How to Split a Dinner Bill Including Tax and Tip
The fairest way to split tax and tip is proportionally — if you ordered 40% of the food, you pay 40% of the tax and tip. Payback calculates this automatically when you assign items. You can also split tax and tip evenly if your group prefers.
Two methods for splitting tax and tip
Proportional
Default in Payback — fairestIf your food subtotal is 40% of the table's total, you pay 40% of the tax and tip. People who ordered more pay a slightly larger share of the shared costs.
Best for: Best when orders vary significantly — steak vs. salad, multiple drinks vs. none.
Even split
Simpler — good when orders are similarTax and tip are divided equally regardless of what each person ordered. Faster to explain, but slightly unfair when one person had a much cheaper meal.
Best for: Best when everyone ordered roughly the same amount and nobody wants to overthink it.
How Payback handles tax and tip
Scan the receipt and Payback automatically detects tax and tip line items. As you assign food items to each person, Payback builds each person's proportional share in real time. Before you send payment requests, you can switch to even splitting for tax, tip, or both — whatever your group agrees on.
How do you calculate tax and tip per person?
For a proportional split, divide each person's food subtotal by the table's total food subtotal to get their percentage, then multiply that percentage by the total tax and by the total tip. Add those two amounts to their food subtotal. Payback does this calculation automatically the moment you finish assigning items.
Should you split tax and tip evenly or proportionally?
Proportionally is fairer when orders differ — the person who ordered the $40 entrée and two cocktails should contribute more to tip than someone who had a $12 soup. Even splits work fine when everyone had comparable meals and nobody cares about a dollar or two of difference.
How do you tip when splitting a bill?
Calculate tip on the full pre-tax subtotal — not on the tax itself. Standard is 18–20% for sit-down restaurants. When splitting, it is cleanest to agree on one tip percentage for the whole table rather than having everyone tip individually, which can create confusion for the server.
How do you split a bill with different tax rates?
Most restaurant receipts show a single combined tax line, which Payback detects and splits proportionally. If you are splitting a bill that includes items taxed at different rates — like alcohol in some states — Payback lets you edit the tax amount assigned to any item.
What's the formula for splitting a bill with tax and tip?
Person's share = (person's subtotal ÷ table subtotal) × (table subtotal + tax + tip). In practice: find each person's percentage of the food total, then apply that same percentage to tax and tip, then add everything together. Payback computes this for every person as soon as items are assigned.
Frequently asked questions
Stop doing tip math in your head.
Payback splits tax and tip automatically. Free on iOS and Android.