Split a bill by what each person actually ordered
Equal splitting is convenient, but it can feel unfair when the group's spending is very different. The Uneven Split Bill Calculator lets each person keep a personal subtotal, adds shared items only to the people who shared them, and then allocates tax, service charges, and tip without losing remainder cents.
Start by adding each participant and entering the amount that belongs only to that person. Then add shared items such as appetizers, bottles, desserts, or group fees and select exactly who shared each item.
Personal subtotals and shared items
Imagine three people order:
- Alex: $24 of personal items
- Jordan: $52 of personal items
- Taylor: $19 of personal items
The table also shares a $15 appetizer. If all three people shared it, the calculator divides that item among all three before allocating the other charges.
If only Alex and Jordan shared the appetizer, select those two people. Taylor will not receive any portion of that item.
A shared item with a positive amount is not included until at least one participant is selected. That prevents an unassigned item from being silently spread across the group.
Allocate tax, service charges, and tip
The calculator supports two allocation methods for the charges added after the item subtotals are known.
Proportional allocation assigns more of the tax, service charge, and tip to people with larger item subtotals. If one person represents 40% of the spending, that person receives roughly 40% of those shared charges, with final cent-level adjustments to keep the total exact.
Equal allocation divides those charges evenly between participants, regardless of what each person ordered.
Choose the method the group agrees on before paying.
Tip on the subtotal or after tax
The tool can calculate the voluntary tip from the pre-tax subtotal or from the amount after tax. When the tax rate is entered, switching the tip basis changes the tip total before that amount is distributed among participants.
A mandatory service charge remains a separate input. The IRS distinguishes compulsory service charges from voluntary tips, so keeping them separate is useful when a receipt already contains an automatic gratuity or required fee.
Exact cent allocation matters
Uneven splits create more rounding opportunities than equal splits. Personal subtotals, shared items, tax, fees, and tip may all produce fractions of a cent during allocation.
The calculator works in the smallest currency unit and distributes remainder cents deterministically. The sum of all participant totals therefore matches the calculated grand total exactly.
For example, a $10 shared item among three people cannot be divided into three identical cent values. The result may be $3.34, $3.33, and $3.33 rather than showing three rounded amounts that only add to $9.99.
A practical restaurant example
Suppose three diners have personal subtotals of $24, $52, and $19, and all three share a $15 appetizer. The combined subtotal is $110.
If the receipt adds tax and the group chooses a 20% tip, the calculator first determines the complete tax, service-charge, and tip amounts. It then allocates each charge using the selected method and displays a row for every person showing:
- item subtotal
- tax
- service charge
- tip
- final total
That breakdown makes it easier to explain the result when people are paying separately.
When to use proportional allocation
Proportional allocation is usually the better fit when the group wants each person's extra charges to follow their actual spending. Someone who ordered a more expensive meal receives a larger share of the tip and tax than someone who ordered much less.
Equal allocation can still make sense when the group agrees that certain charges should be shared the same way regardless of order size.
When a simple split is enough
If everyone's spending is close and nobody needs item-level detail, the regular Split Bill Calculator is faster. Use this uneven tool when personal orders, shared dishes, or fairness between different spending levels are the main reason for calculating the split.
Related guidance for a fair group check
The How to Split a Restaurant Bill Fairly guide explains when I choose an equal split, an itemized split, or a shared-item approach. If everyone spent roughly the same amount and the group only needs a fast division, the Split Bill Calculator is simpler.
For restaurant-specific tip and service-charge checks before allocating the bill, see the Restaurant Tipping Guide and Service Charge vs. Tip.