Standard Costing & Variance Analysis: Methods, Variances & Control

TAKEAWAYS:

• Standard costing assigns predetermined costs to products/services to simplify budgeting and control expenses.
• Variances (material price/quantity, labor rate/efficiency, overhead volume/efficiency) reveal where actual costs deviate from standards.
• Favorable variances (e.g., lower material cost) improve profitability; unfavorable variances (e.g., overtime labor) require investigation.
• Variance analysis helps managers take corrective actions (e.g., renegotiating supplier contracts or retraining workers).
• The accounting cycle for standard costing includes journal entries for variances and adjustments to inventory valuations.
• Real-world applications include Daraz’s inventory cost control, Ncell’s labor efficiency tracking, and NTC’s overhead variance management.

1. What is Standard Costing?

Standard costing is a cost accounting technique where predetermined costs (standards) are set for direct materials, direct labor, and manufacturing overhead. These standards are based on historical data, engineering studies, and industry benchmarks. The goal is to:

• Simplify cost accounting by replacing actual costs with standard costs.
• Provide a benchmark for performance evaluation.
• Highlight variances (differences between actual and standard costs) for corrective action.

Why Use Standard Costing?

• Budgeting & Planning: Helps set realistic cost targets.
• Inventory Valuation: Uses standard costs for financial statements (e.g., balance sheets).
• Performance Measurement: Identifies inefficiencies (e.g., wasted materials, overtime labor).
• Decision Making: Guides pricing, production, and cost control strategies.

2. Setting Standard Costs

Standards are set for three key cost elements:

A. Direct Material Standards

• Standard Quantity (SQ): Amount of material needed per unit (e.g., 2 kg of fabric per shirt).
• Standard Price (SP): Expected cost per unit of material (e.g., Rs. 500/kg).
• Standard Cost (SC) = SQ × SP Example: For a Kathmandu retail shop selling handmade blankets:
  • SQ: 3 kg of wool per blanket.
  • SP: Rs. 800/kg.
  • SC: 3 kg × Rs. 800 = Rs. 2,400 per blanket.

B. Direct Labor Standards

• Standard Hours (SH): Time required per unit (e.g., 2 hours per blanket).
• Standard Rate (SR): Expected wage per hour (e.g., Rs. 300/hour).
• Standard Cost (SC) = SH × SR Example:
  • SH: 2 hours/blanket.
  • SR: Rs. 300/hour.
  • SC: 2 × Rs. 300 = Rs. 600 per blanket.

C. Manufacturing Overhead Standards

• Standard Overhead Rate (SOR): Based on expected overhead costs and activity level (e.g., machine hours). Example:
  • Total Overhead Budget: Rs. 500,000.
  • Expected Machine Hours: 10,000 hours.
  • SOR: Rs. 500,000 / 10,000 = Rs. 50/hour.
  • If a blanket requires 1 machine hour, SC = Rs. 50.

3. Variance Analysis: Identifying Deviations

Variances occur when actual costs ≠ standard costs. They are classified as:

• Favorable (F): Actual cost < Standard cost (e.g., lower material price).
• Unfavorable (U): Actual cost > Standard cost (e.g., higher labor wages).

Key Variances in Standard Costing

4. Journal Entries for Variances

Variances are recorded in the general ledger and cost of goods sold (COGS). Here’s how:

Example: Kathmandu Blanket Shop

Given Data:

• Standard Cost per Blanket:
  • Material: Rs. 2,400 (3 kg × Rs. 800).
  • Labor: Rs. 600 (2 hours × Rs. 300).
  • Overhead: Rs. 50 (1 machine hour × Rs. 50).
  • Total SC: Rs. 3,050/blanket.
• Actual Production: 1,000 blankets.
• Actual Costs:
  • Material: 3,200 kg @ Rs. 850/kg = Rs. 2,720,000.
  • Labor: 2,200 hours @ Rs. 320/hour = Rs. 704,000.
  • Overhead: Rs. 520,000 (actual).

