These two get confused because they look almost the same and record the same goods. The difference is where each one is kept, who writes on it, and whether it shows money.
The short version
A bin card stays with the goods. It hangs on the shelf or sits in the bin, and records quantities only: what came in, what went out, what's left. The storekeeper fills it in at the moment goods move.
A stock card, also called a stores ledger card, is kept in the office or with the accounts. It records the same movements, with the cost and value as well. Whoever keeps the books fills it in from the paperwork.
| Bin card | Stock card | |
|---|---|---|
| Kept | With the goods, in the store | In the office or with the accounts |
| Written by | Storekeeper | Bookkeeper or owner |
| Shows | Quantities only | Quantities, unit cost and value |
| Updated | At the moment goods move | From receipts and issue notes |
| Purpose | Know what is physically there | Know what the stock is worth |
Because they're kept by different people from different sources, each checks the other. If the bin card says 40 and the stock card says 46, something was issued without paperwork, or the paperwork wasn't posted.
A bin card, filled in
The figures are examples.
Item: Vegetable oil, 5 litre keg. Location: Store room, rack 2. Unit: keg. Minimum level: 10.
| Date | Reference | Received | Issued | Balance | Sign |
|---|---|---|---|---|---|
| 1 Oct | Balance brought forward | 18 | KA | ||
| 3 Oct | To shop shelf | 6 | 12 | KA | |
| 6 Oct | To shop shelf | 4 | 8 | KA | |
| 7 Oct | GRN 0031, Sunrise Distributors | 24 | 32 | KA | |
| 10 Oct | To shop shelf | 6 | 26 | KA |
On 6 October the balance dropped to 8, below the minimum of 10. That's the signal to reorder, and the delivery came the next day.
Notice there is no money anywhere on the card. A storekeeper doesn't need to know what the oil cost in order to count kegs.
A stock card for the same item
| Date | Reference | In | Out | Balance | Unit cost | Value |
|---|---|---|---|---|---|---|
| 1 Oct | Balance brought forward | 18 | 11,500 | 207,000 | ||
| 3 Oct | Issued to shop | 6 | 12 | 11,500 | 138,000 | |
| 6 Oct | Issued to shop | 4 | 8 | 11,500 | 92,000 | |
| 7 Oct | GRN 0031 | 24 | 32 | 12,000 | 380,000 | |
| 10 Oct | Issued to shop | 6 | 26 | 11,500 | 311,000 |
The new delivery cost more: ₦12,000 a keg against ₦11,500 for the old stock. So after 7 October the store holds 8 kegs at the old cost (₦92,000) and 24 at the new (₦288,000), which is ₦380,000 in all.
On 10 October, six kegs go out. Under first in, first out, they come from the old stock, so they are priced at ₦11,500: ₦69,000 in total. That leaves ₦311,000.
Price that same issue at the new cost by mistake and you'd show ₦308,000, a ₦3,000 error from a single line. This is why a stock card needs one costing method, used every time. The method here is explained in first in, first out: how FIFO works in a provision store.
Which one do you need?
A small shop where everything is on the shelves. You don't need both. One page per item with a running balance does the work of the two together. That's the stock record book, and it's where most shops should start.
A shop with a separate store room. Put a bin card on each rack in the store room. Goods leave the store only when someone writes the line. Keep your stock record book for the shop as a whole. Now the store room and the shop floor can each be counted and checked.
A wholesaler or distributor with a warehouse. Use both in full. A storekeeper who keeps the bin cards and a different person who keeps the stock cards is a basic control, because no single person can make goods vanish from both records.
A pharmacy. Bin cards are common here, often with batch number and expiry date added as extra columns, since two packs of the same medicine can expire a year apart. See how to do stock-taking in a pharmacy.
Rules that keep the cards honest
- Write the line when the goods move, not at the end of the day.
- Every receipt quotes a goods received note number. Every issue quotes who took it and where it went.
- Use pen. Correct mistakes with a single line and initials.
- Count the bin against its card regularly, and write the count on the card.
- Don't let the person who orders goods be the only one who records their arrival.
A card that's a week behind is worse than no card, because people trust it.