Accounting rules may require the book value of certain balance sheet items to be tested if there is an indication that economic value is less than book value. In cases where assets are not amortized, this test should be carried out at least annually. If economic value is less than the balance sheet amounts, the assets are written down (impaired). Special valuation rules apply in impairment testing. Pike + Zijlmans has years of experience in impairment testing and can guide clients through the valuation and related audit processes.