How to Split a Restaurant Bill (Including Tip and Unequal Splits)
Splitting a bill evenly is simple. Splitting it fairly when people ordered differently is harder. Here's the math for even splits, proportional splits, and how to handle tip correctly each way.
The Even Split (Simplest Case)
For a table where everyone agrees to split evenly:
Each person pays = (Total bill + Tip) ÷ Number of people
Example: $180 total bill, 5 people, 18% tip.
Tip = $180 × 0.18 = $32.40 Total with tip = $212.40 Each person pays = $212.40 ÷ 5 = $42.48
Use our Tip Calculator to calculate tip amounts and per-person splits instantly.
When to Tip on Subtotal vs Total
Always tip on the pre-tax subtotal, not the post-tax total. If your bill is $180 pre-tax and $195 after a $15 tax:
- Tip on $180 (correct) at 18% = $32.40
- Tip on $195 (incorrect) at 18% = $35.10 — you're paying 18% on tax, which is odd
Most people tip on the pre-tax total. Some tip on the post-tax total for simplicity — the difference is small on typical tabs.
Quick Tip Reference
| Bill Subtotal | 15% Tip | 18% Tip | 20% Tip |
|---|---|---|---|
| $50 | $7.50 | $9.00 | $10.00 |
| $80 | $12.00 | $14.40 | $16.00 |
| $120 | $18.00 | $21.60 | $24.00 |
| $180 | $27.00 | $32.40 | $36.00 |
| $250 | $37.50 | $45.00 | $50.00 |
The Proportional Split (Unequal Orders)
When people order very differently — one person gets an entrée and water, another gets cocktails and an appetizer — even splits feel unfair. The proportional method:
- Each person calculates the subtotal of their own items
- Tip is added proportionally (same percentage applied to each person's share)
- Tax is split either evenly or proportionally
Example: 3 people, $150 pre-tax total.
- Person A ordered $40 of food
- Person B ordered $65 of food
- Person C ordered $45 of food
At 20% tip:
- Person A pays: $40 + ($40 × 0.20) = $48
- Person B pays: $65 + ($65 × 0.20) = $78
- Person C pays: $45 + ($45 × 0.20) = $54
Total collected: $48 + $78 + $54 = $180 ✓
Handling Shared Items
Appetizers, bottles of wine, and desserts shared by the table are tricky. Two approaches:
Even split of shared items: Divide the shared items' cost equally, then add each person's individual items.
Percentage split of shared items: Divide shared items in proportion to each person's individual order size. Fairer but more complex.
For most casual situations, splitting shared items evenly is the simpler and socially smoother choice.
The "One Person Pays, Everyone Venmos" Method
In practice, the most common approach at restaurants:
- One person puts the entire bill on their card
- They calculate what each person owes (using even or proportional split)
- Others pay via Venmo, Zelle, or cash
This simplifies the transaction for the restaurant and avoids the multi-card awkwardness that some establishments dislike.
Unequal Splits by Agreement
Sometimes a group agrees in advance on unequal splits — for example, the birthday person doesn't pay, or a couple covers a specific person's meal. In these cases:
Step 1: Subtract the covered portion from the total. Step 2: Split the remainder among paying parties by the agreed method.
Example: 6 people, $240 total bill + 20% tip = $288. The birthday person's share (even split) = $48. The remaining 5 people cover that $48: $48 ÷ 5 = $9.60 extra per person, so each of the 5 pays $48 + $9.60 = $57.60.
Conclusion: Key Takeaways
- Even split: (Total + Tip) ÷ people
- Tip on pre-tax subtotal, not the post-tax total
- Proportional split: each person pays their items × (1 + tip rate)
- Shared items can be split evenly for simplicity or proportionally for fairness
- When amounts differ a lot, proportional splitting prevents the person who ordered a salad from subsidizing the person who ordered steak and three cocktails