Food cost running high but you're not sure why? Here's how to calculate your actual food cost percentage, what the benchmarks are by concept type, and the six places leakage hides.
Food cost percentage is the most watched number in restaurant finance — and also the most misunderstood. Operators obsess over it without always knowing what "normal" looks like for their concept, or where the variance actually comes from.
Here's a clean breakdown: how to calculate it, what the benchmarks are, and the six places food cost leakage hides that most operators miss.
The formula is straightforward: Cost of Goods Sold ÷ Revenue × 100. If you spent $28,000 on food and beverage in a month where you did $80,000 in revenue, your food cost percentage is 35%.
The catch is in what you include in COGS. It should be: beginning inventory + purchases − ending inventory. Most operators just use purchases, which overstates food cost in months where you're building inventory and understates it when you're drawing it down. Do a physical count.
Food cost targets vary significantly by how your concept is structured:
If you're running 5+ points above your category benchmark consistently, it's a structural problem — not a bad month.
The most common culprit. A recipe calls for 6 oz of protein; your line cooks are plating 7–8 oz by feel. On 200 covers a night at $6/lb for protein, that's $200–$400 of cost variance per week that never shows up as "a problem" until you actually measure it.
Prep errors, dropped plates, expired inventory — none of this shows up in your POS. It just disappears from your inventory and increases your food cost mysteriously. A waste log catches this and usually reveals 1–3 percentage points of hidden cost within the first month.
Your distributor raises prices by 3–4% on core items. You don't notice because you're not comparing invoices to last quarter. Three vendors doing this adds up to real margin compression — and it's not on your line cooks, it's on your purchasing process.
Your overall food cost went up, but revenue is flat. Before assuming there's a theft or waste problem, check whether your customers are ordering differently. A shift toward lower-margin items (say, salads instead of pasta) raises your blended food cost even if every unit is prepared perfectly.
Uncomfortable to say, but real. The NRA estimates restaurant theft accounts for 4–6% of revenue annually across the industry. It doesn't show up as a line item — it shows up as unexplained food cost variance that persists over multiple inventory cycles.
Recipes change at the line level without formal updates. A sauce that was supposed to yield 20 portions now yields 16 because someone adjusted the recipe "for taste." Your theoretical food cost says 30%. Your actual food cost says 36%. The gap is recipe drift.
The most powerful analysis in food cost management is comparing your theoretical food cost (what you should have spent based on what you sold, using standard recipes and portions) to your actual food cost (what you actually spent based on inventory). A gap of more than 2–3 percentage points means something is wrong — and the categories above are where to look.
OperatorIQ tracks your food cost percentage month-over-month against category benchmarks, flags when it moves more than 2 points in either direction, and shows you the trend alongside revenue so you can spot drift before it compounds. See the demo →
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