Are you aware of what types of assets can and cannot be depreciated? There are some the must be depreciated and here are just a few. If the asset is being held so that it creates income or if you use the asset as a type of trade, these are just two reasons. If there is a time limit on the asset as for its usefulness or usability and this time frame must be over one year, and this time frame must be able to be estimated or calculated with some accuracy.
If this asset can break down, or be worn out, replaced because it is outdated or it just obviously over time loses value. There are also those items that must be appreciated like buildings, machines, cars and computers as well as any improvements done on things of major importance, but this does not include just regular repairs.
Those things that cannot be depreciated and the most typical one is land as it can never be destroyed. It never loses value so if you build on your land, to claim depreciation, you subtract the land cost from the cost of what you built. If you have something that you rent our or lease, this too cannot be depreciated.