Food cost by cuisine
Diner food cost percentage
Low ticket, generous plate, and a menu whose two largest exposures — eggs and coffee — happen to be the most volatile and the most freely given away on this list.
This is the numbers page
Bands, one plate costed to the packaging, and the commodities that plate is exposed to. No general costing advice — that lives in the guides, and the two most relevant to a diner are linked at the foot of this page.
The cost structure of a diner
Planning conventions, not research findings — the ranges an operator budgets against. Use them to sanity-check your own arithmetic, never as evidence about the industry.
| Food cost | 28–34% |
|---|---|
| Labour | 30–36% |
| Prime cost target | 62–68% |
| Implied by the two bands above | 58–70% |
The target is 2 points tighter than the two bands added together, which is the real operating constraint: run both food and labour at the top of their ranges and a diner misses its prime cost ceiling. One of the two has to sit below its high end all year, and which one is a strategy choice rather than an accident.
A diner's value proposition is a full plate at a low price, so the food cost band sits high by design. Long opening hours across breakfast, lunch and dinner mean labour is staffed for a full day rather than for two peaks, which puts that band high too. The result is the tightest prime cost on this page and the smallest tolerance for portion drift — there is nowhere for four stray points to hide.
One plate, costed line by line
All-day breakfast plate with bottomless drip coffee included, table service. Line prices are inputs we chose — plausible mid-2026 wholesale figures, not quotes. Replace them with yours and every number below recalculates on the same arithmetic.
| Line | Portion | Cost | Share of plate |
|---|---|---|---|
| EggstrackedThe most volatile of the ten tracked series — this line has doubled before and will again. | 2 | $0.62 | 24% |
| Bacontracked | 3 slices, 2.4 oz raw | $0.93 | 36% |
| Hash browns | 5 oz | $0.24 | 9% |
| Toasttracked | 2 slices | $0.22 | 9% |
| Butter, jam, condiment allowancetrackedA Q factor line: real product, no recipe card. | per cover | $0.24 | 9% |
| Bottomless drip coffeetrackedRefills are an ingredient. Costed at an average cups-per-cover, not one cup. | 2.4 cups average | $0.31 | 12% |
| Plate cost | $2.56 | ||
Food cost
28.6%
$2.56 ÷ $8.95
Contribution margin
$6.39
per plate sold
Against the band
Inside the planning band.
band 28–34%
Inside the band, with two of the six lines — condiments and refills — appearing on no recipe card in most diners. Leave them off and the plate looks roughly six points cheaper than it is, which is exactly how a format with a tight prime cost target loses the year.
What the last 12 months did to this plate
A model, not a measurement: the lines above that map to a tracked commodity, repriced to what they would have cost a year ago if each had moved exactly with its Bureau of Labor Statistics series. Untagged lines are held flat. Real invoices move by more or less than a national average — this shows which lines carry the risk, not what you paid.
| Line | Tracked series | 12-month move | A year ago | Today |
|---|---|---|---|---|
| Eggs | Eggs | −39.2% | $1.02 | $0.62 |
| Bacon | Bacon | −7.5% | $1.01 | $0.93 |
| Toast | Flour | −2.5% | $0.23 | $0.22 |
| Butter, jam, condiment allowance | Butter | −18.2% | $0.29 | $0.24 |
| Bottomless drip coffee | Coffee | +10.7% | $0.28 | $0.31 |
| Whole plate, modelled | $3.06 | $2.56 | ||
| Food cost at $8.95 | 34.2% | 28.6% | ||
Tracked lines moved this plate by −$0.50 over twelve months — a saving you keep on every one sold, unless the menu price moved with it. Series and methodology on the index methodology page.
Three traps specific to this format
1
Bottomless anything, uncosted
Free refills are a portion decision made by the guest. The only way to price them is to measure cups per cover for two weeks and carry the average on the plate — a diner that costs one cup and pours 2.4 has understated its coffee spend by 140%.
2
Egg volatility against a fixed low price
Eggs are the fastest-moving commodity a diner buys and the hardest item to reprice, because a breakfast plate's price is part of the format's promise. The realistic defence is not a price rise but a menu one: know which plates carry three eggs and which carry two, and know what each is worth before the market moves. See price creep.
3
A menu too big to cost
Diner menus run to a hundred and fifty items and cross-use is enormous, which means nobody costs them and everyone guesses. Cost the top twenty by menu mix and you have covered most of your revenue; the long tail can wait, but it should not be invisible.
What a diner is exposed to
Of the ten commodities we track from Bureau of Labor Statistics data, these are the ones that decide this format's food cost. Prices are US city averages, monthly, and we publish nothing that is estimated rather than measured.
Eggs
$2.19/dozen
−39.2% over 12 months
The signature ingredient and the most volatile series tracked here. An avian influenza season can double this line while the menu price stays exactly where the room expects it.
Eggs prices and menu impact →Bacon
$6.58/lb
−7.5% over 12 months
On the plate above, in the club sandwich, in the burger and on the side board. Heavy cook loss and heavy usage together make it the second real exposure.
Bacon prices and menu impact →Coffee
$9.32/lb
+10.7% over 12 months
Refills turn a high-margin drink into a per-cover allowance. A diner is the one format where a coffee price move genuinely lands, because the pour is not capped by a price.
Coffee prices and menu impact →Butter
$3.92/lb
−18.2% over 12 months
Toast, the griddle and every table caddy. The classic uncosted item, used in a format that cannot afford uncosted items.
Butter prices and menu impact →Our plate is a worked example. Yours is the one that pays the rent.
Photograph your menu and every dish comes back costed from your own supplier invoices — the same line-by-line arithmetic as the table above, recomputed the day a price moves, with the invoice line attached to the dish it changed.