Tip Calculator and Bill Splitter: How Much Each Person Pays

Tipping etiquette by service type and country

In US sit-down restaurants, 18 to 20 percent of the pre-tax subtotal is the standard. Excellent service or large parties can warrant 22 to 25 percent. Mediocre service still typically gets 15 percent unless the failure was egregious. Below 15 percent in the US is essentially a statement that something went wrong.

Counter service, takeout, and coffee shops have shifted over the last decade as payment terminals routinely show 15, 20, and 25 percent options on a $5 latte. Norms here are less established; tipping is appreciated but not required for simple counter transactions in most regions. Delivery services typically warrant 15 to 20 percent of subtotal with a $3 minimum.

Western Europe runs 5 to 10 percent in restaurants with service not included, or rounding-up when service is included on the bill. The UK is similar to Europe with a 10 to 12.5 percent service charge increasingly common on bills. Japan and South Korea do not have a tipping culture; tipping can be confusing or even uncomfortable for the recipient.

The Middle East and parts of Asia have variable norms. Singapore typically includes a 10 percent service charge and 9 percent GST on bills; additional tip is uncommon. India varies between cities; 10 percent is a reasonable default in tourist areas, with service charges sometimes included.

Tip on pre-tax or post-tax?

The standard US etiquette is to tip on the pre-tax subtotal. This is what etiquette columnists and the restaurant industry recommend. The practical effect is small (a few percent) but it avoids implicitly paying tax on the tax, which is odd. Some people tip on the post-tax total as a simpler heuristic or as a slightly more generous default; this is also acceptable.

For counter service, the receipt usually only shows the subtotal-plus-tax total before tip, so practical tipping is on the post-tax figure. For sit-down restaurants where the bill clearly shows the subtotal separately, use the subtotal as the tip base.

When to split unevenly

Even splitting works when everyone ordered similar items in similar quantities. It breaks down when one person ordered a $90 steak and another ordered a $14 pasta, or when one person had three glasses of wine and another had water. Unequal splits are appropriate; the friction in handling them is usually social, not arithmetic.

For an item-level split, the cleanest approach is for each person to compute their own subtotal, then multiply by (1 + tax-rate + tip-rate) to get their share. So if your items totalled $20 in a meal with 8.5 percent tax and 18 percent tip, your share is $20 times 1.265, or $25.30. This calculator does not yet handle item-level splits but a future version will accept per-person subtotals.

Group payment apps and digital splitting

Apps like Splitwise, Venmo, and Zelle make group settling much easier than it used to be. The flow is typically: one person puts the entire bill on their card, then computes per-person amounts (using this calculator or similar), then sends a request through the app for each person's share. Most apps allow attaching a description and an itemised breakdown so the request looks defensible.

For recurring groups (roommates, regular dinner crew), Splitwise's account-based bookkeeping that tracks who owes whom across many transactions is particularly useful. For one-off groups, a simple peer-to-peer payment request after the meal works.

What this calculator does not include

Item-level splits where each person owes a different amount based on what they ordered. Currency-specific tipping defaults (the calculator does not change defaults based on country). Service charges already included in the bill (subtract these from subtotal before entering, or zero out the tip percentage). Mandatory gratuity for large parties (some restaurants add 18 to 20 percent automatically for parties of 6 or 8 or more). Round-up tipping (where you round the total to the next even amount rather than computing a percentage). For most basic group splits in a sit-down restaurant, the calculator's even-split output is exactly what you need.