Use
Asset Accounting uses the same company codes as the General Ledger. However, you must further define these company codes with the specifications needed for Asset Accounting. You have to define these company codes in FI-AA Customizing before they can be used in Asset Accounting (Customizing: Organizational Structures).

FI-AA Company Code Definition
Features
The most important control feature in the Asset Accounting company code is the chart of depreciation (see
Chart of Depreciation). It contains the parameters (such as, the depreciation keys) that are used for calculating asset values in a given country. Each asset company code refers to exactly one chart of depreciation (FI-AA Customizing: Organizational Structures).In addition, you make the following specifications in FI-AA Customizing at the company code level:
Assignment of Assets to Company Code
You must always enter a company code when you create an asset. This ensures that each asset is always uniquely assigned to a company code.
Status
The status of a company code in Asset Accounting can be defined as follows (FI-AA Customizing: Preparations for Production Startup):
Reports
You can create asset reports per company code. For reports for a group concern, it is also possible to run reports on some or all company codes
Legacy Data Transfer
There is a special Customizing transaction for legacy data transfer. You use it to specify the transfer date per company code, and to specify different parameters per depreciation area (see
Legacy Data Transfer).