Inventory6 min readUpdated By the StockỌja team
What is inventory management?
Short answer
Inventory management is knowing what stock you have, where it is, what it cost and when to buy more, and keeping that knowledge accurate as you sell, receive and move goods. For a shop it comes down to a few numbers per product: how many are on hand, how many are available to sell, the level at which to reorder, and what the stock is worth.
Inventory, stock: the same thing
"Inventory" and "stock" are used interchangeably. Both mean the goods you hold to sell. Inventory management (or stock management) is the set of habits and tools that keep your record of those goods in line with what is actually on your shelves.
It sounds simple, and for a market stall with ten products it is. It becomes hard as the number of products grows, as sizes and colours multiply, as more than one person sells, and as stock sits in more than one place.
The numbers that matter
You do not need accounting jargon. Five numbers per product cover most decisions:
- On hand: how many are physically in the shop or branch.
- Reserved: how many are promised to customers but not yet collected, for example online orders waiting for pickup.
- Available: on hand minus reserved. This is what you can actually sell.
- Reorder (low-stock) level: the point at which you should buy more, set so you do not run out before the new stock arrives.
- Stock value: quantity multiplied by what you paid (cost price). It tells you how much money is sitting on your shelves.
What changes stock
Every change to your stock is one of a few kinds of movement. Good inventory management records each one when it happens:
| Movement | Effect | Example |
|---|---|---|
| Sale | Down | A customer buys two phone cases |
| Receipt | Up | A supplier delivers 20 power banks |
| Return | Up | A customer brings back an unused item |
| Transfer | Down here, up there | Five units move from the main shop to a branch |
| Adjustment | Either way | A count finds two damaged items |
If any of these happen without being recorded, the record drifts from reality. That is why systems that record sales automatically at the till are more accurate than ones that rely on someone writing things down later.
Common ways to manage inventory
A notebook works for very small ranges and one person. It is free and familiar, but it cannot add up, does not warn you about low stock and is easy to lose.
A spreadsheet adds totals and sorting, but someone has to update it after every sale, it breaks when several people edit it, and it knows nothing about sales or money. See how to manage inventory without Excel.
Inventory management software records movements as they happen: a sale at the till reduces stock, a delivery increases it. The better ones connect stock to sales, purchasing and an online store so nothing is entered twice. That is what StockỌja inventory management does.
Good habits, whatever tool you use
- 1
One record of each product
Use the same name and code for an item everywhere, and use variants for sizes and colours rather than separate entries.
- 2
Record movements when they happen
A sale is recorded at the sale, a delivery when it arrives. Not at the end of the week.
- 3
Set reorder levels
Higher for fast sellers and long supplier lead times, lower for slow items.
- 4
Count regularly
Count one category a week rather than everything once a year. Record differences with a reason.
- 5
Keep cost prices
Without them you can see sales but not profit or stock value.
When to move beyond a notebook
Move to a system when you regularly cannot answer "do we have it?" without checking the shelf, when stock goes missing and you cannot say when, when someone else sells for you, or when you start selling online as well as in person. Our guide on choosing inventory management software lists what to look for.
Where StockỌja fits
- ProductInventory management Stock levels per branch, low-stock alerts, variants, transfers and a full history behind every number.
- GuideHow to track stock in a small business A practical routine for knowing what you have, stopping stock from going missing and doing it from your phone.
- GuideHow to choose inventory management software A checklist of what matters for a shop: variants, branches, the till, online selling, staff, cost and support.
- ProductPoint of sale A fast counter for busy hours: scan or search, cash, card, transfer or split payments, receipts, and it keeps selling offline.
- ProductProduct catalogue Products, variants, categories, brands, photos, SKUs and barcodes, imported from CSV and shared by every branch.
- GuideHow to manage inventory without Excel Why stock spreadsheets break as a business grows, and how to move to a system without losing your data.