Quick answer: Stock variance is the difference between the inventory your system expects and what you physically count. A recurring or material gap can point to unrecorded waste, receiving errors, recipe inaccuracy or loss, so it needs investigating rather than simply adjusting the count.
When your stock count shows 8 kg of beef and your system says there should be 11 kg, that 3 kg gap is not rounding error. It is AED sitting in a bin, in someone's bag, or in a dish that consumed more than the recipe specified. TajerGo, the UAE-built restaurant operating system that combines POS, inventory, purchasing, Khata, AI insights, and VAT configuration in one platform, logs variance on every count and feeds the data into Ghost Inventory analysis so patterns surface before they become chronic losses.
What is stock variance in a restaurant?
Stock variance (also called inventory shrinkage or stock discrepancy) is the difference between what your inventory system expects you to have on hand and what you physically find when you count. It is expressed in units (kilos, litres, pieces) and often also in AED so you see the financial impact.
Formula:
A positive variance means you have more than expected (unusual, usually a recording error). A negative variance means you have less than expected (more common, and the focus of investigation).
What causes stock variance in a restaurant?
Most variance falls into one of five categories:
| Cause | How it creates variance |
|---|---|
| Unreported wastage | Spoilage or spills discarded without being logged; system still shows the stock |
| Theft | Ingredients leave the premises without being sold or recorded |
| Recipe over-portioning | Kitchen uses 180g when recipe specifies 150g; every sale under-deducts |
| Delivery discrepancy | Supplier delivers 9 kg but the GRN records 10 kg |
| Counting error | Physical count was inaccurate; the variance is in the measurement |
The investigation process is designed to rule these in or out one by one.
How do you investigate a stock variance?
Step 1: Check the magnitude and pattern. There is no universal percentage that is acceptable for every restaurant or ingredient. Re-count an isolated small difference, then investigate any difference that is material to that item's value, repeats on the same ingredient or changes unexpectedly from the normal pattern for that branch.
Step 2: Check for unreported wastage. Look at the wastage log for the period. Is there a legitimate reason for the gap? If an item was spilled or expired and was properly logged, the variance should already be explained. If the wastage log is empty but variance is high, wastage is being discarded without being recorded.
Step 3: Check deliveries. Pull the Goods Received Note (GRN) for every delivery of this ingredient in the period. Does the quantity received match the purchase order? Does it match what the supplier invoiced? A discrepancy here points to a delivery error or recording mistake.
Step 4: Check recipe adherence. Compare theoretical consumption (units sold × recipe quantity) to actual stock movement. If you sold 100 portions of a dish and the recipe says 150g of protein per portion, theoretical consumption is 15 kg. If your stock shows 18 kg used, the kitchen is portioning at 180g per dish. This is recipe variance - not theft, but still costing you money.
Step 5: Consider theft. If Steps 1-4 all come back clean and the variance is large and concentrated on high-value or easily pocketed items, theft is the remaining explanation. Look at who was on shift during the period of the loss and whether the same pattern repeats across different counts.
Worked example: count, recipe and goods-received note
This is an illustrative investigation, not proof of loss. At the end of a period, the system expects 18 kg of chicken: 10 kg opening stock plus a 10 kg goods-received note (GRN), less 40 sold dishes x 50 g recipe consumption. The physical count is 16.5 kg, leaving a 1.5 kg difference.
| Check | What the manager finds | Next action |
|---|---|---|
| Physical count | 16.5 kg after a careful re-count | Keep the count record and unit consistent |
| Recipe use | 40 dishes x 50 g = 2 kg | Check whether portions matched the recipe |
| Goods-received note | The supplier delivery was physically 8.5 kg, but 10 kg was recorded | Correct the receiving record with the supporting delivery evidence |
| Wastage log | No chicken discard recorded | Review only if the GRN does not explain the difference |
Correcting the GRN explains the 1.5 kg in this scenario. If the receiving record is correct, continue with portions, logged waste and other stock movements before treating the difference as unexplained.
What is an acceptable level of stock variance?
There is no universal threshold. Set a documented review trigger by item value, unit of measure, count frequency and the normal variation in your own operation. A recurring difference on a high-value protein may deserve an earlier review than a one-off measurement difference on dry goods; the right trigger is the one your manager can explain and apply consistently.
How does ghost inventory relate to stock variance?
Ghost inventory is a category of stock variance - specifically, stock the system believes exists but which has actually been lost without being recorded. It accumulates because of the same causes as variance (unreported wastage, theft, delivery errors) but has compounded over time to the point where the system's picture of stock is significantly wrong.
TajerGo's Ghost Inventory feature detects this by reconciling sales against actual stock movements. When the system sees that sales imply a certain quantity of an ingredient should have been consumed, but the stock movement shows a larger depletion, it flags the gap as potential ghost inventory - stock that appears to exist in the ledger but probably does not.
What are the best practices to prevent recurring variance?
- Log all wastage at the time it happens. A wastage log that is completed after the fact is unreliable. Every discard should be logged immediately with a reason.
- Train kitchen sections on recipe adherence. Over-portioning is one of the most common sources of variance in restaurants with a new or inconsistent kitchen team. Recipe specs should be posted at each station.
- Verify deliveries against purchase orders. Do not accept and sign off a delivery without checking quantities physically against the PO. A discrepancy accepted at the door becomes permanent variance.
- Run spot counts on high-value items. Do not wait for the weekly full count to discover a large variance on chicken or salmon. Count these items daily.
- Investigate the cause of every variance, not just the correction. Adjusting stock to match the count without understanding why the gap existed means the same loss will recur next week.
How TajerGo can support the review
Use TajerGo's inventory, receiving, recipe and wastage records as the evidence trail for the same review sequence: compare a physical count with recorded stock movements, then review receiving and wastage before drawing a conclusion. Confirm the configured reports, permissions and workflow for your account before relying on a particular automation or audit-export behaviour.
Frequently asked questions
What is stock variance in a restaurant?
Stock variance is the difference between the quantity your inventory system expects and the quantity you physically count. Negative variance (less stock than expected) is the most common and points to unreported wastage, theft, recipe over-portioning, or delivery discrepancies.
How much stock variance is normal in a restaurant?
There is no universal percentage. Set a documented review trigger based on the item's value, unit of measure, count frequency and the normal pattern in your own operation. Repeated or material differences deserve investigation.
How do I find out what is causing my stock variance?
Work through a checklist: check the wastage log, check delivery records against purchase orders, compare theoretical consumption from recipes to actual stock movement, and if all are clean, investigate for theft. Each step rules out a cause and narrows the investigation.
What is the difference between stock variance and ghost inventory?
Stock variance is the gap shown by a single count. Ghost inventory is accumulated variance - stock the system shows as on hand that does not actually exist because of repeated unrecorded losses. Ghost inventory is often discovered when a large variance appears on an item that looked fine in previous counts.
Does recipe over-portioning cause stock variance?
Yes, and it is one of the most common but least investigated causes. If the kitchen consistently portions larger than the recipe specifies, actual ingredient consumption exceeds theoretical consumption. The stock depletes faster than sales account for, creating persistent variance that looks like theft or unrecorded waste.
Read next: Restaurant inventory management UAE: the complete guide (pillar) · How to track wastage in a restaurant kitchen · Ingredient-level vs finished-goods inventory tracking · What is ghost inventory and how to find it