The short answer
This guide is about tipping in the United States, where the tip is part of how servers get paid. Norms are different elsewhere, and we cover that briefly at the end.
- Self-serve buffet: about 10% of the pre-tax bill, the figure the Emily Post Institute gives for buffet wait service.
- Ordered-to-table AYCE (Korean BBQ, hotpot, AYCE sushi): treat it as a sit-down meal, which Emily Post puts at 15 to 20% of the pre-tax bill.
- Brazilian steakhouse: the same 15 to 20%. Fogo de Chao's FAQ says gratuity is not included in its prices.
- Large party: look for an automatic gratuity on the bill first. If it is there, the tip is already paid.
Whatever you tip, it raises the bill you are trying to eat back. At a $34.99 Korean BBQ dinner, tax and an 18% tip cost about one extra plate of premium beef. The full table is below.
Self-serve buffet vs ordered-to-table AYCE
"All-you-can-eat" covers two very different kinds of service, and the tip follows the service.
Self-serve buffets
At a classic buffet you walk the line and fill your own plate. A server may still bring drinks, clear plates and reset the table. The Salty Waitress at The Takeout (June 2018) calls 10% the standard buffet tip, notes that some servers only bring drinks while others clear and check on you, and says tips are sometimes shared with the runners who refill the trays.
Her advice for the low-service case: if you refill your own drinks and nobody clears your plates, you can tip a bit less, but still leave something for the work you do not see, like stocking forks and napkins and resetting tables. If the server is great, leave a few extra dollars.
Ordered-to-table AYCE
Korean BBQ, hotpot and most AYCE sushi work the other way. You order from a menu and a server brings every plate, round after round, along with grill changes, broth refills and drinks. That is a sit-down meal with more trips to the table than most, so our read is that the sit-down range is the right one: 15 to 20%. The AYCE price buys you the food. It does not change how much work goes into bringing it.
A Korean BBQ table can easily run three or four rounds. Our Korean BBQ guide lays out a round-by-round plan, and every one of those rounds is a server trip.
Brazilian steakhouses
At a churrascaria, gauchos carve meat at your table while a server handles drinks, sides and the bill. Mashed (updated January 2024) advises following the local custom of 15 to 20% at dinner in the US rather than Brazil's customary 10%, and notes you might want to tip generously since the gauchos are putting on a show. It also tells groups to check beforehand whether a tip will be added automatically. Fogo de Chao's FAQ lists gratuity among the things not included in its price, along with tax, drinks and dessert. Our Brazilian steakhouse guide covers the rest of that bill.
Tipping by format
| Format | Who serves you | Typical tip | Basis |
|---|---|---|---|
| Self-serve buffet | You plate it; a server brings drinks and clears | 10% | Emily Post; The Takeout |
| Buffet, minimal service | You refill drinks, nobody clears | A bit under 10%, not zero | The Takeout |
| Korean BBQ, hotpot, AYCE sushi | A server brings every plate | 15 to 20% | Emily Post sit-down range |
| Brazilian steakhouse | Gauchos carve, a server does the rest | 15 to 20% | Mashed, 2024 |
| Large party with automatic gratuity | Any | Already on the bill | Read your check |
The ordered-to-table row is our application of the sit-down range, not a separate ruling from an etiquette source. If service is poor or exceptional, adjust, as both Emily Post's ranges and Mashed's advice allow.
Automatic gratuity for large parties
Many restaurants add a set percentage to the bill for big tables. Here is one AYCE example: the KPOT Rogers group booking page (checked October 2026) says every booking, which needs 12 or more guests, includes an 18% gratuity because of large party status. Thresholds and rates vary by restaurant, so check the menu, the booking terms or the bottom of the check.
Two things are worth knowing:
- It is a charge, not a tip. The IRS's tip recordkeeping page says a payment is a tip only if the customer decides to pay it and chooses the amount, and it gives "a mandatory 18% charge for large parties" as an example of a service charge. If you add money on top, only that extra is a tip.
- Do not tip twice by accident. When the gratuity is already on the bill, the tip line on the card slip is for anything extra you want to add. Leave it blank or write a dash if you are done.
Splitting a big check has its own problems, from who pays for the kids to who ordered the soju. Our guide to all-you-can-eat with a group covers that.
Tip on pre-tax or post-tax?
Emily Post lists both the sit-down tip and the buffet tip as a percentage of the pre-tax bill. Sales tax goes to the government, not the restaurant, so the server's work is the same whether your city charges 6% or 10%. Tipping on the after-tax total is generous, and nobody will complain, but it is not the standard.
On an AYCE bill the difference is small. On a $34.99 dinner with 9% tax, a 20% tip is $7.00 on the pre-tax price and $7.63 on the post-tax total. That is 63 cents, about a fifth of a bowl of rice. The buffet calculator figures the tip on the pre-tax price.
How tax and tip change your break-even
Plate Debt's break-even math is simple: (price + tax + tip) ÷ value per plate, rounded up. The tip is part of what you paid, so it is part of what you have to eat back.
