Defining and Assigning Depreciation Areas 
In SAP Business One, you can define the following types of depreciation areas:
Posting to G/L
Additional area
Derived area
For each asset class, you can assign multiple depreciation areas and these depreciation areas will then be taken to all assets in the class. With multiple depreciation areas, you can carry out different depreciation calculations for a single asset.
Defining Depreciation Areas
From the SAP Business One Main Menu, choose .
The Depreciation Areas - Setup window opens.
Enter the code and description, select the type, and specify other parameters.
Choose Add.
Assigning Depreciation Areas to Fixed Assets
From the SAP Business One Main Menu, choose .
The Asset Classes - Setup window opens.
Specify the general information, select the depreciation areas, and specify other required fields.
Choose Add.
From the SAP Business One Main Menu, choose .
The Asset Master Data window opens.
On the Fixed Assets tab, Overview subtab, specify the asset class to which the asset belongs.
Note
You cannot change the asset class of an asset having the status Active.
Once you specify the asset class, the associated depreciation areas are copied to the asset.