Depletion Accounting

A method of calculating the depreciation of a wasting asset based on the rate at which it is being used. For example, a coal mine could be depreciated on the basis of the rate at which coal is extracted from it.
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Detailed Definition

Depletion Accounting refers to the systematic allocation of the cost of a wasting asset over the period it is being used. A wasting asset is any natural resource, such as minerals, oil, natural gas, and timber, that diminishes over time as it is converted into sales and profits. Depletion is particularly crucial in industries like mining, oil, and gas, where it serves to provide a more accurate picture of both the financial performance and the resource levels over time. The primary objective of depletion accounting is to match the cost of the natural resource against the revenue it generates.

Types of Depletion

  1. Percentage Depletion: This involves applying a fixed percentage rate based on the gross income derived from the resource, regardless of the property’s cost.
  2. Cost Depletion: This involves determining the total quantity of the resource and then calculating the cost per unit that can be depleted in that period.

Examples

  • Oil Field: An oil company extracts 10,000 barrels of oil in a year from a known reserve of 100,000 barrels. If the land and extraction-related costs are valued at $1 million, the cost depletion per barrel is $10.000/bbl.
  • Coal Mine: A coal mining company extracts 100,000 tons of coal out of an estimated reserve of 1,000,000 tons. If the mine was acquired for $500,000, the depletion per ton is calculated at $0.50/ton.

Frequently Asked Questions

How is depletion different from depreciation?

Depletion is specifically used for natural resources that get consumed (or ‘wasted’) while depreciation applies to tangible assets like machinery, buildings, equipment which degrade over time.

Is depletion calculated annually?

Yes, depletion is typically calculated on an annual basis as part of the end-of-year accounting processes.

What industries commonly use depletion accounting?

Mainly extractive industries such as mining, petroleum, gas extraction, and timber harvesting.

Can depletion be used for intangible assets?

No, depletion is used for natural resources. Intangible assets would use another method such as amortization.

How does percentage depletion work?

Percentage depletion applies a consistent percentage to the gross revenue derived from the resource, without considering the initial cost.

What is required to calculate cost depletion?

To calculate cost depletion, information including the total capitalized cost of the resource, the total recovered quantities, and the remaining extractable quantities are needed.

  1. Depreciation: A method of allocating the cost of a tangible fixed asset over its useful life.
  2. Wasting Asset: A resource that gets depleted over time through usage, extraction, or consumption.
  3. Residual Value: The estimated amount that a company can realize upon disposal of an asset after its useful life.
  4. Intangible Asset: Non-physical assets such as patents, copyrights, and trademarks.

Online References

  1. Investopedia on Depletion
  2. IRS Depletion Guidelines

Suggested Books for Further Studies

  1. “Intermediate Accounting” by Donald E. Kieso, Jerry J. Weygandt, and Terry D. Warfield.
  2. “Accounting Principles” by Jerry J. Weygandt, Paul D. Kimmel, and Donald E. Kieso.
  3. “Financial & Managerial Accounting” by Carl Warren, James M. Reeve, and Jonathan Duchac.

Accounting Basics: “Depletion Accounting” Fundamentals Quiz

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