What it means
Most businesses cannot tell one unit of inventory from another. A wholesaler with 40,000 identical tins of paint has no sensible way of knowing which particular tin left the warehouse, so accounting rules let it assume an order of costs instead.
Specific identification is the opposite situation: each item is unique, individually costed and individually tracked from purchase to sale. Because the method uses real costs rather than assumed ones, it produces the most faithful picture of gross profit on each sale.
A dealer who paid $54,000 for a particular car and sells it for $71,000 has genuinely made $17,000 on that transaction, and the accounts say so. That precision is exactly why auditors and tax authorities like it for high value goods.
The practical constraint is administration. Every item needs a unique reference, a recorded cost and a record of where it sits, which is realistic for 300 vehicles and unrealistic for 300,000 fasteners.
Modern stock systems with serial number or batch tracking have widened the range of businesses that can apply it, but the cost of the record keeping still has to be worth the accuracy gained. There is a second nuance that matters to finance teams: the method gives management a degree of choice over reported profit.
If three similar units are in stock at different costs and any of them would satisfy the customer, the seller can influence this period's gross margin by choosing which one to ship. Accounting standards allow the method, but they also expect it to be applied consistently rather than used to smooth or inflate results.
Under both international standards and generally accepted practice, specific identification is required, not merely permitted, for inventory items that are not ordinarily interchangeable, and for goods produced and segregated for particular projects. For everything else, businesses fall back on first in first out or weighted average cost.
Knowing which category your stock falls into is usually the first question an auditor asks.
In practice
Real-world examples.
Example
A used car dealership records the purchase price, transport cost and reconditioning spend against each vehicle identification number. When a saloon that cost $16,400 all in sells for $21,900, the system charges exactly $16,400 to cost of sales and reports $5,500 of gross profit on that car.
Example
A jeweller holds 120 certificated diamonds, each with its own laboratory reference and purchase invoice. Selling a stone bought for $9,800 at $17,500 produces a recorded margin of $7,700, and the remaining 119 stones stay on the balance sheet at their individual costs.
Example
A residential developer treats each plot on a 24 house site as a separate inventory item, allocating land, groundworks and construction costs plot by plot. When plot 11 completes at $480,000 against accumulated costs of $362,000, the profit of $118,000 is recognised on that plot alone rather than spread across the site.
Formula
Calculation
Cost of goods sold = the actual recorded cost of the specific units sold
Ending inventory = the actual recorded cost of the specific units still held
A gallery buys three paintings during the year: one for $12,000, one for $18,000 and one for $27,000, so total purchases are $57,000. It sells the middle painting for $30,000 and still holds the other two at the year end.
Under specific identification, cost of goods sold is the actual cost of the item sold, $18,000, so gross profit is $30,000 - $18,000 = $12,000. Ending inventory is $12,000 + $27,000 = $39,000.
For comparison, weighted average cost would treat every painting as costing $57,000 / 3 = $19,000. Cost of goods sold would be $19,000, gross profit would be $30,000 - $19,000 = $11,000, and ending inventory would be $57,000 - $19,000 = $38,000. The $1,000 difference in reported profit comes entirely from the choice of method, not from anything that happened in the business.Case study
Seen in the real world.
The following is an illustrative and entirely fictional example. Halverton Classic Motors, an invented dealer in restored vehicles, held three cars at the start of the quarter: one recorded at $30,000, one at $36,000 and one at $54,000, giving total inventory of $120,000. A collector bought the most expensive car for $71,000.
Using specific identification, the fictional dealer charged $54,000 to cost of sales and reported gross profit of $71,000 - $54,000 = $17,000, leaving inventory of $30,000 + $36,000 = $66,000. Its bookkeeper had previously suggested weighted average cost, which would have valued every car at $120,000 / 3 = $40,000, produced reported profit of $71,000 - $40,000 = $31,000 and left inventory at $80,000.
The $14,000 gap mattered in two directions. Reporting the higher figure would have flattered the quarter and, at a 25% tax rate, brought forward $3,500 of tax on profit the business had not really made on that car. It would also have overstated the remaining stock by $14,000, which the fictional dealer's bank would have discovered the moment the two cheaper cars sold at their true margins.
Watch out
Common mistakes.
- Assuming any business can choose specific identification, when standards require it only where items are genuinely not interchangeable and effectively rule it out for mass produced stock.
- Recording only the invoice price and forgetting the freight, duty, reconditioning and direct handling costs that belong in the cost of each item.
- Selecting which unit to ship in order to hit a margin target, which turns a legitimate method into earnings management and will be challenged on review.
Questions
People also ask.
Does specific identification give a higher profit than first in first out?
Not systematically, because it reports the real cost of the item sold, so it can be higher or lower than any assumed cost flow depending on which unit went out of the door.
Is the method allowed for tax purposes?
In most jurisdictions yes, and for unique high value goods it is usually the expected treatment, though local rules on consistency and record keeping still apply.
What happens if an item is damaged or becomes unsellable?
Its individual carrying cost is written down to net realisable value, and because each item is costed separately the write down hits only that unit rather than a pooled average.
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