Step 1: Record Actual Costs

flowchart TD
    A["Raw Materials Purchased\nRs. 2,720,000"] --> B["Raw Materials Inventory\nDebit Rs. 2,720,000"]
    C["Wages Payable\nRs. 704,000"] --> D["Wages Expense\nDebit Rs. 704,000"]
    E["Manufacturing Overhead\nRs. 520,000"] --> F["Overhead Control\nDebit Rs. 520,000"]

Step 2: Apply Standard Costs to Production

• Standard Cost for 1,000 Blankets:
  • Material: 1,000 × 3 kg × Rs. 800 = Rs. 2,400,000.
  • Labor: 1,000 × 2 hours × Rs. 300 = Rs. 600,000.
  • Overhead: 1,000 × 1 hour × Rs. 50 = Rs. 50,000.
  • Total SC: Rs. 3,050,000.

Step 3: Calculate Variances

Step 4: Journal Entries for Variances

flowchart TD
    A["Raw Materials Inventory\nDebit Rs. 2,400,000"] --> B["Work in Progress\nCredit Rs. 2,400,000"]
    C["Wages Expense\nDebit Rs. 600,000"] --> D["Work in Progress\nCredit Rs. 600,000"]
    E["Overhead Control\nDebit Rs. 50,000"] --> F["Work in Progress\nCredit Rs. 50,000"]
    G["Material Price Variance (U)\nDebit Rs. 160,000"] --> H["Raw Materials Inventory\nCredit Rs. 160,000"]
    I["Material Quantity Variance (U)\nDebit Rs. 160,000"] --> J["Work in Progress\nCredit Rs. 160,000"]
    K["Labor Rate Variance (U)\nDebit Rs. 44,000"] --> L["Wages Expense\nCredit Rs. 44,000"]
    M["Labor Efficiency Variance (U)\nDebit Rs. 60,000"] --> N["Work in Progress\nCredit Rs. 60,000"]
    O["Overhead Variance (U)\nDebit Rs. 470,000"] --> P["Overhead Control\nCredit Rs. 470,000"]

5. Causes and Corrective Actions for Variances

6. The Accounting Cycle for Standard Costing

flowchart TD
    A["1. Set Standards\n(SQ, SP, SH, SR, SOR)"] --> B["2. Record Actual Costs\n(Purchases, Labor, Overhead)"]
    B --> C["3. Apply Standard Costs\nto Production"]
    C --> D["4. Calculate Variances\n(MPV, MQV, LRV, LEV, Overhead)"]
    D --> E["5. Journalize Variances\nto Ledger Accounts"]
    E --> F["6. Adjust COGS\nand Inventory Valuation"]
    F --> G["7. Prepare Financial Statements\n(Balance Sheet, Income Statement)"]
    G --> H["8. Analyze & Take Action\n(Corrective Measures)"]

7. Real-World Applications in Nepal

A. Daraz (E-Commerce)

• Application: Uses standard costing to control inventory costs for millions of products.
• How?:
  • Sets standard storage costs per product (e.g., Rs. 50/month per unit).
  • Tracks variances in warehouse space usage (e.g., overstocking vs. underutilized shelves).
  • Adjusts pricing dynamically based on material and labor efficiency variances.

B. Ncell (Telecom)

• Application: Standard costing for customer service labor costs.
• How?:
  • Standard Hours: 5 minutes per customer call.
  • Standard Rate: Rs. 200/hour (Rs. 16.67/minute).
  • Variance Analysis: If average call time increases to 6 minutes, labor efficiency variance is unfavorable.
  • Action: Train agents to reduce call time or hire more staff.

C. NTC (Electricity)

• Application: Overhead cost control for power distribution.
• How?:
  • Standard Overhead Rate: Rs. 10 per unit of electricity distributed.
  • Variance: If actual maintenance costs exceed Rs. 10/unit due to equipment failures, overhead variance is unfavorable.
  • Action: Schedule preventive maintenance to reduce breakdowns.

D. Kathmandu Retail Shop (Handmade Blankets)

• Worked Example:
  • Standard Cost: Rs. 3,050/blanket (as calculated above).
  • Actual Cost: Rs. 3,834/blanket (Rs. 2,720 + Rs. 704 + Rs. 520 for 1,000 blankets).
  • Total Variance: Rs. 784,000 U (Rs. 3,834,000 – Rs. 3,050,000).
  • Impact: If the shop sells blankets at Rs. 5,000 each, the Rs. 784,000 U variance reduces profit by 15.68% per unit.
  • Solution:
    • Negotiate with wool suppliers to reduce material price variance.
    • Implement time-tracking to improve labor efficiency.

