Bill Split Calculator

Groups never split evenly, someone had the steak, someone skipped drinks, and the bill arrives like a maths exam. This free bill split calculator handles it: enter the subtotal, add tax and tip, then split by head count or by shares when some people ordered more. It shows the per share figure and a rounded amount for settling up. Handles tip percentages, sales tax and service charges, and splits either evenly or item by item so everyone pays exactly their share.

Last updated: October 22, 2026

Written by Ateeq Fareedi · Last updated October 22, 2026

The formula

Tax = subtotal × (tax rate ÷ 100)
Tip = subtotal × (tip percentage ÷ 100)
Total = subtotal + tax + tip
Per share = total ÷ total shares

A worked example

A £120 subtotal with no tax and a 10% service charge comes to £132. Split across five people that is £26.40 each; if two of them take a double share the seven shares work out at £18.86 per share, so the big eaters pay £37.71 and everyone else £18.86.

More about the Bill Split Calculator

The fair way to split a bill

The standard scenario, worked through. A £120 subtotal, no separate tax, 10% service charge: £132 total. Five people splitting evenly: £26.40 each. But two of them take a double share for the steak and the extra bottle, seven shares total, £18.86 per share, so the big eaters pay £37.71 and the other three pay £18.86. Same bill, two fairness models, thirty seconds of arithmetic you did not have to do at the table.

The situations this was built for: the work dinner where the intern ordered a salad and the director ordered the ribeye; the birthday meal where half the table drank and half did not; the group holiday where one person keeps putting everything on their card. In each case the social cost of getting it wrong exceeds the money, nobody wants to be the person who underpaid, or the person who asked everyone to subsidise their wine.

Itemized splits without the awkwardness

Tips for smooth settling. Screenshot the breakdown and share it immediately, transparency kills 90% of bill disputes. Round to friendly numbers for bank transfers (£18.86 → £19) and let the payer absorb the pennies; chasing 14p across five people is not worth anyone's dignity. Settle the same night if you can; group debts that age become awkward. And when in doubt, the person who ordered most should offer the generous interpretation first, it sets the tone.

What it assumes: one bill, one currency, honest inputs. It cannot split across multiple receipts (add them first), does not handle currency conversion, and the shares model is only as fair as the share counts you assign. "He had about double" is fine, false precision is not. For truly itemised splits, the by item mode is fairer than shares; for similar orders, even splits are fairer than itemising. Match the method to the meal.

Tax first or tip first: why the order matters

Work this example in full. A group dinner subtotal is $186. Tax at 8 percent is $14.88, bringing the taxed total to $200.88. A 20 percent tip calculated on the pre tax subtotal, which is the convention many diners prefer, is $37.20. Add all three layers and the table owes $238.08. Split evenly between six people, that is $39.68 each, a figure clean enough to settle on the spot without a pocketful of coins.

Notice what changes if the tip is calculated on the taxed total instead. Twenty percent of $200.88 is $40.18, nearly three dollars more in tip, and each share rises to about $40.18 as well once everything is added and divided. Neither convention is a law, but a group should pick one consciously. Arguing afterwards about which base was used is how a friendly dinner ends with six people studying a receipt under restaurant lighting.

Equal, weighted and itemised splits compared honestly

An equal split is the right tool when orders were broadly similar and the friendship matters more than the last dollar. It takes thirty seconds, nobody audits anybody, and over a year of dinners the wins and losses roughly cancel. Its breaking point arrives when one person ordered water and a salad while another had three cocktails and the most expensive main, at which point equal stops feeling simple and starts feeling subsidised.

A weighted split is the middle path this calculator is built for: give the big orderer a double share and let the arithmetic carry the awkwardness. An itemised split, where every dish is assigned to a person and tax and tip are divided in proportion, is the fairest of all and the slowest. Choose it for work dinners, mixed households sharing groceries, or any table where the spending spread is genuinely wide and everyone knows it.

