Restaurant Finance

How To Calculate Food Cost Percentage

Food cost percentage tells you what share of your food revenue goes toward ingredients. This guide walks through every step — inventory counts, purchase totals, the COGS formula, and how to interpret and improve your number.

3 min read Updated 6/9/2026
Quick answer

Food cost percentage = (Cost of Goods Sold ÷ Food Revenue) × 100, where COGS = Beginning Inventory + Purchases − Ending Inventory. Most full-service restaurants target a range of 28–35%, though the right benchmark depends on your concept and price point.

Key takeaways

  • The formula is: Food Cost % = (COGS ÷ Food Revenue) × 100, where COGS = Beginning Inventory + Purchases − Ending Inventory.
  • Accurate physical inventory counts — consistent method, consistent timing — are the foundation of a trustworthy result.
  • Most full-service restaurants target 28–35%, but your right benchmark depends on concept, price point, and beverage mix.
  • The gap between theoretical (recipe-calculated) and actual food cost reveals where money is leaking — portioning, waste, theft, or pricing lag.
  • Track weekly or bi-weekly so you catch problems while they are still small and correctable.
  • A lower food cost percentage is not always better — it can indicate under-portioning that harms the guest experience.

Steps

  1. 1
    Define your time period
    Pick a consistent window — weekly, bi-weekly, or monthly. Shorter periods catch problems faster; monthly periods smooth out delivery timing. Whatever you choose, stick to it so results are comparable over time. Your beginning inventory date and ending inventory date must bookend this window exactly.
  2. 2
    Count beginning inventory
    Walk every storage area — walk-in cooler, dry store, freezer, bar back — and record the quantity and unit cost of every ingredient on hand at the start of the period. Multiply quantity × unit cost for each item and sum the totals. This is your **Beginning Inventory (BI)** value. Consistency in units (kilograms, litres, cases) matters more than precision to the gram — just be consistent across all counts.
  3. 3
    Track all purchases during the period
    Collect every supplier invoice received during the period. Sum the total food cost on those invoices — this is your **Purchases (P)** figure. Include deliveries you paid for but not yet received only if your accounting method accrues them; otherwise use invoice date. Exclude non-food items (cleaning supplies, paper goods) from this total.
  4. 4
    Count ending inventory
    At the close of the period, repeat the same physical count using the same method and unit costs. This is your **Ending Inventory (EI)**. Consistency between your beginning and ending count methodology is critical — if you count half-used containers differently at each count, your COGS will be distorted.
  5. 5
    Calculate Cost of Goods Sold (COGS)
    Apply the standard COGS formula: **COGS = Beginning Inventory + Purchases − Ending Inventory** Example: BI = 4,200, Purchases = 11,500, EI = 3,800 → COGS = 4,200 + 11,500 − 3,800 = **11,900** This figure represents the cost of food actually consumed (sold, wasted, comped, or stolen) during the period.
  6. 6
    Pull your food revenue for the same period
    From your POS or accounting system, extract total **food sales** (excluding beverages, if you track them separately) for the exact same date range. Use net sales — after discounts — not gross ring totals, since discounted items were not sold at full price.
  7. 7
    Apply the food cost percentage formula
    Divide COGS by food revenue and multiply by 100: **Food Cost % = (COGS ÷ Food Revenue) × 100** Using the example above, if food revenue = 38,000: (11,900 ÷ 38,000) × 100 = **31.3%** This means roughly 31 cents of every food-revenue dollar went toward ingredient cost.
  8. 8
    Interpret your result against a target
    There is no single universal target — food cost percentage varies by concept. Fast-casual and counter-service operations often run leaner (25–30%) because labour is lower and menus are simpler. Full-service restaurants commonly land between 28–35%. Fine dining may run higher on food cost while earning it back on price and beverage margin. Compare your result to your own **theoretical food cost** (what your recipes say it should cost at ideal portion and zero waste) — the gap between actual and theoretical reveals where money is leaking.
  9. 9
    Identify variances and take action
    A food cost percentage that is higher than target typically traces to one or more of: over-portioning, unmeasured waste, spoilage, supplier price increases, theft, or inaccurate inventory counts. Drill into each category: spot-check portion weights, review waste logs, compare current invoice prices to menu-costed prices, and verify inventory count accuracy. Reduce food cost by tightening portion standards, adjusting menu prices on high-cost items, renegotiating supplier contracts, or redesigning dishes around lower-cost ingredients without sacrificing quality.