The table uses the same numbers as the calculator: the average Plate Debt estimated a la carte value of the five most and five least valuable dishes for each format, and example prices that are not any restaurant's real price. Every row uses 9% sales tax, with the tip figured on the pre-tax price at the rate from the table above.
| Format and example price | Tip | Real bill | Premium plates, before → after | Filler plates, before → after |
|---|---|---|---|---|
| American buffet, $19.99 | 10% | $23.79 | 2 → 2 | 8 → 10 |
| AYCE hotpot, $32.99 | 18% | $41.90 | 2 → 3 | 11 → 14 |
| Korean BBQ, $34.99 | 18% | $44.44 | 2 → 3 | 11 → 14 |
| Brazilian steakhouse, $58.99 | 18% | $74.92 | 5 → 6 | 16 → 20 |
Premium averages: $13.10 a plate at an American buffet, $18.60 for hotpot, $18.20 for Korean BBQ and $13.80 per skewer serving at a Brazilian steakhouse. Filler averages: $2.60, $3.05, $3.25 and $3.85.
If you eat premium, tax and tip cost you about one plate. If you fill up on rice, rolls and noodles, they cost you three or four. The cheaper the food you eat, the more the tip hurts.
Here is that Korean BBQ dinner plate by plate, with tax and tip included.
3 plates worth $52.00 against a $44.44 bill. Paid off on plate 3, $7.56 ahead.
- $18.50Galbi
- $18Ribeye
- $15.50Beef brisket
Without tax and tip, the galbi and ribeye alone are worth $36.50 and cover the $34.99 sticker price in two plates. Add tax and tip and the same two plates leave you $7.94 short, so the brisket is what gets you to PAID.
Here is how much each tip rate moves the same $34.99 dinner, with 9% tax.
| Tip | Real bill | Premium plates ($18.20) | Filler plates ($3.25) |
|---|---|---|---|
| No tax, no tip | $34.99 | 2 | 11 |
| Tax only | $38.14 | 3 | 12 |
| 10% | $41.64 | 3 | 13 |
| 15% | $43.39 | 3 | 14 |
| 18% | $44.44 | 3 | 14 |
| 20% | $45.14 | 3 | 14 |
| 20% on the post-tax total | $45.77 | 3 | 15 |
Notice that the jump from 15% to 20% does not add a premium plate. The step that matters most is tax, which pushes you past two plates. So tip the server fairly and win it back at the grill, not by shaving the tip. The full formula for every format is in Is all-you-can-eat worth it?
In the Plate Debt app, you enter what you paid. Enter the amount with tax and tip included and your plate debt is the real one, not the sticker price.
Outside the US
Everything above is US practice. In Japan, the national tourism organization's tipping page says it is not common to tip at restaurants, and Marketplace (September 2023) reported that South Korea is a place where you are not expected to leave a tip. If you are traveling, check local custom before you add 18% out of habit.
Sources
- Emily Post Institute, "General Tipping Guide", emilypost.com, checked October 14, 2026.
- The Salty Waitress, "Ask The Salty Waitress: How Much Should I Tip At A Buffet?", The Takeout, June 4, 2018.
- Nads Willow, "Etiquette Rules You Should Always Follow At A Brazilian Steakhouse", Mashed, updated January 31, 2024.
- Fogo de Chao, FAQ, checked October 14, 2026.
- KPOT Rogers, group booking page, checked October 14, 2026.
- Internal Revenue Service, "Tip recordkeeping and reporting", last reviewed July 31, 2026.
- Japan National Tourism Organization, "Tipping in Japan", japan.travel, checked October 14, 2026.
- David Brancaccio, Meredith Garretson Morbey and Olie D'Albertanson, "A debate over tipping comes to South Korea", Marketplace, September 20, 2023.
FAQ
How much should you tip at a buffet?
In the US, the Emily Post Institute puts buffet wait service at 10% of the pre-tax bill. That covers the server who brings drinks and clears your plates. If you also refill your own drinks and nobody clears the table, The Takeout's Salty Waitress says tipping a bit less is fair, but still leave something.
Do you tip at all-you-can-eat Korean BBQ?
Yes, in the US. At ordered-to-table AYCE like Korean BBQ, hotpot and AYCE sushi, a server brings every plate, so it works like a sit-down meal. Emily Post's sit-down range is 15 to 20% of the pre-tax bill.
Should you tip on the pre-tax or post-tax amount?
Emily Post figures both the sit-down and the buffet tip on the pre-tax total. Tipping on the total after tax is generous, not required. On a $34.99 meal with 9% tax, a 20% tip on the post-tax total adds only about 63 cents.
Do you tip on top of an automatic gratuity?
You do not have to. An automatic gratuity is already the tip for the table. The IRS treats a mandatory charge, such as an 18% charge for a large party, as a service charge, and only money you add voluntarily on top counts as a tip. Read the bill before you sign so you do not tip twice.
How does the tip change how much I need to eat at all-you-can-eat?
The tip is part of your bill, so it is part of what you eat back. At a $34.99 Korean BBQ dinner, 9% tax and an 18% tip raise the bill to $44.44. That adds one plate of premium beef, from 2 to 3, or three plates of filler, from 11 to 14.
Do you tip at all-you-can-eat in Japan or Korea?
Usually not. Japan's national tourism organization says it is not common to tip in restaurants there, and Marketplace reported in 2023 that South Korea is a place where you are not expected to leave a tip.