ASSET PROCESS ยท ALLOCATE
How does SAP calculate and post depreciation?
Depreciation spreads depreciable value across useful life according to accounting, tax, and management valuation rules.
How SAP controls it
Depreciation keys, useful life, methods, period control, depreciation areas, ledgers, and posting runs determine amounts.
The productive machine begins straight-line book depreciation from its capitalization date.
PRACTICAL DECISION
Explain the planned amount before posting it
Depreciation is a period calculation based on the asset value, depreciation key, useful life, start date, and the rules of each depreciation area. Different accounting views may legitimately produce different amounts.
FOLLOW THE EVIDENCE
How to work through this capability
Check the depreciable value
Review acquisition and subsequent-value postings, residual value, and any partial retirement. A wrong cost basis cannot be corrected by simply changing the monthly rate.
Check the period rule
Confirm the asset value date, capitalization date, useful life, and period-control method. An apparently missing first month may come from the start rule rather than a failed run.
Reconcile the run
Compare planned depreciation with the posted run, investigate errors or skipped assets, then tie asset balances and depreciation expense to the ledger for the reporting period.
CHECK THE RESULT
What evidence should agree?
Keep the asset master history, value transactions, planned values by depreciation area, run log, posting document, and ledger reconciliation together. When an amount changes, identify which input changed and whether prior periods need an approved correction.
Do not edit useful life solely to force an expected monthly number. Establish the policy decision, correct the owning asset data, and rerun the calculation with an auditable explanation.