cumulated depreciation

On January 1, 2005, JME Corporation changed from the straight line method to an accelerated method of depreciation. Under the accelerated method, the accumulated depreciation through December 31, 2004, was $600,000 higher than if the straight line method had been used. JME’s income tax rate is 40 percent. What is the cumulative effect of this change in accounting principle? A) $240,000. B) $360,000. C) $600,000. D) $0. Your answer: A was incorrect. The correct answer was B) $360,000. 600,000 × (1 – 0.4) = 360,000 ************ wat is the reasoning behind calculating the after tax effect of the depreciation?

Because NI would decrease by this much. You got $600k additional depreciation. For example, assume your sales were $10,000,000, CGS $6,000,000, and old depreciation expense of $400,000, then old NI (before taxes) = $10,000,000 - $6,000,000 - $400,000 = $3,600,000. Tax = $3,600,000 * 0.40 = $1,440,000, and NI = $2,160,000. Now that you have an additional $600,000 od depreciation, you just need to subtract $600,000 (1-0.40) = $360,000 from NI, to get a new NI = $1,800,000. Do it again (to check your numbers) using the correct depreciation of $1,000,000 ($600k + $400k). Dreary