The client depends on his accountant to provide a journal entry for the annual depreciation expense They have adopted a policy of treating book depreciation equal to tax depreciation . Depreciation expense for the year will include a Depreciation on assets placed in service prior to 2015 is $86 769 Maximize Sec 179 expense on assets placed in service in 2015 Take Sec . 163 ( K ) - 509 6 Bonus - on new equipment if applicable