GAAP to IFRS Inventory Conversion: LIFO vs. FIFO

Introduction

Financial statements are prepared under either Generally Accepted Accounting Principles (GAAP) or International Financial Reporting Standards (IFRS). Converting financial statements from GAAP to IFRS means that items within the income statement and the balance sheet are treated differently, because each framework applies distinct rules and approaches to the same line items. The item examined in this analysis is inventory.

The convergence between GAAP and IFRS is a substantial undertaking that will influence business operations in the future. With respect to inventory, two aspects require consideration. First, IFRS mandates the exclusive use of the First-In, First-Out (FIFO) approach. Second, GAAP allows both the First-In, First-Out (FIFO) and Last-In, First-Out (LIFO) approaches. In contemporary practice, GAAP is a rule-based system whereas IFRS is a principle-based system. The key challenge encompassing convergence is arriving at a universally applicable approach (Robinson et al., 2015).

Inventory Under GAAP: ASC-330

The codification governing the treatment of inventories under GAAP is ASC-330, which provides guiding principles on the accounting and reporting of inventory within financial statements. The measurement of the carrying value of inventory is considered to be the lower of cost or market value. Importantly, the same cost formula does not need to be applied uniformly to all inventories of the same nature and use within an organization.

With respect to accounting methods, ASC-330 permits First-In, First-Out (FIFO), Last-In, First-Out (LIFO), weighted-average cost, and specific identification — all of which are acceptable approaches for determining the cost of inventory. The key aim in choosing a method should be to select the one which, under the circumstances, most clearly reflects income within the accounting period (IAS, 2017).

Inventory Under IFRS: IAS 2

The codification governing the treatment of inventories under IFRS is IAS 2, which provides guiding principles on the accounting and reporting of inventory within financial statements. Under IAS 2, the carrying value of inventory is measured at the lower of cost or net realizable value. In contrast to GAAP, the same cost formula used to determine the cost of inventory must be applied to all inventories of the same nature and use within the organization.

With respect to accounting methods, IAS 2 requires the use of a specific costing method for identifying inventory for financial statement items that are not ordinarily interchangeable, and for goods or services produced and segregated for specific projects. Specifically, IAS 2 permits only the First-In, First-Out (FIFO) or weighted-average cost method. The Last-In, First-Out (LIFO) method is explicitly prohibited under IFRS (IAS, 2017).

Converting Inventory Treatment from GAAP to IFRS

Ending inventory is calculated by adding beginning inventory to new purchases and subtracting the cost of goods sold. Under the LIFO approach, the product most recently received into inventory is the first to be sold. Under the FIFO method, the product first received into inventory is the first to be sold.

Therefore, when converting accounting approaches from GAAP to IFRS, the key practical change is this: under GAAP using LIFO, the inventory sold first is the most recently acquired; under IFRS using FIFO, the inventory sold first is the earliest acquired. This distinction directly affects the cost of goods sold figure and, consequently, gross profit and net income.

Conclusion

IFRS and GAAP inventory treatment differ in a fundamental way. Under GAAP, the FIFO, LIFO, and weighted-average methods are all permissible. Under IFRS, the LIFO method is prohibited. This means that any entity currently using LIFO for inventory valuation must switch to the FIFO approach upon convergence with IFRS.

Under the FIFO approach, the first batch of inventory is sold first. Under the LIFO approach, the last batch of inventory is sold first. One key difference is that the FIFO method produces higher reported returns. Specifically, FIFO increases an entity's gross profit because it matches sales with the lower-cost, earlier-acquired inventory items. This in turn increases both gross profit and net income.

By contrast, the LIFO approach requires an entity to retain older inventory for a longer period, which raises the likelihood of those items becoming spoiled, damaged, or otherwise losing value. Furthermore, LIFO matches sales with the most recently — and typically most expensively — acquired inventory, which reduces gross profit and net income. Understanding these differences is essential for any organization navigating GAAP-to-IFRS convergence and assessing the financial statement impact of the required change in inventory valuation methodology.

References

IAS. (2017). Inventories: Key differences between U.S. GAAP and IFRSs. Retrieved from https://www.iasplus.com/en-us/standards/ifrs-usgaap/inventories

Robinson, T. R., Henry, E., Pirie, W. L., & Broihahn, M. A. (2015). International financial statement analysis. Hoboken: John Wiley & Sons.