what is the modified accelerated cost recovery system macrs 
the modified accelerated cost recovery system macrs is a depreciation system used for tax purposes in the u s macrs depreciation allows the capitalized cost of an asset to be recovered over a specified period via annual deductions the macrs system puts fixed assets into classes that have set depreciation periods understanding the modified accelerated cost recovery system macrs as defined by the internal revenue service irs depreciation is an income tax deduction that allows a business to recover the cost basis of certain property deprecation is an annual allowance for the wear and tear deterioration or obsolescence of property most tangible assets are depreciable likewise certain intangible assets such as patents and copyrights are depreciable 1the modified accelerated cost recovery system macrs is the proper depreciation method for most assets macrs allows for greater accelerated depreciation over longer time periods this is beneficial since faster acceleration allows individuals and businesses to deduct greater amounts during the first few years of an asset s life and relatively less later 2for property placed into service after 1986 the irs requires businesses to use macrs for depreciation 3depreciation using macrs can be applied to assets such as computer equipment office furniture automobiles fences farm buildings racehorses and so on 4now there are things for which macrs cannot be used for notably intangible property films video tapes and recordings other property excluded from macrs include certain corporate or partnership property acquired in nontaxable transfers 5types of macrsthere are two key macrs depreciation systems the first is the general depreciation system gds while the second is the alternative depreciation system ads these two systems have different recovery periods and depreciation methods for the most part gds is used although in special cases ads can be used 6the general depreciation system uses the declining balance method which allows for a larger depreciation expense to be recorded in the early years and smaller amounts in the later years the alternative depreciation system allows depreciation to be taken over a longer period of time 7the gds is best used for assets that depreciate quickly such as computers and other technology meanwhile the ads must be used in certain instances such as property used in a farming business property that is exempt from taxation or any property used outside the u s ads must also be used for any listed property used 50 or less in a business during the tax year 8now businesses can elect to use ads instead of gds the election must cover all property in the same property class and once made that election can never be changed 6property classificationsthe irs publishes the useful lives of various classes of assets this information is used to compute the depreciation for a given type of qualified asset a few examples of some assets and their useful lives in years as published by the irs include 9the irs s publication 946 how to depreciate property has a full breakdown of asset classes and their useful lives since the tax rules for macrs are complex the 100 plus pages of the irs publication 946 provide complete guidance on depreciating assets with macrs the nine asset classes presented above are for gds there are more asset classes for ads and the recovery life is longer for example the useful life of residential rental property under ads is 30 years and for commercial property it is 40 years 7based on the information provided in the table a business can determine its tax depreciation for assets the basis for depreciation of macrs property is the property s cost basis multiplied by the percentage of business investment use the amount derived is recognized in the company s income tax return and used to determine taxable income by factoring in any tax credits and deductions that can be claimed on the property 10note that the derived tax depreciation is not recorded in the financial statements as these statements calculate depreciation using the straight line depreciation method or some other form of accelerated cost depreciation method macrs is used for tax purposes and not for financial statements as it s not approved by u s generally accepted accounting principles gaap for example a company may use macrs for tax depreciation and straight line depreciation for creating financial statements 