Change in depreciation method

The depreciation method reflects the pattern in which the entity expects to consume an asset’s future economic benefits. When that pattern changes, the method is revised as a change in accounting estimate. Apply the new method prospectively; do not restate prior periods merely because the estimate has changed. Calculate future charges using the carrying amount at the date of change, the revised remaining useful life, and any residual value. A correction of a prior-period error is a different matter and may require retrospective treatment under the applicable rules.