The allocation of total inventory costs between ‘cost of sales’ on the income statement, and ‘inventory’ on the balance sheet can vary depending on a company’s choice of inventory valuation method (a.k.a. cost formula or cost flow assumption according to IFRS and US GAAP respectively). In fact, comparing the performance of companies can be quite challenging due to the fact that differences which exist in the allowable inventory valuation methods can lead to significantly different amounts being assigned to inventory and cost of sales.
If the choice of valuation method results in more cost being allocated to cost of sales and less cost being allocated to inventory than would be the case with other methods, then the reported gross profit, net income, and inventory carrying amount in the current year will be lower than if an alternative method had been used.
Inventory Valuation Methods
IFRS and US GAAP allow companies the choice of using either of the following inventory valuation methods: specific identification; first-in, first-out (FIFO); and weighted average cost. US GAAP also allows the use of the last-in, first out (LIFO) method.
Companies must use the same inventory valuation method for all items that have a similar nature and use. A different valuation method is however allowed whenever items have a different nature or use.
When items are sold, the carrying amount of inventory is recognized as an expense according to the cost formula that is used.
Unlike the FIFO, LIFO, and weighted average cost methods, the specific identification method is used for inventory items that are not typically interchangeable and for goods which have been produced and segregated for specific projects. The method is also commonly used for expensive goods that are uniquely identifiable, for example, gemstones.
The method matches the physical flow of the specific items sold as well as those remaining in inventory to their actual costs. The cost of sales and the cost of ending inventory reflect the actual costs that have been incurred to purchase or manufacture the items that are specifically identified as sold and the items that are specifically identified as remaining in inventory.
First-in, First-out (FIFO)
This method assumes that the oldest goods that are purchased or manufactured are sold first while the newest goods purchased or manufactured remain in ending inventory.
The cost of sales reflects the cost of goods in beginning inventory plus the cost of items which are purchased or manufactured the earliest in the accounting period. The value of ending inventory reflects the costs of goods purchased or manufactured more recently.
When prices are rising, the costs assigned to the units in ending inventory are higher than the costs assigned to the units that are sold. Conversely, when prices are declining, the costs assigned to the units in ending inventory are lower than the costs assigned to the units sold.
Weighted Average Cost
This method assigns the average cost of the goods available for sale during the accounting period to the units that are sold as well as to the units that remain in ending inventory.
In an accounting period,
Last-in, First-Out (LIFO)
LIFO assumes that the newest goods purchased or manufactured are sold first and the oldest goods purchased or manufactured, including beginning inventory, remain in ending inventory.
The cost of sales reflects the cost of goods purchased or manufactured more recently, while the value of ending inventory reflects the cost of older goods.
When prices are rising, the costs assigned to the units in ending inventory are lower than the costs assigned to the units sold. Conversely, when prices are falling, the costs assigned to the units in ending inventory are higher than the costs assigned to the units sold.
Under which inventory valuation method are the actual historical costs of specific inventory items matched to their physical flow?
A. FIFO method
B. Specific Identification method
C. LIFO method
The correct answer is B.
The specific identification method matches the actual historical costs of specific inventory items to their physical flow. The FIFO, weighted average cost, and LIFO methods, on the other hand, are based on cost flow assumptions. Under these methods, companies must make assumptions about which goods are sold and which remain in ending inventory.
Which of the following methods would yield higher net income if the prices of production inputs remain constant?
C. None of the above
The correct answer is C.
The main purposes of the inventory valuation methods are to make an assumption about the flow of production cost and to divide that cost between the cost of goods sold and the cost of inventory. If prices of production inputs remain constant, there would be no need to make that assumption, as the cost of inventory at the beginning of the period would be equal to the cost of products produced/purchased during the period. Hence, no matter which inventory valuation method a company follows, the firm would produce the same net income result.
Reading 28 LOS 28b:
Describe different inventory valuation methods (cost formulas)