Is the depreciation provide on company policy base or government decision?

Normally, the first one is "Accounting Depreciation" and the second one is "Tax Depreciation".
Accounting depreciation is used to prepare financial statements.
As Government had defined its own rules that may differ from company policy.
Then accounting depreciation is excluded to incorporate tax depreciation.
This is done to file tax returns.

In certain countries; the regulatory authority also instruct companies the separate RATE of depreciation.

 

But generally companies follow IFRS or GAAP accounting method.

Some countries regulate through Company Law and also through Incometax Act. But regulation through Incometax Act need not affect Accounts books.Same time , Corporate entities may be regulated and non corporate like Partnership may not be regulated 

So, generally and basically, Accounting Standard . 

Depreciation is based on company policy which in turn is based on pattern in which you consume economic benefit from the asset.Based on the pattern of consumption of economic benefit you use straight line or reducing balance method.There are other ways as well.However, from a tax man point of view depreciation is based on rates set by the relevant revenue body.

Depreciation provide on company policy

Depreciation must be calculated as per company policy while tax deprecation should be calculated as per tax law, it will result in deferred taxation. IAS does not provide us tax rates and tax rates should be based on physical wear and tear and other factors

Depreciation for financial reporting purpose is based on company policy, which is disclosed in Financial statements. Depreciation calculated for tax purpose is based on goverment regulation and guidance. Have a nice day :)

depreciation charg to company is according to ias ifrs