8. Advantages and Disadvantages of Standard Costing

9. Exam Tip: How to Score Full Marks

1. Define Clearly:

   • Start with precise definitions (e.g., "Standard costing is a cost accounting technique where predetermined costs are set for materials, labor, and overhead to simplify budgeting and control expenses.").

2. Use Formulas Correctly:

   • Always show formulas before plugging in numbers (e.g., MPV = (AP – SP) × AQ).
   • Label variances as Favorable (F) or Unfavorable (U).

3. Show Workings:

   • For numerical questions, break down calculations step-by-step (e.g., calculate material price variance before quantity variance).
   • Use tables for clarity (like the variance table above).

4. Link to Real-World:

   • Relate answers to Nepali businesses (e.g., Daraz, Ncell, Kathmandu shops).
   • Example: "Like Daraz tracks warehouse space variances, a Kathmandu blanket shop can use standard costing to control wool wastage."

5. Journal Entries:

   • For 5+ marks, draw the accounting cycle flowchart (like the Mermaid diagram above) and explain each step.
   • Use T-accounts for variances (e.g., debit unfavorable variances to COGS).

6. Common Pitfalls:

   • Don’t mix actual and standard costs in journal entries.
   • Don’t forget to classify variances as F/U.
   • Don’t assume all variances are bad—some unfavorable variances (e.g., higher-quality materials) may be justified.

10. Practice Question (Worked Solution)

Question: The Himalayan Textiles Ltd. produces woolen blankets. For the month of Magh, the following data is provided:

• Standard Cost per Blanket:
  • Material: 4 kg @ Rs. 750/kg.
  • Labor: 3 hours @ Rs. 250/hour.
  • Overhead: 2 machine hours @ Rs. 40/hour.
• Actual Production: 5,000 blankets.
• Actual Costs:
  • Material: 21,000 kg @ Rs. 780/kg.
  • Labor: 16,000 hours @ Rs. 260/hour.
  • Overhead: Rs. 350,000.

Required:

1. Calculate all variances.
2. Prepare journal entries for variances.
3. Explain how Himalayan Textiles can use these variances to improve operations.

Solution:

1. Calculate Variances

2. Journal Entries

flowchart TD
    A["Raw Materials Inventory\nDebit Rs. 15,000,000\n(20,000 kg × Rs. 750)"] --> B["Work in Progress\nCredit Rs. 15,000,000"]
    C["Wages Expense\nDebit Rs. 4,000,000\n(15,000 hours × Rs. 250)"] --> D["Work in Progress\nCredit Rs. 4,000,000"]
    E["Overhead Control\nDebit Rs. 400,000\n(10,000 hours × Rs. 40)"] --> F["Work in Progress\nCredit Rs. 400,000"]
    G["Material Price Variance (U)\nDebit Rs. 630,000"] --> H["Raw Materials Inventory\nCredit Rs. 630,000"]
    I["Material Quantity Variance (U)\nDebit Rs. 750,000"] --> J["Work in Progress\nCredit Rs. 750,000"]
    K["Labor Rate Variance (U)\nDebit Rs. 160,000"] --> L["Wages Expense\nCredit Rs. 160,000"]
    M["Labor Efficiency Variance (U)\nDebit Rs. 250,000"] --> N["Work in Progress\nCredit Rs. 250,000"]
    O["Overhead Variance (F)\nCredit Rs. 50,000"] --> P["Overhead Control\nDebit Rs. 50,000"]

3. Corrective Actions

• Material Variances:
  • Renegotiate with suppliers to reduce wool price (Rs. 780 → Rs. 750).
  • Train workers to reduce wastage (21,000 kg → 20,000 kg).
• Labor Variances:
  • Investigate overtime causes (16,000 hours vs. standard 15,000).
  • Provide incentives for faster production (e.g., piece-rate wages).
• Overhead Variance (Favorable):
  • Analyze why overhead was Rs. 50,000 less than standard (e.g., lower energy costs).
  • Maintain efficiency to sustain savings.