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Itemized Bill Splitter

Split a restaurant or group bill by assigning specific item costs to each person, plus a shared tax and tip.

Result

Person 1 Owes
$36.9
Person 2 Owes
$29.52
Total Bill
$66.42

Each person's tax and tip is scaled proportionally to their own item subtotal (including their share of any shared items), rather than split evenly - this means whoever ordered more pays a proportionally larger share of the tax and tip, matching how a receipt's tax is actually calculated per item.

About the Itemized Bill Split

The Itemized Bill Splitter figures out exactly what each diner owes on a shared check by starting from what each person actually ordered rather than dividing the total evenly. It is built for situations like a restaurant meal where one person got the steak and another got a salad, so an even split would shortchange the lighter eater and undercharge the big spender. Enter each person's item subtotal, any items you shared, and the combined tax and tip rate, and the calculator returns two individualized totals.

How It Works

You enter Person 1's and Person 2's individual item totals, a dollar amount for anything ordered to share (like an appetizer), and the combined tax and tip percentage printed at the bottom of the receipt. The calculator adds half of the shared-item cost to each person's own item total to get their subtotal, then applies the tax and tip percentage to that subtotal rather than to the bill as a whole. The result is two final amounts owed, one per person, plus the combined total bill.

sharedEach = sharedItems / 2; Person1Total = (person1Items + sharedEach) x (1 + taxTipPercent); Person2Total = (person2Items + sharedEach) x (1 + taxTipPercent)

Formula & Methodology

Add each person's individual item total to their half of the shared items to get a subtotal. Multiply that subtotal by (1 + combined tax and tip rate expressed as a decimal) to scale the tax and tip proportionally to how much that person actually ordered. Because the same percentage is applied to both subtotals, a person's share of the tax and tip grows in exact proportion to their share of the food, matching how sales tax is genuinely calculated line by line on a real receipt.

Examples

Typical dinner for two

Person 1 orders $24 in food, Person 2 orders $18, and they split a $12 appetizer, with a combined 23% tax and tip. Each pays $6 toward the shared item, giving subtotals of $30 and $24, so Person 1 owes $36.90 and Person 2 owes $29.52, for a total bill of $66.42.

Bigger check at 20%

Person 1's items total $40 and Person 2's total $25, with a $20 shared appetizer and a flat 20% tax and tip. Each subtotal comes to $50 and $35, so the final amounts owed are $60.00 and $42.00.

Advantages

  • Assigns tax and tip proportionally to what each person actually spent instead of dividing it evenly, which better matches how the tax was really calculated on the receipt.
  • Handles shared appetizers or dishes separately from individually ordered items so nobody argues over who owes for the shared nachos.
  • Produces both individual amounts and a combined total bill in one calculation, useful for double-checking against the printed receipt total.

Common Mistakes

  • Splitting the whole bill, including tax and tip, evenly by headcount even when order sizes were very different, which overcharges the person who ordered less.
  • Forgetting to include a shared item's cost in either person's subtotal, which causes the calculated total to fall short of the actual bill.
  • Entering the tip amount in dollars instead of as a percentage of the bill, which throws off the proportional scaling this calculator relies on.

Edge Cases to Watch For

  • The shared-item amount is always split into exactly two equal halves, so the tool is built for two people; a table of four sharing an appetizer would need the shared cost divided differently before entering it.
  • If the combined tax and tip percentage is left at 0, each person's total simply equals their subtotal with no markup.
  • The calculator does not separate tax from tip, so if your tip should be calculated only on the pre-tax subtotal (a common practice), you will need to compute that portion outside the tool.

Common Use Cases

  • Friends or couples splitting a restaurant check where orders were noticeably uneven in cost.
  • Roommates dividing a shared takeout order that included both individual dishes and a shared side.
  • Anyone settling a bill who wants the tax and tip allocation to reflect actual spending rather than a flat even split.
Written & fact-checked by the Calculateus TeamLast updated August 5, 2026How we verify our formulas

Frequently asked questions

Why scale tax and tip proportionally instead of splitting them evenly?

Sales tax is technically charged per item, so someone who ordered a more expensive dish generates more actual tax - scaling both tax and tip proportionally to what each person ordered better reflects the receipt's real math than simply dividing the tax and tip total evenly regardless of what each person spent.

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Conclusion

The Itemized Bill Splitter turns a receipt with mixed individual and shared items into a fair, itemized breakdown in seconds. Because tax and tip scale with each person's own subtotal, the numbers it produces line up closely with how the bill was actually taxed in the first place.