Is depreciation an accounting policy or accounting estimate?

Dear Sir

Kindly,note that deprecication is a method of destribute the cost of tangable assets during usefullife,there are many acceptable methods of depreciation for example Straight line method or sum of digit years , Depreciation is an estimate,becuase there is many methods to use in order to calculate yearly amount of depreciation expense , on other hand,Policy is a managment Decision to use a suitable estimattion or decision of Selection the best estimation method in order to show it's financail statements   

Technically, depriciation is an accounting estimates. But it is also correct to say that depriciation is a matter of accounting policy because it is a must to depriciate our long-term assets to reflect proper distribution of expenses.

Depreciation is  Accounting Estimates.

change in depreciation method is not a change in accounting policy rather it is a change in accounting estimate. Change in accounting policy only occurs if rules of either recognition, measurement or presentation of line item are changed. Change in depreciation method changes neither of these. Therefore, it is a change in accounting estimate.

Estimate

estimate not policy

Depreciation is an accounting policies and accounted by estimates method 

Depreciation is an accounting estimate to determine the exact value of the Assets. 

Depreciation is an account policy i.e. we have two types of accounting policy1) Cost base2) fair valuue

when we follow Cost base then we calcuate deprecation as per matching and accrual concept. And the way depreciation is carried out i.e. Striaight line, Double Straight Line, Reducing balance method and some of digit method is accounting estimte.

If estimte is changed in this instance e.g. from straight line deprection to reducing balance method then the affect is prospective but if the Accounting Policy is changed to Fair value method from cost base then the change will be retrospective and have to adjust the prior figure as well