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Cost Accounting Basics

Part of the CA Foundation study roadmap. Accounting topic accoun-010 of Accounting.

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Cost Accounting Basics

🟢 Lite — Quick Review (1h–1d)

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Cost Accounting records, classifies, allocates, analyses and reports the costs of producing a product or delivering a service so that management can plan, control and make decisions. It differs from Financial Accounting because the output is internal, not statutory.

  • Cost Centre = a location/function where costs are collected (a department, a machine).
  • Cost Unit = a unit of output to which cost is related (1 tonne, 1 kWh, 1 patient-day).
  • Cost Object = anything management wants costed — a product, customer, project, activity.
  • Prime Cost = Direct Material + Direct Labour + Direct Expenses.
  • Works/Factory Cost = Prime Cost + Factory Overheads + Opening WIP − Closing WIP.
  • Cost of Production = Factory Cost + Administration Overheads.
  • Cost of Sales = Cost of Production + Selling & Distribution Overheads + Opening FG − Closing FG.
ElementTreatment
Direct MaterialTraceable; charged to product
Direct LabourTraceable; charged to product
Direct ExpensesTraceable; charged to product
Indirect (Overheads)Allocated / apportioned / absorbed

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Standard content for students with a few days to months.

Defining the Discipline

Cost is the sacrifice of a resource, measured in money, to achieve a specific objective. Costing is the technique of ascertaining costs; Cost Accounting is the recording, presentation and analysis of cost data. The objective is managerial: budgeting, cost control, price fixation, profitability analysis and decision support — not statutory reporting.

Cost Centre, Cost Unit, Cost Object

A Cost Centre is a location, function or item of equipment for which costs can be ascertained (e.g., the welding bay, the canteen, the delivery van). A Cost Unit is a unit of product or service in relation to which costs are expressed (1 tonne of cement, 1 kWh of power, 1 bed-night in a hospital). A Cost Object is anything — product, service, customer, project, activity — for which a separate cost measurement is desired. The unit measures output quantity; the centre collects costs of producing it.

Classification of Costs

Costs are classified by element (material, labour, expenses), by function (production, administration, selling, distribution) and by behaviour (fixed, variable, semi-variable). Direct costs trace to a single cost object; indirect costs (overheads) need allocation, apportionment or absorption.

The Cost Sheet Flow

The ICAI cost sheet follows a strict nine-line sequence. The arithmetic chain is: Material Consumed → Prime Cost → Works Cost → Cost of Production → Cost of Sales → Total Cost per Unit.

StepFormula
Material ConsumedOpening RM + Purchases − Closing RM
Prime CostDM + DL + Direct Expenses
Works CostPrime Cost + Factory OH + Op. WIP − Cl. WIP
Cost of ProductionWorks Cost + Administration OH
Cost of SalesCost of Production + Selling & Dist. OH + Op. FG − Cl. FG
Unit CostCost of Sales ÷ Units Produced

Common exam traps: putting Selling & Distribution Overheads into Factory Cost, and forgetting to add Opening FG or subtract Closing FG at the Cost of Sales stage.

🔴 Extended — Deep Study (3mo+)

Comprehensive coverage for students on a longer study timeline.

Allocation vs Apportionment vs Absorption

These three terms are the single most repeated ICAI cluster. Allocation assigns a whole, identifiable cost to a single cost centre (e.g., a supervisor’s salary to the department they head). Apportionment shares a common cost across two or more cost centres using a suitable base (floor area, labour hours, machine hours, number of employees). Absorption charges the overheads finally to a cost unit or cost object using an absorption rate — typically overhead ÷ activity base (machine hour rate, labour hour rate, percentage of direct wages).

Material valuation methods ICAI tests: FIFO, LIFO, Simple Average and Weighted Average (periodic). For labour, watch overtime premium — the standard ICAI treatment treats non-attributable overtime premium as a factory overhead, not as part of direct wages.

Adjacent Topics and Connections

Cost Accounting connects directly to Marginal Costing (variable vs fixed behaviour), Standard Costing (variance analysis), Budgetary Control (flexible budgets) and Cost Audit (verification of cost records under the Companies (Cost Records and Audit) Rules). It also feeds the Working Capital and Material chapters of CA Inter through EOQ, reorder level and ABC analysis.

Practice Prompts

  1. A factory buys raw material worth ₹4,80,000; opening stock ₹60,000, closing stock ₹75,000. Direct wages ₹2,10,000, direct expenses ₹30,000. Factory overheads ₹1,50,000; administration overheads ₹80,000; selling overheads ₹60,000. Opening WIP ₹20,000, closing WIP ₹35,000. Opening FG ₹40,000, closing FG ₹55,000. Units produced 10,000. Prepare the cost sheet and give unit cost.
  2. A common canteen cost of ₹90,000 is to be shared between three production departments of 1,500, 1,000 and 500 direct labour hours. Compute the apportioned amounts and state whether this is allocation or apportionment.

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