US GAAP
IFRS
Impact
Inventory Valuation
Permits LIFO, FIFO, weighted average cost, or specific identification. Inventory carried at lower of cost or market. Permits FIFO or weighted average cost; LIFO not permitted. Inventory carried at lower of cost or net realizable value. Companies that use LIFO must revalue inventory, which could result in major tax liabilities due to the IRS’s LIFO conformity rule.