Split the Bill When Everyone Ordered Differently
Splitting the bill evenly works when everyone ordered roughly the same thing. It stops working the moment one person orders a cocktail and another drinks water.
This is the most common source of tension at group dinners: someone feels like they're subsidizing someone else's meal, but nobody wants to be the person who makes it weird by asking to split by item. So everyone agrees to split evenly, and someone quietly overpays.
The math nobody wants to do
Here's a real scenario. Five friends at dinner.
Person A: grilled salmon, glass of wine. $42.
Person B: chicken tacos, beer. $24.
Person C: pasta, two cocktails. $51.
Person D: side salad, sparkling water. $16.
Person E: burger, fries, soda. $22.
Subtotal: $155. Tax (8%): $12.40. Tip (20%): $31.00. Total: $198.40.
Split evenly: $39.68 each.
Person D, who ordered $16 worth of food, pays $39.68. They're covering nearly $24 they didn't spend. Person C, whose items cost $51, pays $39.68. They save $18 at Person D's expense.
Nobody did anything wrong. The system is just lazy.
Split by item with proportional tax and tip
The fair approach: each person pays for their items, plus tax and tip in proportion to what they ordered.
Person D's items ($16) are 10.3% of the $155 subtotal.
Person D's tax: $1.28. Person D's tip: $3.19. Person D's total: $20.47.
That's $19.21 less than an even split. Over a year of monthly dinners with this group, that's $230 kept in Person D's pocket.
The awkward part
Nobody wants to sit at the table with a calculator parsing the receipt. It feels cheap, even when the math says it's fair. The social pressure to "just split it" is real, and it consistently favors whoever orders the most.
Some groups solve this with a photo of the receipt in the group chat and a Venmo request. But that still requires someone to do the math, and they almost always get the tax and tip allocation wrong. Usually the person who places the Venmo request just divides tax and tip evenly, which brings back the same problem at a smaller scale.
A better way
Divvi removes the awkward part. One person scans the receipt, shares a link, and everyone claims what they ordered on their own phone. Tax and tip are allocated proportionally based on each person's food total. The whole process takes about 30 seconds and nobody has to be "that person" with the calculator.
Fair splits without the social friction.