Bills and receipts

How to split a bill by what each person ordered

One person had a salad, another had steak and half a bottle of wine. Assigning the items is the easy part. The step almost every bill calculator gets wrong is tax and tip, and on the bill below it costs the salad orderer $9.25 more than she owes.

Updated September 20268 min read

The short version

Assign every item to whoever had it, splitting the shared ones between the people who shared them. Then add tax and tip to each person in proportion to what their items came to, not divided evenly.

That second half is the whole article. Tax is a percentage of the order and tip is calculated the same way, so both scale with what you ate. Dividing them evenly takes money from the person who ordered least and gives it to the person who ordered most, quietly, in a step that feels like tidying up.

The number

On the bill below, splitting tax and tip evenly instead of proportionally costs Ana, who had a $9 salad, an extra $9.25. That is 63 percent on top of the $14.61 she actually owes, from a decision nobody at the table would describe as a decision.

Why evenly-split tax and tip is wrong

Think about what those two lines are. Tax is a fixed percentage of the subtotal. Tip, however you calculate it, is a percentage of the subtotal. Neither is a per-person charge, like a cover fee would be. They are both proportional to the food.

So when the bill arrives and somebody says “you had the salad, that is $9, plus your share of tax and tip”, the second half of that sentence has already gone wrong. Ana’s food generated a small amount of tax and a small tip. Charging her a third of the table’s means charging her for tax on a steak she did not eat.

Why it slips past everyone

The subtotal feels like the real bill and tax and tip feel like an administrative extra, so people itemize the first carefully and wave at the second. But at 8.875 percent tax and a 20 percent tip, those two lines are nearly 29 percent of what you hand over. Waving at 29 percent of a bill is not a rounding decision.

The same bill, three ways

Three people. Ana had a $9 garden salad. Ben had a $48 ribeye. Cleo had $24 of pasta. Ben and Cleo shared a $42 bottle of red, and all three shared $7 of bread.

Subtotal $130.00, tax at 8.875 percent adds $11.54, a 20 percent tip adds $26.00. The bill is $167.54.

Ana (salad)

Items: $11.34
Correct: $14.61
Charges evenly: $23.86 (+$9.25)
Whole bill evenly: $55.85 (+$41.24)

Ben (steak, wine)

Items: $71.33
Correct: $91.93
Charges evenly: $83.84 (-$8.09)
Whole bill evenly: $55.85 (-$36.08)

Cleo (pasta, wine)

Items: $47.33
Correct: $61.00
Charges evenly: $59.84 (-$1.16)
Whole bill evenly: $55.84 (-$5.16)

Person	Items	Correct	Charges evenly	Whole bill evenly
Ana (salad)	$11.34	$14.61	$23.86 (+$9.25)	$55.85 (+$41.24)
Ben (steak, wine)	$71.33	$91.93	$83.84 (-$8.09)	$55.85 (-$36.08)
Cleo (pasta, wine)	$47.33	$61.00	$59.84 (-$1.16)	$55.84 (-$5.16)

Every column adds back to $167.54. The differences are what somebody over or underpays under each rule.

Read Ana’s row across. She owes $14.61. Split the charges evenly and she pays $23.86. Split the whole bill evenly and she pays $55.85, which is nearly four times what she ate, for a salad.

Splitting a bill evenly is a decision to subsidize whoever ordered most. That is a perfectly fine thing to choose. It is not a fine thing to do by accident.

Wine, bread, and things two people shared

Something two of you had

Assign it to both and let it divide between them. The $42 bottle is $21 each to Ben and Cleo, and that $21 then flows into their item totals, which is what their tax and tip are calculated from. Do not put a shared bottle on one person and settle it separately afterwards: it works, but you have then taken it out of the proportional calculation and it stops being counted properly.

Something for the table

Assign it to everybody. The $7 of bread is $2.34, $2.33 and $2.33, because seven does not divide by three. That odd cent is not a rounding sloppiness to be waved away, and where the extra cent goes is about exactly that: the parts have to add back to the item, or the bill stops reconciling.

A discount or a service charge at the bottom

Treated identically to tax, because it behaves identically: prorated across everyone by their share of the items. A discount is simply a negative charge, so the person who ordered most receives most of it, which is the same logic running the other way.

