Your inventory records say you have 120 units of a product. The shelf says 112. Which is right? Differences like this are normal, and they matter, because wrong stock figures lead to missed sales, wrong reorders and misleading profit numbers. Regular counting, done properly, is how you keep records and reality in step.
Why counts go wrong
Records and stock drift apart for ordinary reasons: a delivery booked in wrongly, an item picked from the wrong location, a return that was never recorded, breakage that nobody wrote off, or theft. None of these is dramatic on its own. Together they can make a substantial difference over a year, which is why counting is a routine, not a rescue.
Full counts versus cycle counts
A full count means counting everything at once, usually at the end of the year, and often means closing the business for a day. It is thorough but disruptive. A cycle count spreads the work: you count a small part of the stock regularly, so that over a period everything is checked. It is less disruptive, finds problems sooner and lets you investigate causes while they are fresh.
Count the important items more often
Not every item deserves the same attention. A common approach is to sort products by value or sales into groups. The top group, a small number of items that account for most of the value, is counted often, for example monthly. The middle group is counted every quarter, and the long tail twice a year. The exact schedule depends on your business, but the principle holds: spend your effort where errors cost the most.
How to run a good count
- Pause movements in the area being counted, or record them separately, so numbers do not change as you count.
- Count blind where you can, without looking at the system figure first, to avoid bias.
- Use two people for high-value items, or recount anything that differs.
- Count in a set order by location, with labelled shelves and bins, so nothing is missed or counted twice.
- Write it down immediately, using a sheet or a scanning app, not memory.
Work out the variance
The variance is the counted quantity minus the recorded quantity. If the system says 120 and you count 112, the variance is −8, which is about 6.7% of the recorded stock. If each unit costs 12.50, that is a difference of 100 in value. Small variances on cheap items may be acceptable, while the same percentage on an expensive item needs a closer look. Set a tolerance for each group, and investigate anything above it.
Find the cause, not only the number
Before you adjust the records, try to understand the difference. Check recent receipts and shipments, look for items in the wrong place, and review returns and damage. If the same product keeps showing variances, the process around it is probably at fault, such as a confusing label or a similar-looking item. Fixing the cause is worth more than correcting the figure.
An example schedule for a small shop
Imagine a shop with about 400 products. It counts its 20 best-selling and most valuable items every month, a further 100 each quarter, and the remaining 280 twice a year. Counting a few shelves each week takes far less time than a full stocktake, and the shop learns about errors within weeks instead of at year end.
Counting while you are still trading
If you cannot close, count before opening or after closing, or count an area at a time and keep a list of sales and deliveries during the count so you can adjust for them. Returns and damaged goods should be kept apart from sellable stock, with their own record, so they do not blur your numbers.
Adjust the records
Once you are confident in the count, update the system and note the reason, the date and who approved it. A short note makes later reviews far easier. Do not adjust silently, and do not change numbers to make them look tidy.
Measure shrinkage
Shrinkage is the loss between what your records say you should have and what you really have. If the books show 50,000 of stock at cost and the count finds 48,500, you have lost 1,500, which is 3%. That loss flows into your cost of goods sold, so it reduces profit. Tracking the percentage over time shows whether things are improving. See cost of goods sold for how it fits into your accounts.
Make counting easier
Good habits reduce the work. Give each item a clear, consistent code, and each shelf a label, as explained in our SKU system guide. Barcodes and a phone scanning app speed up counting and reduce typing errors; see barcode basics. Receive deliveries promptly and check them against the order, since many errors start at the dock.
Connect counts to the rest of your inventory work
Accurate counts feed everything else: reorder points, turnover and carrying cost figures all depend on correct stock numbers. Our average inventory calculator and guide on inventory turnover are only as reliable as the counts behind them. This guide is general information, so adapt the schedule to your own products.
