Asset Retirement Obligation: Initial Measurement vs Accretion Expense
ARO questions usually test two different moments: what happens when the obligation is first recognized and what happens as the discounted liability grows toward settlement.
Initial recognition
When a qualifying legal retirement obligation is incurred and can be reasonably estimated, the liability is measured at present value and a corresponding asset-retirement cost is added to the carrying amount of the related long-lived asset.
Accretion expense
After initial recognition, the liability increases over time as the present-value discount unwinds. That periodic increase is accretion expense.
Asset side
The capitalized asset-retirement cost becomes part of the related asset's depreciable basis and is expensed through depreciation over the asset's useful life.
Exam strategy
Keep the liability and asset sides separate: initial present value creates both; later accretion increases the liability while depreciation reduces the capitalized asset cost.
The takeaway
Initial ARO recognition creates a present-value liability and capitalized asset cost; later accretion grows the liability while depreciation expenses the asset side.
Related Summit resources
FAQ
Is accretion expense the same as depreciation?
No.
Does the initial ARO affect the related asset's carrying amount?
Yes.
Why does the liability grow over time?
Because the present-value discount unwinds as settlement approaches.