What is the Units of Production Method?

The Units of Production Method is a depreciation approach that allocates the cost of an asset based on its output or usage rather than the passage of time. This method is particularly suitable for assets whose productivity varies over time and for which the wear and tear is directly related to the volume of production or usage. By linking depreciation to the actual level of activity, the Units of Production Method aims to provide a more accurate reflection of an asset's decreasing value as it contributes to the production process.

Key Aspects of Units of Production Method

1. Variable or Activity-Based Depreciation: The Units of Production Method falls under the category of variable or activity-based depreciation methods. Unlike fixed methods that allocate depreciation evenly over time, this approach varies the depreciation expense based on the level of activity or productivity of the asset.
2. Formula: The formula for calculating depreciation using the Units of Production Method is: Depreciation Expense = ( (Cost − Accumulated Depreciation) / Total Estimated Units) × Units Produced or Used in the Period. This formula considers the proportion of the asset's total capacity utilized during a specific period.
3. Actual Usage or Output Consideration: Unlike traditional methods that focus on the asset's useful life or time-based factors, the Units of Production Method considers the actual usage or output of the asset. This makes it particularly suitable for assets whose wear and tear are directly related to production levels.
4. Applicability to Various Industries: The Units of Production Method is applicable to a wide range of industries where assets contribute to production, such as manufacturing, mining, agriculture, and transportation. It is well-suited for assets like machinery, equipment, vehicles, and tools.
5. Units as a Measure of Productivity: The term "units" in the method refers to the measure of productivity or output that the asset contributes to the production process. This could be expressed in terms of physical units (e.g., number of products manufactured), hours of operation, miles driven, or any other relevant measure.

Methods of Application

1. Determination of Total Estimated Units: The first step in applying the Units of Production Method is to determine the total estimated units the asset is expected to produce or operate over its useful life. This estimation is often based on historical data, industry norms, or engineering assessments.
2. Identification of Units Produced or Used: During each accounting period, the actual number of units produced or used by the asset is identified. This could involve counting the number of products manufactured, tracking machine hours, or any other appropriate measure of activity.
3. Calculation of Depreciation Rate: The depreciation rate is calculated by dividing the cost of the asset by the total estimated units. This rate represents the cost per unit of production or usage. The formula is Depreciation Rate = ( Cost / Total Estimated Units​).
4. Depreciation Calculation: The depreciation expense for a specific period is then calculated by multiplying the depreciation rate by the actual units produced or used during that period. The formula is Depreciation Expense = Depreciation Rate × Units Produced or Used in the Period.
5. Recording Journal Entries: Journal entries are made each accounting period to record the depreciation expense using the Units of Production Method. These entries typically involve debiting the depreciation expense account and crediting the accumulated depreciation account.

Advantages of Units of Production Method

1. Accurate Matching of Expenses: The Units of Production Method provides a more accurate matching of expenses with revenue generation. By tying depreciation to the actual level of activity or productivity, it aligns with the economic reality that assets may depreciate at varying rates based on usage.
2. Suitability for Variable Production Levels: This method is well-suited for assets that experience variable levels of production or usage. It is particularly effective for machinery and equipment whose wear and tear are directly tied to production volume.
3. Reflects Economic Reality: The Units of Production Method reflects the economic reality of certain assets whose value is closely linked to their contribution to production. It provides a more nuanced approach to depreciation, acknowledging that not all assets depreciate uniformly over time.
4. Flexible Application: The method is flexible in its application, allowing businesses to adapt depreciation calculations to changes in production levels. This flexibility is valuable in industries with fluctuating production demands.

Considerations for Units of Production Method

1. Accurate Estimation of Total Units: The accuracy of the depreciation calculation using this method relies on a precise estimation of the total units the asset is expected to produce or operate over its useful life. Changes in production expectations can impact depreciation accuracy.
2. Challenges in Estimating Units: For certain assets, especially those with unpredictable usage patterns, estimating the total units can be challenging. This is particularly relevant in industries with variable demand or technological advancements.
3. Complexity of Calculation: While the concept of the Units of Production Method is straightforward, the calculation process can be complex, especially if there are variations in the measurement units or if the asset undergoes modifications that affect its productivity.
4. Impact on Financial Statements: The variability in depreciation expenses resulting from changes in production levels can impact financial statements. Companies should be mindful of the potential effects on reported net income and communicate effectively with stakeholders.

Comparison with Other Depreciation Methods

1. Units of Production vs. Straight-Line: The Units of Production Method links depreciation to actual usage, while straight-line depreciation spreads the cost evenly over an asset's useful life. The former is suitable for assets with variable productivity, while the latter provides a stable expense pattern.
2. Units of Production vs. Double Declining Balance: Both methods are considered accelerated depreciation techniques, but the Units of Production Method is based on actual usage or output, while double declining balance applies a fixed percentage to the remaining book value. The choice between them depends on the nature of the asset's depreciation.
3. Units of Production vs. Sum-of-Years Digits: The Units of Production Method is based on actual usage, while the Sum-of-Years Digits method relies on a fractional formula. The former is more straightforward in its application, while the latter offers flexibility in adjusting the depreciation pattern.

The Bottom Line

The Units of Production Method represents a valuable approach to depreciation, particularly for assets whose value is closely tied to their level of production or usage. This method provides a more accurate reflection of an asset's decreasing value by aligning depreciation with the actual activity it contributes to. While considerations such as accurate estimation of total units and the potential complexity of calculations exist, the Units of Production Method offers advantages in terms of accurate expense matching, suitability for variable production levels, and flexibility in application. As part of a comprehensive depreciation strategy, this method contributes to accurate financial reporting and effective resource management for businesses across various industries.