Principles of Financial Accounting: Plant Assets and Intangibles - Natural Resources Depletion

What It Is

Natural resources depletion refers to the accounting treatment for the consumption of non-renewable resources, such as oil, gas, and minerals. This concept matters in financial accounting because it affects the company's income statement and balance sheet. For example, if a company extracts $10,000 worth of oil from a reserve, it must recognize the depletion expense on its income statement.

Key Concepts & Formulas

• Depletion Expense: The cost of using up a natural resource over its useful life. Depletion expense = (Cost of resource - Residual value) / Useful life. Example: A company extracts oil worth $100,000 with a residual value of $20,000 and a useful life of 10 years. Depletion expense = ($100,000 - $20,000) / 10 = $8,000 per year.
• Depletion Method: The method used to calculate depletion expense, such as units-of-production or percentage-of-completion.
• Reserve: The amount of natural resource remaining at the end of the period.
• Gross Income from Sales: The revenue from selling natural resources, minus any direct costs.
• Net Income from Sales: The gross income from sales, minus depletion expense and other indirect costs.
• Depletion Rate: The rate at which the natural resource is being used up, calculated as depletion expense / Cost of resource.
• Unearned Depletion: The difference between the depletion expense and the actual cost of extracting the resource.
• Accumulated Depletion: The total depletion expense recognized over the life of the resource.

Journal Entry Examples

1. Depletion Expense Dr. Depletion Expense $8,000 Cr. Accumulated Depletion $8,000 Explanation: Debit Depletion Expense to recognize the expense, and credit Accumulated Depletion to record the decrease in the reserve.

2. Sale of Natural Resource Dr. Cash $10,000 Cr. Gross Income from Sales $10,000 Cr. Depletion Expense $8,000 Explanation: Debit Cash to record the sale, credit Gross Income from Sales to recognize revenue, and credit Depletion Expense to record the expense.

Common Mistakes

1. Mistake: Forgetting to credit Accumulated Depletion when recognizing depletion expense. Correction: Remember to credit Accumulated Depletion to record the decrease in the reserve.
2. Mistake: Confusing depletion expense with depreciation expense. Correction: Depletion expense is for natural resources, while depreciation expense is for tangible assets.
3. Mistake: Not considering the residual value when calculating depletion expense. Correction: Subtract the residual value from the cost of the resource to calculate the depletion expense.

Exam Tips

1. Tip: Remember that depletion expense is a non-cash expense, so it will not affect cash flow.
2. Tip: Be careful when reversing normal balances, as depletion expense is a debit.
3. Tip: Consider the useful life of the resource when calculating depletion expense.

Quick Practice

1. A company extracts $20,000 worth of coal from a reserve with a residual value of $5,000 and a useful life of 5 years. What is the depletion expense for the year? Answer: $3,000 (=$15,000 / 5 years) Explanation: Calculate the depletion expense using the formula: Depletion expense = (Cost of resource - Residual value) / Useful life.

2. A company sells $15,000 worth of oil, with a depletion expense of $10,000. What is the net income from sales? Answer: $5,000 (=$15,000 - $10,000) Explanation: Calculate the net income from sales by subtracting the depletion expense from the gross income from sales.

Last-Minute Cram Sheet

1. Depletion expense is a non-cash expense.
2. Depletion expense = (Cost of resource - Residual value) / Useful life.
3. Accumulated Depletion is a contra-asset account.
4. Depletion expense is recognized on the income statement.
5. Residual value is subtracted from the cost of the resource to calculate depletion expense.
6. Depletion expense is a debit.
7. Depletion expense is not a cash expense.
8. Useful life is the period over which the resource is expected to be used up.
9. Gross Income from Sales = Revenue - Direct costs.
10. Net Income from Sales = Gross Income from Sales - Depletion expense.