Differences in Asset Valuation between CAS, U.S. GAAP and IFRS In both China and the United States, asset valuations are based on the historical costs of an asset. Revaluation of assets is not permitted in China and allowed only in the case of business combination under U.S. GAAP. However, IFRS allows revaluation on the basis of either historical cost or fair value for valuing assets, and under the fair value method, revaluation must be conducted regularly according to the changes in market value.
In USA, under GAAP, the companies have their own decision to determine the materiality, which the expenditure can also be capitalized. Since 1993, the tax law changes for commercial buildings with straight-line method in depreciation over 39 years of life.