Split your own bill

Put in the items and tap who had each one. The correct column is highlighted, and the two on the right show what the same bill would cost each person under the rules to avoid.

Who was there

What was ordered

had by

Tax %Tip %

Subtotal $130.00 plus tax $11.54 plus tip $26.00 is $167.54.

Person	Their items	Tax + tip	Correct	Charges split evenly	Whole bill evenly
Ana	$11.34	$3.27	$14.61	$23.86+$9.25	$55.85+$41.24
Ben	$71.33	$20.60	$91.93	$83.84-$8.09	$55.85-$36.08
Cleo	$47.33	$13.67	$61.00	$59.84-$1.16	$55.84-$5.16

All three money columns add back to $167.54 exactly. The two on the right are what the same bill costs each person under the wrong rules, so the pink numbers are what somebody overpays.

Free tool, no signup

Bill split calculator

For when everyone shared everything and you just need the total divided with tip and tax. No signup, inputs saved on this device.

When not to bother

If everyone ate roughly the same, split it evenly and enjoy the evening. The whole exercise above matters in proportion to how uneven the orders were, and on a table where four people all had a main and a drink the difference is small enough that the arithmetic costs more goodwill than it recovers.

The signals that it is worth itemizing:

Somebody is drinking and somebody is not. Alcohol is the single biggest source of spread.
Somebody had one course and somebody had three.
The bill is large enough that a third of it is a meaningful amount of money to the person with the smallest order.

And once shares are settled, the remaining work is the same as for any group cost: work out one net figure per person rather than paying each other back item by item. How to split shared costs fairly covers which method suits which cost, and the fewest payments that settle everyone up turns a table full of shares into a couple of transfers.

Common questions

How do you split a restaurant bill when everyone ordered different things?

Assign each item to whoever had it, then add tax and tip to each person in proportion to what their items came to. The step nearly every calculator skips is that second part: tax and service are a percentage of what was ordered, so they belong to each person in the same proportion as the food. On the bill in this article, dividing them evenly instead costs the person who ordered a $9 salad $9.25 more than she owes.

Should you split tax and tip evenly or by what you ordered?

By what you ordered. Tax is charged as a percentage of the bill, and tip is calculated the same way, so both scale with the order rather than with the number of people. Splitting them evenly quietly transfers money from the cheapest order to the most expensive one: it is the same error as splitting the whole bill evenly, just smaller and harder to notice.

How do you handle something two people shared, like a bottle of wine?

Assign it to both of them and let it divide between them, rather than counting it as one person's or splitting it across the table. In the worked example a $42 bottle shared by two people is $21 each, and it flows into their item totals, which is then what their share of tax and tip is calculated from. Anything genuinely for the table, like bread, is assigned to everybody.

Is splitting a bill by item worth the effort?

It depends entirely on how uneven the orders were. If everyone ate roughly the same, split it evenly and do not spend the evening on arithmetic. It is worth doing when one person had a starter and tap water and another had steak and a bottle of wine, because on the bill here that gap is $41.24, which is real money rather than a rounding argument.

What if someone paid the whole bill?

That is the normal case and it does not change the arithmetic, only who owes whom. Work out each person's share including their prorated tax and tip, then subtract what they paid. Everyone who paid nothing owes their full share to whoever covered it, which is one payment each rather than a discussion about who had what.

Does this work for a grocery bill too?

Yes, and it is often more useful there, because a shopping trip is usually a mix of genuinely shared staples and things only one person eats. Assign the individual items to their owner, assign the shared ones to everybody, and any bag charge or discount at the bottom prorates the same way tax does. The method does not care whether the charge at the end is tax, service or a delivery fee.

Or photograph the receipt

Halvy reads a receipt from a photo, lists the items, and lets you tap who had each one. Tax and tip prorate automatically, so the split is right without anybody doing percentages at the table. Free on iOS and Android, no ads, and it never asks to connect to a bank.

Download on theApp Store Get it onGoogle Play

Every figure here was produced by running Halvy’s own itemized-split function on the worked example, which is why all three columns reconcile to $167.54 rather than to within a cent. Tax at 8.875 percent is used as a realistic example rate, not a claim about any particular place: yours will differ, and the calculator takes whatever it is.