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Lease Accounting (FI-LA) 
The purpose of lease accounting is to carry out and display the accounting-relevant aspects of the leasing deal. This covers all the postings needed in asset accounting, the execution of contract-related accrual postings in general ledger accounting, and one-time postings that are made for a lease. Based on the “Lease” contract object, all postings in asset accounting and general ledger accounting are made fully automatically.
Lease accounting is controlled by the Lease Accounting Engine. This is tightly integrated with the CRM system and accounting. In accounting, this includes the Lease Accounting Engine, Accrual Engine, one-time postings, and asset accounting.
The Lease Accounting Engine triggers postings in the Accrual Engine, in asset accounting, and/or directly in the general ledger.
After the contract-related information has been extracted, you can use the SAP Business Warehouse (BW) options.

Lease accounting is supplied with the contract data from the CRM system. This data is automatically processed on the basis of the Customizing settings. Contract data is processed in the following steps:
1.
Classification:
Configurable criteria are used to categorize contracts into various classes
which lead to the same postings in accounting.
2.
Asset
accounting:
In the case of asset-relevant classifications, the relevant postings are
made.
3.
Accrual
Engine:
Depending on the classification, configurable accruals are created and
posted.
4.
One-time
postings:
Depending on the classification, one-time general ledger postings are
made.
This process is always the same for both new and changed leases and is to be configured with different settings depending on the classification and the process.
Customizing is used to set all postings in the Lease Accounting Engine. There is no mandatory posting concept.