Classification of Costs: Product vs. Period Costs & Their Impact

TAKEAWAYS:

• Product costs (direct materials, direct labor, manufacturing overhead) are capitalized as inventory and expensed only when sold, while period costs are expensed immediately.
• Direct costs (traceable to a product) vs. indirect costs (allocated) determine how costs are assigned to products or services.
• Manufacturing overhead includes both fixed (rent, depreciation) and variable (indirect materials, utilities) costs, requiring allocation methods like predetermined overhead rate.
• Period costs (e.g., marketing, office salaries) appear directly on the income statement as expenses, while product costs flow through inventory → COGS.
• Misclassification (e.g., treating a product cost as a period cost) distorts gross profit and net income, leading to poor decision-making.
• Real-world tie: Daraz’s warehouse rent (fixed overhead) is a product cost for inventory, while its customer service salaries (period cost) are expensed immediately.

1. Definitions: Product Costs vs. Period Costs

Costs are classified based on their behavior and timing in the accounting cycle. The two primary categories are:

Product Costs (Manufacturing Costs)

• Definition: Costs directly associated with producing goods or providing services. These are capitalized (recorded as assets) and expensed only when the product is sold.
• Components:
  • Direct Materials: Raw materials that become part of the final product (e.g., fabric for a Kathmandu garment shop).
  • Direct Labor: Wages of workers directly involved in production (e.g., tailors in a textile factory).
  • Manufacturing Overhead: Indirect costs of production (e.g., factory rent, machine depreciation, utilities).

Period Costs (Non-Manufacturing Costs)

• Definition: Costs not tied to production but incurred to run the business. These are expensed immediately in the period they are incurred.
• Components:
  • Selling Costs: Marketing, advertising, sales commissions (e.g., Daraz’s digital ads).
  • General & Administrative Costs: Office salaries, rent, utilities (e.g., Ncell’s corporate office expenses).

2. How Costs Flow Through Financial Statements

Use this Mermaid flowchart to visualize the accounting cycle for product vs. period costs:

flowchart TD
    A["Product Costs<br/>(Direct Materials + Direct Labor + MOH)"] --> B["Inventory<br/>(Balance Sheet)"]
    B --> C["COGS<br/>(Income Statement)<br/>When Sold"]
    D["Period Costs<br/>(Selling + G&A)"] --> E["Income Statement<br/>(Expensed Immediately)"]
    F["Sales Revenue"] --> G["Gross Profit<br/>(Sales - COGS)"]
    G --> H["Net Income<br/>(Gross Profit - Period Costs)"]

Key Takeaway:

• Product costs sit in inventory until sold (affecting Balance Sheet and Income Statement later).
• Period costs go straight to the Income Statement as expenses.

3. Real-World Examples in Nepal

Example 1: Daraz (E-Commerce Platform)

• Product Cost: Warehouse rent (fixed overhead) is capitalized as part of inventory costs for unsold goods.
• Period Cost: Customer service salaries are expensed immediately because they do not contribute to inventory.

Example 2: Ncell (Telecom)

• Product Cost: Cost of SIM cards (direct materials) and assembly labor (direct labor) are part of inventory until sold.
• Period Cost: Marketing campaigns (e.g., "Happy New Year" promotions) are expensed in the period they are run.

Example 3: Kathmandu Retail Shop (Local Business)

• Product Cost:
  • Fabric for clothes (direct material).
  • Tailor’s wages (direct labor).
  • Factory electricity (manufacturing overhead).
• Period Cost:
  • Shop rent (if not allocated to production).
  • Salesperson’s salary (selling cost).

4. Worked Example: Classifying Costs for a Nepali Business

Scenario: Kathmandu Garment Factory produces traditional Dhaka fabrics. Classify the following costs:

5. Journal Entries: Recording Product vs. Period Costs

Journal Entry for Product Costs (Capitalized as Inventory)

Assume Kathmandu Garment Factory purchases Rs 500,000 of cotton yarn on credit:

| Date       | Description                          | Dr (Debit)       | Cr (Credit)     |
|------------|--------------------------------------|------------------|-----------------|
| 2080-04-01 | Purchased cotton yarn on credit      | Inventory: 500,000 | Accounts Payable: 500,000 |

Journal Entry for Period Costs (Expensed Immediately)

Assume the factory pays Rs 200,000 for marketing ads:

| Date       | Description                          | Dr (Debit)       | Cr (Credit)     |
|------------|--------------------------------------|------------------|-----------------|
| 2080-04-01 | Paid marketing ads                    | Marketing Expense: 200,000 | Cash: 200,000 |

6. T-Accounts: Tracking Product Costs in Inventory

Visualize how product costs accumulate in inventory before being expensed as COGS:

Key Idea:

• Inventory grows with product costs until goods are sold.
• Only then does the cost move to COGS on the income statement.

7. Income Statement Impact: Product vs. Period Costs

8. Common Mistakes & Misclassifications

9. Why Classification Matters: Decision-Making

Case Study: Ncell’s Pricing Strategy

• Product Costs: Cost of SIM cards + assembly labor = Rs 500 per unit.
• Period Costs: Marketing (Rs 200) + office salaries (Rs 100) = Rs 300 per unit.
• Decision: If Ncell prices SIMs at Rs 1,000, the gross profit is Rs 500, but net profit is only Rs 200 after period costs.
• Insight: Misclassifying marketing as a product cost would lead to incorrect pricing decisions.

10. Exam Tip: How to Score Full Marks

1. Define Clearly:
   • Start answers with precise definitions (e.g., "Product costs are expenses capitalized as inventory...").
2. Use Real-World Examples:
   • Link classifications to Nepali businesses (e.g., Daraz’s warehouse rent vs. customer service).
3. Show Journal Entries:
   • Examiners love T-accounts and journal entries with Dr/Cr columns.
4. Highlight Differences:
   • Use a comparison table (like Table 7 above) to contrast product vs. period costs.
5. Avoid Vague Statements:
   • ❌ "Product costs are important."
   • ✅ "Product costs affect gross profit, while period costs impact net income—misclassifying them distorts financial analysis."

11. Practice Question (Exam-Style)

Question: Classify the following costs for Pathao (ride-hailing app) as product or period costs, and justify your answer:

1. Driver salaries
2. App development costs
3. Fuel for driver vehicles
4. Corporate office rent

Answer:

1. Driver salaries → Product cost (direct labor tied to service provision).
2. App development costs → Period cost (software is not inventory).
3. Fuel for vehicles → Product cost (variable overhead for service delivery).
4. Corporate office rent → Period cost (general administrative expense).

12. Summary Table: Key Differences

13. Visual Recap: The Accounting Cycle

flowchart LR
    A["Product Costs<br/>(DM + DL + MOH)"] --> B["Inventory<br/>(Balance Sheet)"]
    B --> C["COGS<br/>(Income Statement)"]
    D["Period Costs<br/>(Selling + G&A)"] --> C
    C --> E["Net Income<br/>(Sales - COGS - Period Costs)"]
    E --> F["Retained Earnings"]

14. Final Checklist for Exams

Before submitting, ensure your answer includes: ✅ Definitions of product vs. period costs. ✅ Components (direct materials, labor, overhead vs. selling/G&A). ✅ Journal entries or T-accounts for at least one example. ✅ Real-world tie (e.g., Daraz, Ncell, or a local business). ✅ Comparison table or flowchart to clarify differences. ✅ Exam tip: Always link classifications to financial statements (Balance Sheet vs. Income Statement).