every share the same way and leave the table short. In the even-split example above, one person pays $39.26 while the other two pay $39.25. The calculator does this automatically in every mode.
Bottom line
Agree the method before the food arrives, not after the check does. For most groups with different orders, item by item is the fairest split: your items, plus your proportional share of tax and tip, with the shares adding back up to the total to the cent. Run your own bill through the tip calculator & bill splitter — enter the items, tick who ordered what, and everyone sees their exact share before anyone reaches for a card.
Frequently asked questions
Should tax and tip be split evenly or proportionally?
Proportionally to what each person ordered. Tax is charged on the food, so a person who ordered 45% of the food should carry 45% of the tax and, by the same logic, 45% of the tip. Splitting them flat per head makes the cheapest order subsidise the most expensive one.
How do you split a bill when someone only had a drink?
Item by item: their subtotal is just the drink, so they pay the drink plus their small proportional share of tax and tip — in the example above, Cara's $22.00 order came to $28.16 all-in, instead of $39.26 on an even split.
Is it rude to split a bill item by item?
Not if the group agrees upfront. It only feels awkward when it is sprung on the table after the meal. Suggest it when ordering — "let's each cover what we order" — and nobody is surprised when the check arrives.
Do you tip on the pre-tax or post-tax total?
The long-standing US convention is pre-tax: the tip rewards the food and service, not the sales tax. On the $92.00 example, a 20% tip is $18.40 pre-tax versus $19.87 on the post-tax total of $99.36 — a $1.47 difference. Either is acceptable; the calculator lets you toggle between the two.
Tipping percentages on this site are US social conventions, not rules or legal requirements. Figures are worked from the example bill shown; run your own numbers through the calculator for your table.