Short answer: here is how to calculate food cost percentage. Take your starting inventory, add everything you bought, subtract your ending inventory, then divide that number by your food sales for the same period and multiply by 100. That gives you the share of every food dollar that goes back out the door as product.
Most owners we work with in the Virgin Islands and Riviera Maya can quote their rent to the dollar and have no idea what their food cost ran last month. That is a problem, because food is usually the second biggest line on the P&L and the one you can actually move in a week. This walks through the math, the two versions of it you need, what a good number looks like, and what to do when yours is ugly.
How to Calculate Food Cost Percentage (the formula)
There is one formula, and it has four inputs:
(Beginning Inventory + Purchases − Ending Inventory) ÷ Food Sales × 100
- Beginning inventory: the dollar value of the food sitting in your walk-in, dry storage, and freezer on day one of the period.
- Purchases: every food invoice you paid during the period. Produce, protein, dry goods, the emergency run to the grocery store when the barge was late.
- Ending inventory: the dollar value of what is left on the last day.
- Food sales: food revenue only for that same window. Not alcohol. Not merch. Not the corkage.
A worked example
Say you run a 40-seat spot on St. Croix. On September 1 you count $9,400 of food in the building. Over the month you pay $24,600 in food invoices. On September 30 you count $8,900. Your POS says you did $103,000 in food sales.
($9,400 + $24,600 − $8,900) = $25,100 in food used.
$25,100 ÷ $103,000 = 0.2437
0.2437 × 100 = 24.4% food cost
That is a healthy number. Now run it with one change: you skip the inventory counts and just divide invoices by sales. $24,600 ÷ $103,000 = 23.9%. Close, but it is wrong, and in a month where you stocked up ahead of a holiday weekend it would be wrong by four or five points. Points are money. On $103,000 in sales, one point is $1,030.
Plate cost is the other half
The period formula tells you how the whole restaurant did. It does not tell you which dish is bleeding. For that you need plate cost, which is simple arithmetic on a single recipe.
Cost every ingredient in a dish at the unit you actually buy it in, add it up, then divide by the menu price. A snapper entree that costs you $8.10 in food and sells for $34 has a 23.8% plate cost. The same kitchen’s burger might cost $4.20 and sell for $19, which is 22.1%. The conch fritters that cost $6.80 and sell for $16 are running 42.5%, and now you know where your month is going.
Do this for your top 15 sellers. That is usually 80% of your covers, and it is a two-hour job that pays for itself the first time you reprice a dish. If you are rethinking prices across the whole menu at the same time, the logic is the same one we use in how to price a vacation rental: know your cost floor first, then price to the market above it, never the other way around.
What is a good food cost percentage?
The honest answer is that it depends on your format, but there are real benchmarks. The National Restaurant Association’s 2025 Restaurant Operations Data Abstract, built from financial data submitted by more than 900 operators, found that food and non-alcohol beverage costs ran a median of 32.0% of sales at fullservice restaurants and 32.4% at limited-service restaurants in 2024.
Size matters more than most owners expect. In the same data, fullservice restaurants doing $2 million or more posted a median 31.0% food cost, while those under $2 million came in at 33.7%. That gap shows up on the bottom line: the bigger group had median pre-tax income of 4.3% of sales, the smaller group 1.1%. Nearly three points of food cost turned into roughly three points of profit.
Rough working targets by format:
- Quick service and counter: 25% to 30%
- Casual and fast casual: 28% to 33%
- Fine dining: 33% to 40%, because you are buying better product and charging for it
- Bar-forward with a small kitchen: food can run high if the liquor margin carries it
Do not chase a number you saw in a blog post. Chase your own trend line. A restaurant at 34% that was at 38% last quarter is winning. A restaurant at 28% that was at 24% has a problem it has not found yet.
Why your number is probably wrong
When we help an operator run this the first time, the answer is almost always off for one of five reasons.
Inventory got skipped. Invoices alone are not food cost. You have to count.
Alcohol got mixed in. Food and beverage are separate calculations with separate targets. Blend them and both numbers become meaningless.
Comps and staff meals are not tracked. That food left inventory and generated no sales. If it is not on a line somewhere, it silently inflates your cost.
The periods do not line up. Sales from the 1st to the 30th, invoices from the 26th to the 25th. Now you are dividing two unrelated numbers.
Waste and theft are invisible. Spoilage in a hot climate is real, and so is the case of steaks that walked. The formula catches the dollars but not the cause. Only a physical count and a waste log tell you which.
How to bring the number down
Once you know how to calculate food cost percentage, the fix list is short and boring, which is why it works.
Count weekly, not monthly. A monthly count tells you what happened. A weekly count lets you catch it while you can still do something.
Reprice the outliers, do not raise everything. Guests notice a menu-wide increase. They rarely notice that one appetizer went from $16 to $18.
Fix portioning before you fix pricing. Scales and standard scoops on your five highest-volume items usually beat any purchasing negotiation.
Cut the dead menu items. Anything selling under a few covers a week is buying you inventory, prep time, and spoilage. Kill it.
Renegotiate freight, not just product. On an island, freight is often the difference between a 26% and a 31% food cost. Consolidating to fewer, larger deliveries usually moves more money than haggling over case price.
Sell more of what already works. A low-cost, high-margin dish that gets a server mention and a spot at the top of the menu can move your blended food cost a full point. That is the same lever we cover in increasing restaurant sales without advertising.
Watch the fees that hit the other side of the equation
Food cost is only one half of the margin story. The other half is what gets taken out of your sales before you see them. Delivery apps are the obvious one, and the math is uglier than most owners realize once you stack it on a 30% food cost. We broke the current rates down in how much DoorDash charges restaurants.
Hotels and villas have the exact same problem wearing a different hat, which is why we built a free OTA commission calculator to show operators what booking platforms actually cost them per year. Same principle: you cannot manage a percentage you have never calculated.
FAQ
How often should I calculate food cost percentage?
Weekly if you can, monthly at minimum. Weekly counts on your top-cost items and a full count monthly is a good compromise for a small kitchen.
Should alcohol be included in food cost percentage?
No. Run beverage cost as its own number. Liquor typically runs 18% to 24%, beer 24% to 30%, and wine 30% to 40%, so blending them into food hides both problems.
My food cost is under 25%. Is that good?
Maybe. A very low food cost can mean tight operations, or it can mean you are underportioning and overpricing relative to your market. Check your review trend and your repeat-guest rate before you celebrate.
Where this fits
Cost control and revenue work are the same job from two directions. Running your food cost tells you what a cover is worth. Filling more covers with guests who come back is the other half, and that is most of what we do for restaurants and small hotels across the islands we work in.
If you want an outside read on where your revenue is leaking, grab the free Direct Booking Diagnostic. No pitch, just the numbers.