What is the Formula for Split Bills?

Bill splitting formulas help ensure accurate and fair expense sharing. Here are the most common formulas for different scenarios:

1. Basic Even Split

Per Person Amount = Total Bill ÷ Number of People

2. Split with Tip and Tax

Total with Extras = Bill + (Bill × Tip%) + (Bill × Tax%) Per Person = Total with Extras ÷ Number of People

3. Proportional Split (by Income)

Person's Share = Total Bill × (Person's Income ÷ Total Group Income)

🧮 Calculation Tips

• Convert percentages to decimals (15% = 0.15)

• Round final amounts to two decimal places

• Double-check that individual shares sum to total

• Include all applicable fees and charges

• Consider using our calculator for accuracy

Special Scenarios

Different situations may require modified formulas:

• Uneven Splits: Assign "shares" based on usage or consumption

• Mixed Expenses: Calculate shared and individual portions separately

• Group Discounts: Apply discounts before splitting

• Recurring Bills: Consider monthly vs. annual costs

Using Our Calculator

Our calculator below automatically handles these formulas for you. Simply enter the bill amount, any tip or tax percentages, and the number of people. The calculator will instantly show the correct amount per person.