Rounding cash shares without shorting whoever paid

Cash introduces a small, predictable trap. If six shares of $39.68 are each rounded down to a friendly $39, the person who paid the bill collects $234 against a $238.08 charge and quietly absorbs the difference. Rounded up to $40 each instead, the pot holds $240, and the extra $1.92 covers the rounding honestly and can go toward the tip. Rounding up, always, is the rule that keeps the payer whole.

The second trap is the disappearing diner problem in reverse: someone leaves early, hands over a round sum, and it feels generous until the final total lands higher than anyone estimated. If you are the one leaving, leave against the likely final total including tax and tip, not against your menu items alone, and say clearly that any surplus belongs in the tip. That one sentence prevents the end of night archaeology session entirely.

How to use the Bill Split Calculator

Enter the subtotal from the bill, before tax and service.
Add the tax rate if it is not already included, and the tip or service percentage.
Enter the number of people, and the total number of shares if some are paying double.
Press Calculate, then copy the breakdown into your group chat.

Frequently asked questions

Two of us ordered way more than everyone else. How do we split fairly?

Use shares, not head count. Give the big orders two shares each and everyone else one, then divide the total by the share count. On a £132 bill across five people where two take double shares, that is seven shares at £18.86, the big eaters pay £37.71, everyone else £18.86. Enter it in the shares field above and the calculator does the rest.

Should tax and tip be split across everyone too?

When everyone is going even, yes, tax and service grow with the bill, so dividing the grand total keeps things fair without anyone itemising their dish. The one exception is the non drinker problem covered below: pull the drinks out first, split the food, then handle the drinks separately.

What is the fair way when one person did not drink?

Take the drinks off the shared total and split the food evenly, then divide the drinks only among those who had them, with tax and tip following the same proportions. The calculator's by item mode automates this, which ends the most common restaurant argument before it starts.

The restaurant will not split the payment. Now what?

One person pays the whole total; everyone else transfers their share. Screenshot the calculator's breakdown and drop it in the group chat so all the arithmetic is visible, disputes evaporate when everyone sees the same numbers. Quick sanity check before anyone pays: add up the individual shares and confirm they match the receipt total, stray rounding pennies conventionally land on whoever settled the bill.

Should I enter tax separately in Canada, Australia or the UK?

In Canada, yes, tax goes on at the till, so enter your provincial rate (13% HST in Ontario, for instance). In Australia and the UK the menu price already includes GST or VAT, so leave the tax field at zero and just add the tip or service charge.

What happens when someone leaves before the bill arrives?

Have them pay their share before they go, including their slice of tax and tip, so nobody is chasing money the next day. You can work out one person's share on the spot with the calculator above: enter the subtotal, tax and tip, then settle their portion and move on with the evening.

How do we split the bill when one person had a free item?

The fairest approach is to remove the free item from the subtotal before dividing, so the person who earned the coupon or loyalty freebie keeps the saving. If the discount applied to the whole table, like a 20% off voucher, split the discounted total by shares in the calculator above as usual.

How do I split a restaurant bill with tip?

Add the tip percentage to the subtotal first, then divide by the number of people. A $120 bill with 20% tip = $144, split 4 ways = $36 each. For uneven orders, have each person add tip to their own subtotal (their share × 1.20) and sum the results.

How do we split a bill fairly when paying in cash with round notes?

Calculate the exact shares first, then round every share up to the nearest whole unit your notes allow. Six shares of $39.68 become six payments of $40, totalling $240 against a $238.08 bill, and the small surplus joins the tip. Rounding down instead leaves whoever paid by card or covered the table quietly subsidising everyone else, which is how resentment starts over two dollars.

A service charge is already on the bill. Should we still tip?

Check what the service charge actually is before adding anything. If the bill already includes a 10 or 12.5 percent service charge, that amount is the tip for practical purposes, and adding a full second tip double pays it. Some groups add a small extra for exceptional service, but do it knowingly. Put only the service charge into the calculator’s tip or tax fields once, never the same charge in both.

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