Labour Costing & Wage Systems: Piece Rate, Time Rate, Halsey Plan

Labour Costing Fundamentals

What is Labour Cost?

Labour cost is the total remuneration paid to employees for their services, including:

• Basic wages (time rate or piece rate)
• Allowances (overtime, bonus, incentives)
• Benefits (provident fund, medical, housing)
• Employer’s contribution (PF, gratuity, insurance)

Why it matters? Labour is often the second-largest cost after materials in manufacturing (e.g., 30-40% of total cost in garment factories). Proper costing ensures profitability and fair wages.

Labour Costing vs. Labour Cost Control

Wage Systems: How Companies Pay Workers

Three main systems are used in Nepal’s manufacturing (e.g., brick kilns, garment factories, carpentry):

1. Time Rate System

Definition: Workers are paid based on time worked, not output. Formula:

Wages = Hourly Rate × Hours Worked

Example: A carpenter in Kathmandu earns Rs 450/hour and works 8 hours/day. Daily wage = Rs 450 × 8 = Rs 3,600.

Advantages & Disadvantages

When to Use?

• Jobs where output is hard to measure (e.g., security guards, cleaners).
• Repetitive tasks where speed doesn’t matter (e.g., assembly line inspectors).

2. Piece Rate System

Definition: Workers are paid per unit produced (e.g., Rs 10 per brick, Rs 50 per shirt). Formula:

Wages = Piece Rate × Number of Units Produced

Example: A brick kiln worker earns Rs 5 per brick. If they make 500 bricks/day: Daily wage = Rs 5 × 500 = Rs 2,500.

Types of Piece Rates

Advantages & Disadvantages

3. Halsey Plan (Premium Bonus System)

Definition: A hybrid system combining time rate + bonus for efficiency. Formula:

Bonus = (Time Saved × Time Rate) × 50%
Total Wages = (Actual Time × Time Rate) + Bonus

Example:

• Standard time for a job: 12 hours.
• Time rate: Rs 40/hour.
• Actual time taken by Mr. A: 10 hours.

Step 1: Calculate time saved = 12 – 10 = 2 hours. Step 2: Bonus = (2 × Rs 40) × 50% = Rs 40. Step 3: Base wages = 10 × Rs 40 = Rs 400. Total wages = Rs 400 + Rs 40 = Rs 440.

Comparison Table

Real-World Applications in Nepal

1. Garment Factories (e.g., Himalayan Textile Mills, Kathmandu)

• System Used: Piece Rate (Rs 50–100 per shirt).
• Why? Workers are paid per shirt sewn, increasing output.
• Challenge: Quality control (some workers rush, causing defects).

2. Brick Kilns (e.g., Bhaktapur Brick Industry)

• System Used: Piece Rate (Rs 3–5 per brick).
• Why? Workers are paid per brick made, reducing idle time.
• Challenge: Seasonal demand (rainy season slows production).

3. Carpenters & Furniture Makers (e.g., Patan Woodcraft)

• System Used: Halsey Plan (base wage + bonus for finishing early).
• Why? Encourages efficiency without sacrificing quality.

Worked Example: Labour Costing in a Kathmandu Retail Shop

Scenario: A small Kathmandu retail shop employs 5 workers to pack and label orders. The shop uses a mixed wage system:

• 2 workers on time rate (Rs 350/hour, 8 hours/day).
• 3 workers on piece rate (Rs 15 per order packed).

Data for a day:

• Time-rate workers: Worked 7 hours/day (due to slow orders).
• Piece-rate workers: Packed 200 orders/day.

Calculations:

1. Time Rate Workers

Wages = Hourly Rate × Hours Worked
= Rs 350 × 7 hours
= **Rs 2,450 per worker**
Total for 2 workers = Rs 2,450 × 2 = **Rs 4,900**

2. Piece Rate Workers

Wages = Piece Rate × Number of Orders
= Rs 15 × 200 orders
= **Rs 3,000 per worker**
Total for 3 workers = Rs 3,000 × 3 = **Rs 9,000**

Total Labour Cost for the Day

Time Rate + Piece Rate = Rs 4,900 + Rs 9,000 = **Rs 13,900**

Allocation to Products

If the shop sells:

• 100 orders of Rs 500 each (high-margin).
• 100 orders of Rs 200 each (low-margin).

