How to calculate the tip and split the bill
When the check arrives, three questions come up at once: is a service charge already included, how much should you tip, and how much does each person owe? This calculator answers all three.
Tip on the pre-tax subtotal
Etiquette guides usually suggest tipping on the subtotal before sales tax, commonly 15% to 20% for table service. Many people simply tip on the total; the difference is small, and the calculator lets you choose.
Service charges
Some restaurants add an automatic service charge or gratuity, often for groups of six or more. If it is on the receipt, it normally replaces the tip, so check before adding another one.
Split and round
In the example, three people have a $120 subtotal with 8% sales tax ($9.60) and an 18% tip ($21.60). The bill comes to $151.20, or $50.40 each. Rounding up to the next dollar, each pays $51 and the table leaves $153, an effective tip of 19.5%.
When an equal split is not fair
If one person ordered much more, an equal split weighs on the others. Take the total to the expense splitter and list who had what.