ASCM-L07 — Absorption Costing
Understanding how all production costs, including overheads, are absorbed into the cost of products and services.
Learning Objectives
By the end of this lesson students should be able to:
• understand absorption costing
• distinguish direct and indirect costs
• understand production overheads
• calculate overhead absorption rates
• calculate full production cost
• prepare absorption costing statements
• answer examination-style questions
CONCEPT OVERVIEW
What is Absorption Costing?
Batch costing is a costing method used when identical products are manufactured in groups or batches.
Each batch is treated as a separate cost unit and costs are accumulated for the entire batch.
Why Use Absorption Costing?
✓ Products produced in groups
✓ Each batch treated as one cost unit
✓ Costs accumulated per batch
✓ Cost per unit calculated after batch completion
✓ Common in manufacturing industries
ADVANTAGES & LIMITATIONS
Advantages
✓ Includes all production costs
✓ Suitable for inventory valuation
✓ Widely used in practice
✓ Provides full production cost
✓ Supports pricing decisions
Limitations
✓ Overhead allocation may be arbitrary
✓ More complex than basic costing methods
✓ Can distort costs if absorption bases are inappropriate
✓ May encourage overproduction
COST COMPONENTS
Prime Cost
Prime Cost
=
Direct Materials
+
Direct Labour
+
Direct Expenses
Total Production Cost
Production Cost
=
Prime Cost
+
Production Overheads
Example
| Cost Element | Amount (£) |
|---|---|
| Direct Materials | 8,000 |
| Direct Labour | 5,000 |
| Direct Expenses | 1,000 |
| Production Overheads | 4,000 |
| Total Cost | 18,000 |
PRODUCTION OVERHEADS
What are Production Overheads?
Production overheads are indirect production costs that cannot be directly traced to individual units.
Examples:
✓ Factory Rent
✓ Factory Insurance
✓ Factory Supervisor Salary
✓ Machine Depreciation
✓ Factory Electricity
Why Must Overheads Be Absorbed?
Overheads are necessary production costs.
If ignored, product costs would be understated and profits may be overstated.
OVERHEAD ABSORPTION RATES (OAR)
Formula
Overhead Absorption Rate=Budgeted Production OverheadsBudgeted Activity Level\text{Overhead Absorption Rate}=\frac{\text{Budgeted Production Overheads}}{\text{Budgeted Activity Level}}
Common Bases
| Basis | Example |
|---|---|
| Labour Hours | £ per labour hour |
| Machine Hours | £ per machine hour |
| Units Produced | £ per unit |
| Labour Cost | % of labour cost |
WORKED EXAMPLES
Example 1 — Absorbing Overheads
OAR:
£4 per labour hour
Job Labour Hours:
250
Overheads Absorbed:
250 × £4
=
£1,000
Example 2 — Full Cost Calculation
Direct Materials:
£6,000
Direct Labour:
£3,000
Direct Expenses:
£500
Absorbed Overheads:
£1,500
Total Cost:
£11,000
Example 3 — Cost Per Unit
Total Production Cost:
£25,000
Units Produced:
5,000
Cost Per Unit:
£25,000 ÷ 5,000
=
£5
UNDER & OVER ABSORPTION
Over-Absorption
Absorbed Overheads
>
Actual Overheads
Overheads have been overcharged.
Under-Absorption
Absorbed Overheads
<
Actual Overheads
Overheads have been undercharged.
Structured Practice
Level 1 — Concept Check
Define:
a) Absorption Costing
b) Production Overhead
Level 2 — Application
Explain why production overheads must be included in product costs.
Level 3 – Examination Style Question
Budgeted Production Overheads:
£80,000Budgeted Machine Hours:
20,000Actual Machine Hours Used:
500Calculate:
a) Overhead Absorption Rate
b) Overheads Absorbed
(4 marks)
📌 Additional structured questions are available in the 🎯 Question Papers + YouTube Explanation section.
∗ Additional structured questions are available in the Question Papers and YouTube Explanation section. Students should practise regularly and review video explanations for procedural clarity.
Enrolled students may submit questions from recognised textbooks, past examination papers or other genuine academic material for expert clarification through the Student Doubt Support facility.
ACADEMIC SUPPORT NOTE
📌 Absorption costing is one of the most important AS Cost & Management Accounting topics.
Students should master:
✓ Prime Cost
✓ Production Cost
✓ Production Overheads
✓ Overhead Absorption Rates
✓ Full Cost Calculations
✓ Under and Over Absorption
🎥 Full worked examples are available in the YouTube Learning Library.
📩 Students may submit absorption costing doubts through the Student Doubt Support facility.
Proficiency Check
Learn → Practise → Apply → Evaluate
1. Can you explain absorption costing?
2. Can you calculate prime cost?
3. Can you calculate production cost?
4. Can you calculate overhead absorption rates?
5. Can you calculate absorbed overheads?
6. Can you explain under and over absorption?
If unsure, revisit:
• Prime Cost
• Production Overheads
• OAR Formula
• Worked Examples
Detailed Activity Solutions
Solution to Level 3 question
a)
OAR
£80,000 ÷ 20,000
=
£4 per machine hour
b)
Overheads Absorbed
500 × £4
=
£2,000
HOW THIS TOPIC APPEARS IN THE EXAMINATION
Common examination tasks include:
✓ Prime Cost Calculations
✓ Production Cost Calculations
✓ Overhead Absorption Rates
✓ Absorbed Overhead Calculations
✓ Under and Over Absorption
✓ Absorption Costing Statements
Self-Assessment Checklist
□ I understand absorption costing
□ I can calculate prime cost
□ I can calculate production cost
□ I can calculate OAR accurately
□ I can calculate absorbed overheads
□ I can answer examination questions confidently
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