“Useful life” refers to the length of time organizations can profitably use an asset before replacing it. The key word here is “profitably,” as the term does not refer to an asset's entire expected life span.
Most machines can (and do) last beyond their useful life. But even when they’re functional, old assets can cost more in maintenance expenses than new equipment due to increasingly frequent repairs.
For maintenance professionals managing industrial facilities, understanding useful life is critical for making repair-or-replace decisions, improving maintenance budgets, and calculating asset depreciation.
Here, you'll learn how to determine useful life for your assets, what factors influence equipment longevity, and how smart maintenance extends profitable service periods.
Key takeaways
- Useful life is an estimate of an asset's profitable service duration, not its total operational lifespan.
- You can determine an asset's useful life by consulting IRS guidelines, manufacturer specifications, and your own historical asset data.
- Extending an asset's useful life through proactive maintenance directly improves its ROI and lowers its total cost of ownership.
- Useful life is a key variable in calculating annual depreciation, which impacts your budget planning and tax obligations.
What is useful life?
Fixed assets (equipment, machinery, and building components) depreciate over time. Useful life helps you squeeze every profitable year out of your equipment. Companies rely on this time-based metric to determine the tipping point at which investment in repairing the equipment becomes more expensive than replacing it.
The question for management and maintenance teams comes down to deciding whether to conduct repairs on aging assets or run them to failure. Replacing an asset that's nearing the end of its life is often more cost-effective than repairing it.
But maintenance professionals aren't the only ones concerned with this metric. Organizations also use it to calculate depreciation for tax purposes and financial planning, according to the Internal Revenue Service's Topic No. 704.
How to determine the useful life of an asset
Even for the same types of asset, cost-effective holding periods vary from one organization to the next. Many factors (equipment age, working environment, maintenance policies, and asset usage) impact whether you should replace an asset or keep running it.
This makes it difficult to calculate the absolute value of an asset's useful life. But companies can use several methods to estimate the time frame.
Consult the Internal Revenue Service
This is the simplest way to determine the useful life of an asset. The agency's Publication 946 lists the estimated useful life for various assets depending on industry and application. These estimates serve as a baseline to determine the metric for similar business assets.
Check manufacturer specifications
Manufacturers also provide data to help determine useful life. This information is often more precise than IRS estimates. They may list an asset's life in terms of the number of cycles or operating hours. Both figures guide organizations toward making accurate calculations based on usage.
Research past history
Organizations also rely on data from similar assets to determine a new asset’s useful life. Some assets last longer than manufacturer specifications when organizations deploy them for specific uses. This helps organizations extend the value of similar assets.
Make annual adjustments
Of course, over time, assets wear out. But a well-planned maintenance strategy can extend the investment's useful life. Also factor in major asset failures when estimating the figure.
As your business scales or changes operations, some assets may require upgrades or become obsolete.
Example of asset useful life
Say a maintenance manager at a manufacturing facility purchases a new forklift. The industry useful life standard for forklifts is 10,000 hours.
While the forklift could remain operable for more than a decade, maintenance costs will eventually exceed replacement costs. Many factors will impact its useful life, including monthly operating hours and maintenance frequency.
How useful life affects depreciation
An asset's useful life directly determines its depreciation. You can calculate asset depreciation by dividing the costs of an asset by its estimated useful life.
Here's an example: A $38,000 asset with a useful life of 10 years depreciates at a rate of $3,800 per year. (That is, $38,000 ÷ 10 years = $3,800/year.)
However, if the same asset has a useful life of 15 years, its depreciation will be $2,533 per year. (That is, $38,000 ÷ 15 years.)
When an asset has a lower depreciation value with a longer useful life, the company takes deductions for a longer period and saves more in the long run.
Factors that impact useful life
The useful life of an asset is not a fixed number. Several operational factors can either extend or shorten the amount of time an asset stays profitable for your organization.
Understanding these variables helps your team make more accurate forecasts and get more life out of your equipment.
Here are a few to consider:
- Usage intensity: Equipment that runs 24/7 under heavy loads will have a shorter useful life than an identical asset that operates during a single shift with lighter loads. Tracking operating hours is essential to estimate this accurately.
- Operating environment: The conditions an asset operates under play a significant role. Extreme temperatures, humidity, dust, and corrosive chemicals accelerate wear and tear.
- Maintenance quality: A proactive maintenance strategy, including regular preventive maintenance and inspections, is the most effective way to extend useful life. Conversely, a reactive, run-to-failure approach shortens it.
- Operator skill: Well-trained operators who follow standard operating procedures cause less unnecessary wear on equipment. Proper startup, shutdown, and operational practices significantly prolong an asset's productive lifespan.
Extending asset useful life through maintenance
While you can’t stop an asset from aging, you can control the rate of its decline. As we mentioned above, a proactive, structured maintenance program is your best tool for extending an asset's useful life and getting better ROI.
Preventive maintenance is the foundation of this strategy. By performing routine inspections, lubrication, cleaning, and parts replacements on a set schedule, you address minor issues before they become major failures. This consistent care reduces wear and tear.
Good record-keeping makes this process easier. Using a computerized maintenance management system (CMMS) to log all work orders, parts you use, and labor hours gives your team a detailed history for each asset.
This data helps you identify recurring problems, refine your maintenance schedules, and make more accurate predictions about an asset's remaining useful life.
The final word on maximizing asset useful life
By managing the factors that influence equipment longevity, your team can proactively improve profitability.
Modern maintenance teams need tools that turn asset data into actionable information. Using a CMMS like MaintainX gives your team the power to track asset history, schedule preventive maintenance, and make maintenance decisions that extend useful life across all your facilities.
To see how MaintainX can improve your asset management strategy, sign up for free.
Useful Life FAQs
Preventive maintenance can extend an asset's useful life by reducing wear and tear, preventing catastrophic failures, and keeping equipment operating at peak efficiency. Regular inspections and servicing allow your team to catch and correct minor issues before they shorten the asset's profitable lifespan. A consistent PM program also gives your team valuable data to refine useful life estimates over time.
Replace equipment when an asset reaches the end of its useful life. This is the point where the cumulative cost of repairs, parts, and associated downtime begins to exceed the cost of purchasing a new, more reliable asset. Tracking maintenance costs with a CMMS can help you identify this crossover point and give you the data to justify the capital expenditure for a replacement.
Useful life is the period an asset operates profitably, ending when repair costs exceed replacement costs. Total equipment lifespan is how long an asset functions physically, regardless of its economic viability. Assets often run past their useful life at much higher operating costs.
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