We give a method for computing depreciation schedules that reflect the underlying economic value of equipment. In the presence of taxes, these economic depreciation schedules depend on several factors. Including the depreciation schedules imposed by government. If the resulting economic depreciation schedule offers quicker write-offs than the imposed one, the firm could argue that, based on economic rationale, the imposed schedule should be changed to equal the economic schedule. We show the existence of an imposed schedule that equals the resulting economic schedule, and hence is termed “stable”. We also show that stable depreciation schedules are tax neutral (for a range of tax rates) In that the replacement decision is not changed by the tax system.