Your food cost is running 34%. Your target is 30%. That 4-point gap on $50,000/month in food purchases represents $2,000/month — $24,000/year — bleeding out of your operation. But where is it going?
The answer is always one (or a combination) of three things: purchasing inflation (you're paying more for the same products), waste (you're buying product that ends up in the trash instead of on plates), or theft (product is leaving the building without generating revenue). Each cause has a different fix, and misdiagnosing the problem wastes time and money.
This guide gives you the diagnostic framework to figure out which problem you have — and the specific actions to fix it.
What Should Your Food Cost Be?
- Quick Service Restaurants (QSR): 25–32% depending on menu mix
- Fast Casual: 28–35%
- Casual Dining: 28–35%
- Fine Dining: 30–40% (higher quality ingredients)
- Pizza: 25–30% (dough and cheese are cheap relative to revenue)
If you're 3+ percentage points above your format's benchmark consistently (not just one week), you have a structural problem.
The Three Causes of High Food Cost
Cause 1: Purchasing (You're Paying Too Much)
The simplest explanation: your vendors raised prices and your menu prices didn't follow. 91% of QSR operators report higher food costs (Connors Group), and much of it is genuine input cost inflation — chicken, beef, dairy, and produce prices have all increased significantly.
Diagnostic steps:
- Pull invoices for your top 20 items by dollar volume for the last 6 months
- Calculate price change per unit: has chicken breast gone from $2.80/lb to $3.40/lb?
- Multiply the unit price increase by your volume to quantify the total purchasing increase
- Compare against your menu price increases over the same period
Fix: Renegotiate vendor contracts, get competitive bids, adjust menu prices, or reformulate recipes to use lower-cost alternatives. This is the easiest diagnosis and the most straightforward fix.
Cause 2: Waste (You're Throwing Money in the Trash)
Food waste comes in three forms: overproduction (making more than you sell), spoilage (product expiring before use), and improper preparation (burning, dropping, or incorrectly portioning food).
Diagnostic steps:
- Implement a waste log: every item thrown away gets recorded with date, item, quantity, and reason (overproduction, expired, prepared incorrectly)
- Track waste as a percentage of purchases for 2 weeks
- Compare waste volume against prep schedules: are you making 50 sandwiches when you sell 30?
Fix: Reduce prep quantities based on historical sales data, implement FIFO (First In, First Out) inventory rotation, improve portion control with measuring tools and standardized recipes, and train staff on proper food storage.
Cause 3: Theft (Product Is Walking Out the Door)
This is the cause restaurant operators are most reluctant to investigate — and statistically the most common. Internal food theft takes many forms:
- Employee meals: Unauthorized food consumption during shifts ("sampling" that's really eating)
- Take-home theft: Employees making meals at closing time and taking them home. The classic "closing shift special."
- Off-ticket production: Making food for friends/family without ringing it up. The kitchen produces the food, the ingredients are consumed, but no sale is recorded.
- Vendor collusion: An employee accepts a delivery without verifying quantities, and the delivery driver shorts the order by a case or two per delivery.
- Back-door removal: Bulk product (cases of chicken, boxes of produce) removed through the back door during shift changes or closing.
Diagnostic steps:
- Compare theoretical food cost (what POS says you should have used based on sales) vs. actual food cost (what you actually purchased). A gap = missing product.
- Check if the gap concentrates on specific shifts (closing shifts are the #1 theft window)
- Review back-of-house camera footage during closing, shift changes, and delivery receiving
- Track high-value items (proteins, alcohol) individually — these are the most commonly stolen categories
The Diagnostic Decision Tree
- Step 1: Calculate your actual food cost percentage — Total food purchases ÷ Total food revenue for the last 30 days
- Step 2: Compare to your theoretical food cost — POS-based recipe cost × sales mix = what you should have spent. If theoretical is 29% and actual is 34%, you have 5 points of unexplained cost.
- Step 3: Verify vendor pricing — If vendor prices account for 2 of those 5 points, you have 3 points still unexplained.
- Step 4: Quantify waste — If your waste log accounts for 1 point, you have 2 points still unexplained.
- Step 5: The remainder is likely theft — 2 unexplained percentage points on $50,000/month in food cost = $1,000/month = $12,000/year walking out the door.
Your Action Plan
Week 1: Data Gathering
- Calculate actual vs. theoretical food cost for the last 30 days
- Pull vendor invoices for top 20 items and check for price increases
- Start a waste log (even a simple paper one)
Week 2: Analysis
- Quantify how much of the food cost gap is purchasing, waste, and unexplained
- Review back-of-house camera footage for closing shifts
- Check receiving procedures against vendor invoices
Week 3: Action
- Address purchasing: renegotiate contracts or raise menu prices
- Address waste: reduce prep quantities, improve FIFO, portion control training
- Address theft: implement video audit, tighten back-door controls, verify deliveries
Week 4: Measure
- Recalculate food cost for the most recent 7 days
- Compare against pre-investigation baseline
- Identify which interventions had the most impact
If the unexplained gap persists after addressing purchasing and waste, your problem is almost certainly internal theft — and a professional daily video audit is the fastest path to identifying and stopping it.