For businesses in industries such as mining, oil and gas, or timber, their primary assets are natural resources that are consumed or depleted over time. The IRS provides a way to account for this reduction in value through a tax deduction called depletion.
Depletion is similar to depreciation, but it applies specifically to the extraction of natural resources. Understanding how to calculate and claim this deduction is essential for any business involved in mining, drilling, or harvesting timber. This guide will explain the rules for depletion expenses, the methods for calculating them, and how to track the associated costs.
Depletion is a non-cash deduction that allows a business to recover its capital investment in a mineral property or standing timber as the resource is extracted and sold. As outlined in IRS Publication 535, this deduction is not a simple line-item expense but a specific calculation that must be figured annually.
The depletion deduction is reported on the appropriate business tax form, typically as part of the Cost of Goods Sold or as a separate deduction on forms such as Schedule C or Schedule E (for royalties).
The rules for depletion are specific and vary depending on the type of natural resource being depleted.
To claim a depletion deduction, you must have an economic interest in the mineral property or standing timber. According to the IRS, you have an economic interest if you have acquired an investment in the resource, and you must look to the income from the extraction of that resource to get your investment back. This means that both property owners (lessors) and operators (lessees) can potentially claim depletion.
Depletion applies to:
The IRS provides two methods for calculating depletion for mineral property. For timber, only the cost method is allowed.
For mineral properties, you must calculate depletion under both methods and deduct the one that results in the larger deduction for the year.
Just like with depreciation, you must reduce the adjusted basis of your property by the amount of depletion you claim each year.
The cost depletion formula is generally:
(Adjusted Basis / Total Recoverable Units) × Units Sold During Year
The depletion deduction is reported on your main business tax form (e.g., Schedule C, Form 1120). For timber-related activities, you must also complete and attach Form T (Timber) to your income tax return.
While Fyle does not calculate the depletion deduction itself, it is a critical tool for tracking the various costs that establish the "basis" of your natural resource asset—the starting point for any depletion calculation.