An asset can outlast its usefulness to the entity holding it, and the shorter period is the one that governs. Three limits compete, and whichever arrives first ends the life.
Physical limits include wear and deterioration. Economic limits can arise from inadequate capacity, replacement by better technology, or loss of the process the asset serves. Legal limits include lease terms, licence periods, and regulatory permissions.
A server bought for a growing company can remain physically operable after its capacity or technology no longer meets the entity's needs. Using the possible hardware life would then report a service pattern the business will not experience.
A useful life is selected by a person and supported by evidence, and it moves reported income in every year the asset is held. When a reviewer asks what supports six years, the answer has to be more than that six was used last time.
Preserve the evidence behind the endpoint
Build a dated support file for physical condition, expected activity, capacity, maintenance, technology, replacement policy, contract terms, and legal limits. State which factor ends service first. A tax recovery period or a vendor's maximum specification does not automatically become book useful life.
ASC 360-10-35-4 connects allocation with expected useful economic life. Paragraph 35-9 limits reliance on tax recovery periods for book depreciation.
Use the method and component example to hold life constant across methods. Then use shared-input practice to test physical, economic, and legal service limits separately.
Put the concept to work
Understand this concept
- Distinguish the physical, economic, and legal limits that can end an asset's service to an entity, and explain why the shortest of them governs.
Analyze this concept
- Judge whether the evidence offered supports a selected useful life, and predict what a longer or shorter life does to reported income, carrying amount, and asset turnover across the years affected.
Learning resources
Choose a lesson, try an application, or inspect the sources behind this concept.
Build on these ideas
- Accounting estimate — Understand
To analyze this concept: Required. A useful life is an estimate and carries an estimate's obligations.
- Depreciation — Understand
To understand this concept: Required. A life is the period cost is allocated over.
- Useful life — Understand
To analyze this concept: Required. Judging a life requires knowing what limits it.
Lessons
Worked examples and cases
Practice
Common mistaken ideas
Sources
Standard references
Broader topics
Related concepts
Use this idea next
- Activity-method depreciation — Understand
Required level here: understand. Required. Every pattern allocates across a selected life.
- Declining-balance depreciation — Understand
Required level here: understand. Required. Every pattern allocates across a selected life.
- Finite-lived intangible asset — Understand
Required level here: understand. Required. A finite life is what the classification turns on.
Show 5 more next steps
- Indefinite-lived intangible asset — Understand
Required level here: understand. Required. An indefinite life is what the classification turns on.
- Land improvement — Understand
Required level here: understand. Required. A limited life is what forces the separation.
- Straight-line depreciation — Understand
Required level here: understand. Required. Every pattern allocates across a selected life.
- Sum-of-the-years'-digits depreciation — Understand
Required level here: understand. Required. Every pattern allocates across a selected life.
- Useful life — Analyze
Required level here: understand. Required. Judging a life requires knowing what limits it.