Tip Calculator
Calculate online tip amounts, receipt totals, service charges, tax basis, split shares, and rounding notes for clearer restaurant payment decisions.{{ summaryHeading }}
| Line item | Amount | Basis | Per-person impact | Copy |
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| {{ row.item }} | {{ row.amount }} | {{ row.basis }} | {{ row.impact }} |
| Person | Pays | Tip share | Settlement note | Copy |
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| {{ row.person }} | {{ row.pays }} | {{ row.tipShare }} | {{ row.note }} |
| Check | Status | Detail | Action | Copy |
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| {{ row.check }} | {{ row.status }} | {{ row.detail }} | {{ row.action }} |
Tip math starts with a receipt, a gratuity choice, and a payment split. The same meal can produce different totals depending on whether the tip is based on the pre-tax subtotal, the taxed amount, or a bill that already includes a service charge.
That difference matters most when a group is settling quickly. A 20 percent tip on the subtotal is lower than a 20 percent tip on the subtotal plus tax, and including an automatic service charge in the tip base raises it again. Rounding can also collect more than the exact receipt total when everyone pays a cash-friendly amount.
A calculated tip is only a payment aid. It does not settle local tipping norms, workplace rules, or whether a required service charge is treated like a voluntary gratuity. Read the receipt before adding a second tip on top of an automatic charge.
Technical Details:
Percentage tipping is a base-rate calculation. The base can be the pre-tax subtotal, the subtotal plus tax, or the subtotal plus tax and service charge. A fixed tip skips the percentage base for the amount itself, but the same base still helps show the effective tip rate.
The final receipt total combines the bill components and the tip. Splitting then works in cents so penny remainders can be assigned cleanly, or each person can be rounded up to the selected cash increment.
| Term | Meaning | Notes |
|---|---|---|
| Bill subtotal | Receipt amount before tax, service charge, and tip. | Negative entries are treated as zero. |
| Tip base | The selected amount used for percentage tipping. | Subtotal, subtotal plus tax, or subtotal plus tax and service charge. |
| Receipt total | Subtotal plus tax, service charge, and tip. | Displayed as the amount to settle before any rounding over-collection. |
| Payment Shares | Per-person rows after exact-cent distribution or round-up mode. | People are rounded and capped from 1 to 50. |
| Rounding adjustment | Collected total minus receipt total. | Positive values mean the group collected extra. |
Review notes appear when a rate looks unusually high, a negative number was converted to zero, a service charge is excluded from the percentage tip base, or rounding collects more than the exact receipt total.
Everyday Use & Decision Guide:
Enter the receipt subtotal first, then choose whether the tip should be a percentage or a fixed amount. Use Subtotal before tax when the group wants a service-based tip, and switch to the wider bases only when the receipt suggestion or local habit includes tax or service charge.
Set People after the bill components are correct. Exact cents is best for card payments because it distributes penny remainders across the roster. Round-up modes are useful when people are paying cash, but the Receipt Check tab should show the extra collected amount before anyone pays.
- Use Service charge for automatic gratuity, delivery, cover, or fixed service fees already printed on the receipt.
- Change Currency symbol only for display; it does not convert currencies.
- Open Tip Rate Ladder when the group wants to compare nearby rates before settling.
- Check Payment Shares when people need individual amounts, not just the receipt total.
A high effective rate does not prove the math is wrong. It often means the fixed tip is large, the tip base is small, or the service charge was included in the percentage base.
Step-by-Step Guide:
Use the result tabs as a receipt audit before copying a payment amount.
- Enter Bill subtotal and Tax rate. The summary should update the receipt total and show a tip badge.
- Select Tip by percent with a Tip rate, or select Tip by amount when the gratuity is already decided.
- Choose Tip basis for percentage mode. In fixed amount mode, use the effective-rate badge to judge the entered amount against the displayed base.
- Set People and Per-person rounding. If the people count is outside the allowed range, the receipt notes will state that it was rounded and capped.
- Add Service charge only when the receipt has a separate fixed charge. Then read Receipt Check for tax delta, service-charge status, rounding, and equal-split warnings.
- Use Tip Breakdown for the receipt components and Payment Shares for what each person pays.
If the summary shows a note count, clear the issue or keep the note with the copied result so the payment basis is not lost.
Interpreting Results:
The most important fields are Tip, Receipt total, Payment Shares, and Rounding adjustment. The tip is the calculated gratuity. Receipt total is the exact amount owed before round-up collection. Payment Shares gives the roster amounts, and rounding adjustment explains any extra collected money.
Do not treat Collected total as the actual bill when round-up mode is active. It is the amount the group gathers after rounding, so a positive adjustment should be returned as change, applied to fees, or used to lower one payer manually.
Before trusting the result, compare Tip base against the receipt's suggested-tip basis and check whether an automatic service charge already appears on the bill.
Worked Examples:
A 48.75 subtotal with 8.25 percent tax and an 18 percent tip on Subtotal before tax produces a Tip of 8.78 and a Receipt total of 61.55. With two people and Exact cents, Payment Shares splits the total as 30.78 and 30.77 because one penny has to land on one row.
A 120.00 subtotal, 8 percent tax, 18.00 service charge, and 20 percent tip on Subtotal plus tax and service charge uses a 147.60 tip base. The Tip is 29.52 and the exact receipt is 177.12. With four people rounded up to 1.00, each person pays 45.00, so Rounding adjustment shows 2.88 extra collected.
If someone enters 0.18 in Tip rate expecting 18 percent, the Receipt Check will not show an unusually high rate, but the Tip will be tiny. Enter 18 for 18 percent.
FAQ:
Should I tip before or after tax?
Use Subtotal before tax when the tip should apply only to food, drink, or service before sales tax. Use Subtotal plus tax only when the receipt suggestion or group agreement uses the taxed amount.
How is a service charge handled?
The Service charge field adds a fixed amount before the final total. It is included in the percentage tip base only when Subtotal plus tax and service charge is selected.
Why did rounding collect extra money?
Round-up modes raise every person's share to the next 0.50 or 1.00 increment. The extra appears as Rounding adjustment, while Receipt total remains the exact bill amount.
Can this split itemized meals?
No. Payment Shares uses an equal split for the whole receipt. Use an itemized bill splitter when people ordered different amounts.
Glossary:
- Tip base
- The receipt amount used for a percentage tip.
- Effective tip rate
- The fixed or calculated tip expressed as a percent of the selected base.
- Service charge
- A fixed charge already included on the receipt before the optional tip.
- Rounding adjustment
- The difference between the exact receipt total and the rounded amount collected from the group.
References:
- Topic no. 761, Tips - withholding and reporting, Internal Revenue Service.