Auto-Gratuity Calculator for Large Parties
Calculate the auto-gratuity on a large-party restaurant check. Enter the subtotal, party size, and percent to see the auto-grat, per-guest total, and how the IRS treats the charge versus a tip.
Auto-Gratuity Calculator for Large Parties
Bill Subtotal (pre-tax)
Party Size
Most US venues add auto-gratuity for parties of 6 or 8 and up.
Auto-Gratuity Percent
Calculate Auto-Grat On
Most POS systems compute auto-grat on the pre-tax subtotal. Toggle if your venue includes tax in the base.
Sales Tax (optional)
Leave at 0 if tax isn't shown separately on the receipt.
Additional Voluntary Tip (optional)
Any amount guests add on top is a true tip, not a service charge.
IRS treatment: Auto-gratuity is a service charge under Rev. Rul. 2012-18. Your employer runs it through payroll as W-2 wages (not Box 7 tips), and it does not qualify for the federal No Tax on Tips deduction.
How auto-gratuity works for large parties
Auto-gratuity is a service charge that restaurants add automatically to checks for large groups. The trigger is usually a party of 6 or 8, though some venues set it lower for private events. The percentage almost always falls between 15% and 22%, with 18% and 20% the two most common rates. The charge has to be disclosed on the menu, website, or signage so guests know about it before they order.
Most point-of-sale systems compute auto-grat on the pre-tax subtotal. A smaller number of venues calculate it on the post-tax total, which inflates the gratuity by the tax rate. Use the toggle above to match the method your restaurant uses.
On a $200 check with a party of 8 at 18%, the auto-gratuity is $36.00. Each guest's share of the gratuity alone is $4.50, and the per-guest total (before any sales tax or extra tip) is $29.50.
Common large-party scenarios
| Subtotal | Party | 18% auto-grat | 20% auto-grat | Per-guest at 18% |
|---|---|---|---|---|
| $200 | 8 | $36.00 | $40.00 | $29.50 |
| $300 | 10 | $54.00 | $60.00 | $35.40 |
| $400 | 12 | $72.00 | $80.00 | $39.33 |
| $600 | 15 | $108.00 | $120.00 | $47.20 |
Pre-tax basis, no sales tax, no extra voluntary tip. The per-guest figure is the bill total divided by party size.
Service charge vs. tip: the IRS distinction
The IRS draws a hard line between tips and service charges in Rev. Rul. 2012-18. To count as a tip, a payment has to pass four tests: the customer makes it freely, the customer alone sets the amount, the payment isn't the subject of negotiation, and the customer chooses who gets it. Auto-gratuity fails the first test because it's mandatory, so the IRS classifies the entire amount as a service charge.
That distinction changes everything about how the money is taxed. Service charges are paid out as non-tip wages. They run through payroll, show up in Box 1 of your W-2, and are subject to the same federal and state withholding as your hourly pay, plus Social Security and Medicare. They don't appear in Box 7 (tips).
The One Big Beautiful Bill Act introduced a federal No Tax on Tips deduction, but the OBBBA excludes mandatory service charges and auto-gratuities by name. Voluntary tips qualify. Auto-grat does not, even if it's the largest line on your paycheck. If a guest adds something extra on top of the auto-grat, that voluntary portion is a true tip and follows the normal tip-reporting rules.
Sales tax is another quirk: most states tax mandatory gratuities because they're part of the sale, while purely voluntary tips aren't taxed. Check your state's department of revenue for the exact rule.
Tracking auto-gratuity earnings shift by shift
Because auto-grat hits your paycheck as wages, you should log it separately from cash and card tips. The cleanest approach: enter it under your hourly wage column or as a wage override for that shift, and keep voluntary tips in the tip fields. That way your tip total at the end of the year matches what your employer reports in Box 7, and you can claim the No Tax on Tips deduction on the voluntary portion without overstating it.
The Server44 app has both fields and keeps them separated automatically, so banquet servers and large-party specialists can see real take-home by shift without doing the W-2 versus tip math by hand at year-end. For deeper tipping-side comparisons, see our service charge vs tip calculator and No Tax on Tips calculator.
State and local rules to know
Several states have specific disclosure rules for mandatory gratuity. New York requires the charge to be clearly itemized on the menu and the check. California treats automatic gratuity as a service charge for wage and hour purposes, which affects how it can be distributed to staff. Massachusetts and a handful of other states have similar disclosure requirements.
Distribution rules vary too. In some states a server keeps 100% of the auto-grat; in others the venue can pool a portion to bussers, runners, and bartenders. A few jurisdictions require the venue to inform guests whether the charge goes entirely to staff or is partly retained by the house. If your restaurant pools auto-grat, the math gets closer to a tip pool, so our tip pool share calculator can help.
Estimates only. Not tax or legal advice. Service-charge and tip rules vary by state.
Frequently Asked Questions
Common questions about auto-gratuity calculator for large parties
What is an auto-gratuity and when is it added to my check?
An auto-gratuity (sometimes called auto-grat or mandatory gratuity) is a service charge a restaurant tacks on automatically to large-party checks, most commonly 18-20% for parties of 6, 8, or more. The point is to guarantee the server a fair tip on big tables, where split checks and short tips are common. The trigger party size and percentage are set by the venue, and they should be disclosed on the menu, website, or signage.
Is auto-gratuity the same as a tip?
No. Under IRS Rev. Rul. 2012-18, a payment only counts as a tip when the customer freely chooses to pay it, decides the amount, and chooses who receives it. Auto-gratuity fails the free-choice test because it's mandatory, so the IRS classifies it as a service charge, not a tip. See our service charge vs tip calculator for a side-by-side take-home comparison.
How is auto-gratuity taxed differently than tips on a W-2?
Service charges are paid out as non-tip wages. They run through payroll, show up in Box 1 wages on your W-2, and are subject to standard federal and state withholding plus Social Security and Medicare, just like your hourly pay. They aren't reported in Box 7 (tips). Voluntary tips on top of the auto-grat are still tips and follow normal tip-reporting rules.
Does the federal No Tax on Tips deduction apply to auto-gratuity?
No. The federal No Tax on Tips deduction introduced by the One Big Beautiful Bill Act (OBBBA) applies only to voluntary tips that meet the IRS definition. Mandatory auto-gratuities and service charges are explicitly excluded. Our No Tax on Tips calculator shows what qualifies and how the deduction is figured.
Is auto-gratuity mandatory, or can guests refuse to pay it?
When the charge is disclosed up front on the menu, website, or signage, auto-gratuity is generally enforceable. Some states require pre-order disclosure. A few jurisdictions let guests dispute or remove the charge, but the burden is on the restaurant to prove it disclosed the policy before service.
What party size triggers auto-gratuity at most restaurants?
Six or eight is the most common threshold, but some venues set it as low as 5 or apply it only to private events and prix-fixe menus. The percentage is usually 18-20%, with banquets and resorts sometimes charging 22-25%.
How should I track auto-gratuity earnings?
Because auto-grat hits your paycheck as wages, not tips, log it under your hourly wage or as a wage override for that shift rather than in the cash or card tip fields. Track any voluntary tips guests add on top separately so the tip side of your earnings stays clean for tax reporting. The Server44 app has both fields and keeps them straight for you.
Can auto-gratuity be more than 18%?
Yes. There's no federal cap. Most US restaurants land between 15% and 22%, with 18% the most common starting point. Cruise ships, resorts, and banquet contracts often go higher, sometimes 22-25%, with the higher amount typically split between the server and the house.