You post additional acquisition cost for a fixed asset in the same way as you post the original acquisition cost: from a purchase invoice or from an FA journal.
If depreciation has already been calculated on the fixed asset, place a check mark in the Depr. Acquisition Cost field to have the additional acquisition cost less the salvage value depreciated in proportion to the amount by which the previously acquired fixed asset has already been depreciated.
This feature ensures that the depreciation period is not changed.
The depreciation percentage is calculated as:
P = (total depreciation * 100) / depreciable basis
Depreciation amount = (P/100) * (extra acquisition cost - salvage value)
Remember to place a check mark in the Depr. until FA Posting Date field on the invoice, FA G/L journal or FA journal lines to ensure that the program calculates depreciation from the last FA posting date to the posting date of the additional acquisition cost.