Process costing is used when production is continuous and units are identical (or nearly identical). Costs are collected process-wise (Process 1, Process 2, etc.) and then averaged over the output.
Because there is often loss (wastage) and work-in-progress (WIP) at different stages of completion, process costing uses concepts like:
Process costing is a method of costing in which costs are accumulated for each process/department for a period and then cost per unit is computed by dividing process cost by process output (after considering losses and WIP).
A process account summarises:
A simple format idea:
Normal loss is the expected loss under efficient operating conditions (e.g., evaporation, unavoidable wastage).
Treatment (exam points):
Example idea: If input is 1,000 units and normal loss is 10%, normal loss = 100 units, effective output = 900 units.
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Cost accounting is a form of managerial accounting that aims to capture a company's total cost of production by assessing the variable costs of each step of production as well as fixed costs, such as a lease expense.
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Process costing is used when production is continuous and units are identical (or nearly identical). Costs are collected process-wise (Process 1, Process 2, etc.) and then averaged over the output.
Because there is often loss (wastage) and work-in-progress (WIP) at different stages of completion, process costing uses concepts like:
Process costing is a method of costing in which costs are accumulated for each process/department for a period and then cost per unit is computed by dividing process cost by process output (after considering losses and WIP).
A process account summarises:
A simple format idea:
Normal loss is the expected loss under efficient operating conditions (e.g., evaporation, unavoidable wastage).
Treatment (exam points):
Example idea: If input is 1,000 units and normal loss is 10%, normal loss = 100 units, effective output = 900 units.
Treatment:
Often some units are not fully completed at the end of the period (closing WIP). For fair costing, we convert these partly completed units into equivalent completed units.
Equivalent production means the number of complete units that could have been produced with the work done.
Example: 200 units that are 50% complete are equal to 100 equivalent complete units.
Why needed:
A simple step approach (weighted average):
Process A data (weighted average, simplified):
Costs:
Step 1: Normal loss Normal loss = 10% of 1,000 = 100 units Scrap value credit = 100 × ₹2 = ₹200
Step 2: Equivalent units Materials EUP:
Conversion EUP:
Step 3: Cost per equivalent unit Materials cost to allocate = 10,000 (no separate scrap credit here because scrap is credited to process overall) Conversion cost to allocate = 6,000
Material cost per EUP = 10,000 / 900 = ₹11.111... Conversion cost per EUP = 6,000 / 850 = ₹7.0588...
Total cost per completed unit (approx.) = 11.111 + 7.059 = ₹18.17
Step 4: Valuation
Units transferred (800):
Closing WIP (100):
Check (approx.): 14,535.8 + 1,464.0 = 15,999.8 ≈ 16,000 (rounding differences).
Note: In full exam problems, you may be asked to show a complete process account and treatment of abnormal loss/gain separately.
Sometimes output is transferred from one process to another at a price including profit to evaluate process performance. This is called inter-process profit. (Only basic awareness is expected unless specified.)
From this topic
Main features of process costing (any three):
Other features include inter-process transfers and frequent existence of WIP and normal loss.
Treatment of normal loss in process costing:
Hence, normal loss increases the cost per good unit unless there is scrap recovery.
Equivalent production (EUP) means expressing incomplete production (WIP) in terms of equivalent completed units. Because materials and conversion may be added at different stages, EUP is often computed separately for (i) materials and (ii) conversion (labour + overhead).
Worked example (weighted average style): Units introduced = 1,000 Units completed & transferred = 800 Closing WIP = 100 units Normal loss = 100 units (so total accounted: 800 + 100 + 100 = 1,000) Completion of closing WIP: Materials 100% (materials added at start), Conversion 50%
Step 1: Compute EUP for materials
Step 2: Compute EUP for conversion
Step 3 (how it is used):
Conclusion: EUP ensures fair valuation of WIP and correct unit cost when production is incomplete.