The Formula at a Glance

Two equations drive the entire calculation:

Step 1 — COGS:

COGS = Beginning Inventory + Purchases − Ending Inventory

Step 2 — Food Cost %:

Food Cost % = (COGS ÷ Food Revenue) × 100

Everything else in this guide is about getting accurate inputs into those two equations. Garbage in, garbage out — a sloppy inventory count produces a meaningless percentage.

Why Food Cost Percentage Is Worth Tracking Weekly

Food cost is typically a restaurant's second-largest expense after labour. A percentage point of food cost on a meaningful revenue base can represent thousands of dollars per year. Tracking weekly rather than monthly gives you a shorter lag between a problem developing (a new supplier raising prices, a prep cook over-portioning) and you catching it.

Many operators find that their food cost percentage drifts upward gradually and invisibly — portion sizes creep, waste goes unlogged, and menu prices lag ingredient inflation. A consistent weekly or bi-weekly calculation keeps these forces visible.

Theoretical vs. Actual: Where the Real Insight Lives

Theoretical food cost is what your recipes say it should cost at perfect portioning, zero waste, and current ingredient prices. You calculate it by multiplying each menu item's recipe cost by how many of that item you sold during the period.

Actual food cost is what your inventory math says you actually spent (COGS).

The gap between theoretical and actual is called variance. A variance of 1–2 percentage points is normal and accounts for unavoidable waste (trim, mis-fires, staff meals). A variance of 4 points or more signals a systemic problem worth investigating:

  • Portioning errors — are kitchen staff using scales and standard scoops?
  • Recipe drift — are dishes being made differently from the costed recipe?
  • Spoilage — is ordering aligned with real par levels?
  • Theft — does the variance spike on certain shifts or stations?
  • Comps and voids — are these being tracked and removed from the sales denominator?

POS systems and inventory management platforms (including Restora 360's built-in tools) can automate the theoretical cost calculation once recipes are entered, making variance analysis a routine report rather than a manual project.

Common Mistakes That Skew Your Number

  • Mixing beverage and food revenue — if you track food and beverage purchases together but split revenue, your percentage will be meaningless. Separate them from the start.
  • Forgetting transfers between outlets — if the bar uses lemons purchased on the kitchen invoice, that cost should transfer to the bar's food cost, not distort the kitchen's.
  • Inconsistent count units — valuing a partial case as a full case one week and by the unit the next inflates variance artificially.
  • Including non-food purchases in COGS — cleaning chemicals and takeaway packaging are operating costs, not food costs.
  • Counting inventory at different times of day — count always at the same point (typically after close, before the next day's deliveries arrive).

Turning the Percentage Into Action

Knowing the number is step one. Acting on it is where margin is recovered.

If food cost is above target:

  • Audit your five highest-cost menu items against their theoretical cost
  • Spot-check portion weights on proteins (typically the largest cost driver)
  • Review the past month's waste log — if there is no waste log, create one
  • Pull supplier invoices and compare current per-unit prices to what was used when you priced the menu
  • Check whether staff meals and comped dishes are being tracked and excluded from the sales denominator

If food cost looks suspiciously low:

  • Verify the inventory count was not missed or understated at period end
  • Confirm all invoices for the period were captured
  • Check whether a large delivery arrived just after the period closed

Structural fixes that compound over time:

  • Standardize recipes with written specs and photos so portion decisions are not left to individual judgment
  • Set re-order points based on actual usage data rather than habit
  • Review menu pricing whenever key ingredient costs shift more than 10–15%
  • Run the food cost calculation every week, even roughly, so trends surface before they become crises

Summary

Food cost percentage is calculated by dividing Cost of Goods Sold (Beginning Inventory + Purchases − Ending Inventory) by food revenue, then multiplying by 100. Accurate, consistent inventory counts are the foundation; comparing actual results to your theoretical (recipe-based) cost reveals where margin is leaking. Track weekly, benchmark against your own concept's targets, and use variance analysis to drive specific corrective actions on portioning, waste, pricing, and supplier costs.

Frequently asked

  • It varies by concept. Fast-casual and quick-service operations often run 25–30%, while full-service restaurants commonly land between 28–35%. Fine dining may run higher on food cost while compensating through premium pricing and beverage margin. The more useful benchmark is your own theoretical food cost — the gap between that and your actual result tells you where to focus.

Data & sources

  • Restora 360 editorial — AI-assisted, human-reviewedAI-assisted

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