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Microlesson · 5-min read

Job Costing — Accumulation of Labour & Overheads and Treatment of Defective/Spoiled Work

## Job Costing — Collecting Costs & Handling Defectives

After direct material, a job absorbs labour and overheads, and may produce spoiled/defective work that must be accounted for.

### B. Labour Cost

  • All direct employee (labour) cost is collected from job time cards / sheets and accumulated for a period or volume of activity.
  • Time booked in job-time and idle-time cards is valued at appropriate rates and entered into the cost accounting system.
  • Indirect labour costs are taken from the payroll books and posted against standing-order / expense-code numbers in the overhead ledger.

### C. Overheads

  • Overheads are collected under suitable standing order numbers; selling & distribution overheads against cost account numbers.
  • Total overheads are apportioned to service and production departments on a suitable basis.
  • Service department expenses are re-apportioned to production departments, and the total production-department overhead is then applied (absorbed) to products on a realistic basis.

### D. Treatment of Spoiled & Defective Work

CircumstanceTreatment
Loss due to normal reasonsIf a normal defective rate is established and actuals are within the normal limit, the cost of rectification/loss is charged to the entire output. If defectives substantially exceed normal limits, the excess (beyond normal) is written off to the Costing P&L Account.
Loss due to abnormal reasonsTreated as abnormal cost — the cost of rectification/loss is written off to the Costing P&L Account.

Key principle: normal losses are absorbed by good production; abnormal losses never burden the product cost — they hit the Costing P&L.

⚠️ Common exam mistakes

  • Charging abnormal rectification/spoilage cost to the job/product instead of writing it off to the Costing P&L Account.
  • Charging the entire defective loss to output even when defectives exceed normal limits — only the within-normal portion is charged to output; the excess is written off.
  • Treating cash discount or other finance items as labour/overhead — these belong elsewhere.
  • Forgetting to re-apportion service department overheads to production departments before absorbing into products.
Reference:
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