How to split a restaurant bill (including tax and tip)
Equal, by item, or somewhere in between — and where the tax and tip actually belong.
In this guide
Split a restaurant bill equally when everyone ordered roughly the same value, and by item when they did not. Either way, apportion tax and tip in the same proportion as the food: work out each person’s share of the pre-tax subtotal, then apply that same percentage to the total including tax and tip. Splitting the food by item but the tip equally is the mistake that quietly overcharges the person who ordered least.
- Tax and tip scale with what you ordered, so they should be divided in the same ratio as the food — not equally on top of an itemised split.
- Tip on the pre-tax subtotal. Tipping on the post-tax total quietly raises the tip by the tax rate.
- Equal splitting is faster and usually fine; switch to itemised only when one order is clearly out of step with the rest.
- Rounding leaves a cent or two unaccounted for — let one person absorb it rather than chasing it.
- Shared plates go into the pot and get divided by whoever actually ate them, not by the whole table.
Most disagreements about a restaurant bill are not about generosity. They happen because two reasonable methods were mixed together: the food was split by item, and then the tip was split equally. The result is that the person who ordered a salad subsidises the tip on somebody else’s steak.
Equal or by item?
The honest test is whether anyone at the table would notice the difference. Below roughly a 25% spread between the largest and smallest order, an equal split costs less goodwill than the conversation about itemising would.
| Method | How it works | Best when | Effort |
|---|---|---|---|
| Equal split | Total including tax and tip ÷ number of people. | Orders are similar, or the group eats together often and it evens out. | None |
| By item, proportional | Each person’s items ÷ subtotal, applied to the full total. | One or two orders are far above or below the rest. | Low |
| By item, exact | Each person pays their items plus their own tax and tip. | Alcohol or a shared bottle skews one part of the table. | Medium |
| One payer, settle later | One card covers it; shares are recorded and settled afterwards. | The venue will not split payment, or the group is large. | None at the table |
Where tax and tip belong
Tax is charged as a percentage of what was ordered, so it already scales with each person’s items. Tip conventionally does the same. That gives you a single clean rule: find each person’s share of the pre-tax subtotal, then apply that percentage to the total.
- Add up each person’s items. Use the pre-tax prices from the receipt. Put shared plates aside for now.
- Divide shared plates between whoever ate them. Split a shared starter between the four people who reached for it, not across the whole table, then add each portion to that person’s subtotal.
- Calculate the tip on the pre-tax subtotal. A 20% tip on a $90 subtotal is $18.00 — not 20% of the post-tax figure, which would hand the venue’s tax rate to the tip as well.
- Work out each person’s percentage of the subtotal. Their items ÷ the subtotal. These percentages must add to 100% before you go any further.
- Apply that percentage to the grand total. Subtotal plus tax plus tip, multiplied by each person’s percentage. Check the shares add back to the total, then let one person absorb any rounding cent.
An equal split of the same bill is $29.00 each. The person who ordered $16.00 of food pays $8.38 more than their proportional share, and the person who ordered $32.00 pays $12.24 less. Over one dinner that is noise. Over a group that eats together every week and always splits equally, it is a standing transfer in one direction.
The cases that cause arguments
- A shared bottle of wine. Divide it between the people who drank it. If two of six are not drinking, an equal split of a $70 bottle is a real cost to them.
- Someone arrives late or leaves early. They pay for what they ordered. Do not pro-rate a meal by time.
- A birthday. Decide before the bill arrives whether the table is covering the guest of honour, and divide their share across everyone else in the same proportions.
- Someone forgot their card. Record it as a debt the same evening rather than trusting memory. Asking for it back later is much easier when there is a record.
The fastest split at the table is the one the group already agreed on before the menus arrived.
If it is the same group every time
A group that eats together regularly does not need to settle every meal. Record who paid each time and let the balances run, then settle once a month — the same pattern that works for shared household bills. Ten dinners of roughly equal value net out to almost nothing, and the two that were lopsided are already on the record.
Frequently asked questions
Should you tip on the pre-tax or post-tax total?
How do you split a bill when one person did not drink?
What is the fairest way to split the tip?
Is it rude to ask for separate checks?
How do you handle the leftover cent when a bill will not divide evenly?
Jonas M.
Product contributor to Expenso’s splitting tools
Jonas works on the part of Expenso that decides who owes what. He writes about the mechanics of shared money — why simplified debts work, where splitting rules break down, and what actually changes when a bill repeats every month.