Labour cost per order:

Total labour cost = Rs 13,900
Total orders = 200
Labour cost per order = Rs 13,900 ÷ 200 = **Rs 69.50**

Profit Impact:

• High-margin orders: Rs 500 – Rs 69.50 = Rs 430.50 profit.
• Low-margin orders: Rs 200 – Rs 69.50 = Rs 130.50 profit.

Insight: The shop should prioritise high-margin orders to maximise profit, even if labour costs are fixed per order.

Labour Cost Variances (Exam Focus)

Companies compare actual wages vs. standard wages to find variances:

1. Labour Rate Variance (Difference in hourly rate).
2. Labour Efficiency Variance (Difference in time taken).

Formula:

Labour Rate Variance = (Actual Rate – Standard Rate) × Actual Hours
Labour Efficiency Variance = Standard Rate × (Actual Hours – Standard Hours)

Example:

• Standard: 10 hours at Rs 40/hour = Rs 400.
• Actual: 12 hours at Rs 35/hour = Rs 420.

Labour Rate Variance = (Rs 35 – Rs 40) × 12 = **-Rs 60 (favourable)**
Labour Efficiency Variance = Rs 40 × (12 – 10) = **+Rs 80 (unfavourable)**
Net Variance = -Rs 60 + Rs 80 = **+Rs 20 (unfavourable)**

Interpretation:

• Rate variance is favourable (paid less per hour).
• Efficiency variance is unfavourable (took more time).
• Net result: Rs 20 more than standard.

Exam Tip: How to Score Full Marks

1. Understand the wage system formulas – Memorise time rate, piece rate, and Halsey plan calculations.
2. Practice numericals – Always show step-by-step working (e.g., time saved, bonus calculation).
3. Compare systems – Examiners love tables comparing time rate vs. piece rate vs. Halsey.
4. Real-world application – Relate to Nepali industries (garment, brick, carpentry).
5. Variance analysis – If asked about efficiency, calculate both rate and efficiency variances.
6. Avoid common mistakes:
   • Forgetting to convert hours to decimal (e.g., 1.5 hours = 1.5, not 1 hour 30 mins).
   • Misapplying Halsey’s 50% bonus rule (it’s only 50% of time saved).
   • Ignoring overtime in time rate calculations.

Summary Flowchart: Labour Costing Process

flowchart TD
    A["Start"] --> B["Identify Wage System<br/>(Time/Piece/Halsey)"]
    B --> C{"Time Rate?"}
    C -->|"Yes"| D["Calculate: Hours × Rate"]
    C -->|"No"| E{"Piece Rate?"}
    E -->|"Yes"| F["Calculate: Units × Rate"]
    E -->|"No"| G["Halsey Plan<br/>1. Find Time Saved<br/>2. Calculate Bonus (50% of saved time × rate)<br/>3. Add to base wages"]
    D --> H["Allocate to Products"]
    F --> H
    G --> H
    H --> I["Check Variances<br/>(Rate & Efficiency)"]
    I --> J["Adjust Future Planning"]

Key Formulas to Remember

Final Checklist Before Exam

✅ Can you calculate wages under all three systems? ✅ Do you know when to use each system (e.g., piece rate for bricks)? ✅ Can you compare advantages/disadvantages in a table? ✅ Can you solve a variance problem? ✅ Can you relate to a Nepali business (e.g., garment factory, brick kiln)?

Labourers stacking bricks in a traditional kiln (piece rate system). (Image: Frameofashik, CC BY-SA 4.0, via Wikimedia Commons) Workers on piece rate earning per shirt sewn. (Image: Tareq Salahuddin from Dhaka, Bangladesh, CC BY 2.0, via Wikimedia Commons)