Maintaining Accurate Stores Records for Inventory Management

A factory floor supervisor picks up ten litres of a chemical for a production run, and no one writes it down. A week later, the accounts show enough stock for the month, but the shelf is nearly empty. This gap between what the books say and what is actually in the store is exactly what stores records are designed to prevent. In a cost accounting system, two documents do most of this work: the bin card and the stores ledger. Together with the paperwork that feeds them, they turn the physical movement of materials into a system you can actually control.

Why stores records matter in inventory control 🔗

Materials move constantly once a business starts operating: raw material comes in from suppliers, gets issued to production, sometimes gets returned or transferred between departments. Without a documented trail, no one can say with confidence how much stock exists, what it is worth, or whether pilferage and wastage are happening. Stores records exist to close that gap. They give the storekeeper a quantity check at the point of storage and give the costing department a value check for pricing, budgeting, and financial reporting. Together, they support the four practical goals of good material control: avoiding stockouts, avoiding overstocking, catching discrepancies early, and pricing materials issued to production accurately.

Bin cards: the storekeeper’s quantity record 🔗

A bin card is a quantitative record attached to the bin, rack, or shelf where a specific material is stored. It is maintained by the storekeeper, not by the accounts team, and it stays physically in the store rather than in an office file. Every time material is received, issued, or returned, an entry goes on the card, so the running balance is visible at a glance without needing to count the physical stock.

What a bin card typically records 🔗

A standard bin card carries the material’s code and description, the date of each transaction, quantities received and issued, the running balance, and often the minimum, maximum, and reorder levels for that item. Because it is updated by the person handling the material, entries are usually made as the transaction happens, which is why bin cards are sometimes described as the storekeeper’s day-to-day working document rather than a formal accounting record. The Institute of Chartered Accountants of India’s study material on material costing lists bin cards, or stock control cards, as one of the essential documents that make a perpetual inventory system work in practice.

Stores ledger: the costing department’s value record 🔗

The stores ledger does everything a bin card does, and then adds the piece a storekeeper usually cannot supply on their own: the money value of the stock. It is maintained by the cost accounting department, typically by a costing clerk, and shows quantity, rate, and value for every receipt, issue, and balance. Where a bin card might simply say “50 units issued,” the stores ledger will show the rate applied and the resulting value, which then feeds directly into product costing and the valuation of closing stock.

Entries in the stores ledger are usually posted after the transaction has already taken place, based on supporting documents such as the goods received note, the materials requisition slip, and any material return note, rather than being written at the moment of physical movement. This is one of the clearest differences between the two records, and it also explains why the two are meant to be reconciled with each other rather than used interchangeably.

The documents that feed these records 🔗

Neither the bin card nor the stores ledger is filled in arbitrarily. Both rely on a small set of standard forms that create an audit trail from the moment material enters the business to the moment it leaves the store for production.

Goods received note 🔗

When a supplier’s consignment arrives, the stores or receiving department checks it against the purchase order and prepares a goods received note (GRN). It confirms the quantity and condition of what has actually arrived, and copies are typically routed to the purchase department, the stores or indenting department, and the accounts or costing section. ICAI’s material costing chapter notes that a goods received note is generally prepared in multiple copies so that every department with a stake in the purchase has its own record, and any material found short or damaged is reported separately rather than simply accepted. The GRN is the source document for the “receipt” entries in both the bin card and the stores ledger.

Materials requisition slip 🔗

On the issue side, production or another user department cannot simply walk into the store and take material. It must raise a materials requisition slip, sometimes called a materials requisition note, which acts as a voucher authorising the storekeeper to release the specified quantity. ICAI’s guidance describes it as a voucher of authority used to obtain materials from stores, usually raised by the department that needs them and shared with both the store and the costing section. This single slip triggers two things at once: the storekeeper reduces the balance on the bin card, and the costing clerk records the issue, valued at the appropriate rate, in the stores ledger. Without it, there would be no way to trace which department consumed which material, which matters both for cost allocation and for internal control. Accounting practitioners note that these requisition forms also give auditors a way to check whether material was properly approved before it left the store, which is exactly the kind of control gap that stores records are meant to close.

Stock verification: keeping the records honest 🔗

Even a well-maintained bin card and stores ledger are only useful if they match what is physically on the shelf. That is where stock verification comes in, and businesses generally use one of two approaches, often together.

Periodic stock verification 🔗

In periodic verification, the entire stock is physically counted at a fixed interval, commonly once a year, and the counted quantities are compared against the bin card and stores ledger balances. This method gives a thorough, one-time check across every item, but it usually means pausing normal store operations while the count is underway, and any discrepancy discovered only comes to light at that single point in time rather than as soon as it occurs.

Continuous stock verification 🔗

Continuous or perpetual stock verification spreads the counting across the year instead of concentrating it in one exercise. A portion of the stock is checked on a rotating basis, so operations do not need to stop, and errors are caught closer to when they happen rather than months later. ICAI’s material costing material points out that the success of a perpetual inventory approach depends on continuously reconciling the stores ledger and bin card balances against actual physical counts, rather than treating either record as correct by default. Accounting practitioners similarly note that under a perpetual system, discrepancies stand out quickly because records are updated continuously, which makes it easier to trace a mismatch back to its cause, whether that is a clerical error, damage, or theft. When the physical count does not match the books, the difference is usually adjusted in the stores ledger, and if it is unusually large or repeats for the same item, it is a signal to review handling and documentation procedures rather than simply correct the number and move on.

Why this discipline pays off 🔗

None of this record-keeping is bureaucracy for its own sake. Accurate bin cards and stores ledgers let a business reorder before it runs out of a critical material, avoid tying up working capital in excess stock, price its output correctly using a consistent method such as FIFO or weighted average, and produce financial statements that reflect real inventory value rather than an estimate. Every discrepancy caught during stock verification is essentially a small leak in the system, whether it is a supplier shorting a delivery, a requisition that was never properly authorised, or ordinary wastage, and catching it early is far cheaper than discovering it during an annual audit. A stores ledger that has been reconciled with actual stock, described by cost accounting writers as a record that gives a comprehensive, ongoing view of inventory for financial and accounting purposes, is what allows a costing department to trust its own numbers when it prices a product or reports on profitability.

What do you think? If a small business had to choose between maintaining a detailed bin card at every storage point or investing in a proper stores ledger system, which would you prioritise first, and why? And between periodic and continuous stock verification, which approach do you think suits a growing manufacturing unit better as its product range expands?

References

1. https://resource.cdn.icai.org/93305bos-aps5870-ch2.pdf
2. https://live.icai.org/bos/vcc-3rd-batch/pdf/Chapter_2_Material_Costing.pdf
3. https://www.accountingtools.com/articles/material-requisition-form
4. https://www.accountingtools.com/articles/what-is-the-difference-between-the-periodic-and-perpetual-in.html
5. https://www.wallstreetmojo.com/stores-ledger/