CMA Intermediate · Cost Accounting
Batch Costing for CMA Intermediate Cost Accounting
Batch costing is a method where a group of identical units is produced together and treated as one job. You collect costs for the whole batch, then divide by units to get cost per unit. Solve it by preparing a batch cost sheet, then using the EBQ formula √(2DS ÷ C) to find the best batch size.
What this chapter covers
Batch costing is a form of job costing. Instead of one unique job, you make a lot of similar units together, such as a batch of 500 shirts or 2,000 components. Costs are collected for the batch, and cost per unit is the batch cost divided by the good units produced.
The chapter has four parts. First you learn what a batch is and where the method is used. Then you prepare the cost sheet for a batch, with material, labour, direct expenses and overheads. Next comes Economic Batch Quantity (EBQ), the batch size that balances set-up cost against carrying cost. Last, you handle spoilage, defectives and similar issues that change the cost per unit.
This chapter links closely to the rest of Cost Accounting. Cost sheet layout comes from the cost sheet chapter. Overhead absorption comes from overheads. The EBQ formula looks like the EOQ formula in material costing. Job costing and process costing give the base for treating abnormal loss and scrap. If these are firm, batch costing is a scoring chapter.
Batch costing is short, formula-driven and numerical, so it rewards practice more than reading. A question can be a standalone MCQ on EBQ or a full written problem asking for a batch cost sheet, cost per unit and price with profit. These need layout, correct treatment of spoilage and a clean EBQ calculation, all of which earn step marks even if one figure goes wrong. It also reinforces cost sheets and overheads, which are used in other chapters, so the effort pays back across the paper.
Batch Costing: topics in the order to study them
- 1Batch Costing: Meaning and FeaturesStart here to understand what a batch is, where the method fits and how it differs from job and process costing.
- 2Cost Sheet and Accounting for a BatchOnce the idea is clear, learn to build the batch cost sheet, since every other topic changes a figure on it.
- 3Economic Batch Quantity (EBQ)EBQ needs the set-up and carrying cost ideas from the cost sheet, and it is the most formula-based part of the chapter.
- 4Treatment of Spoilage, Defectives and Other Batch IssuesStudy this last because it adjusts the cost sheet and per-unit cost you already know, and needs the earlier topics to apply correctly.
How to prepare Batch Costing
Aim to understand the logic first and then drill numericals. Most marks come from clean layout and correct treatment of each cost item.
- Read the meaning and features once and write a two-line difference between job, batch and process costing.
- Learn the batch cost sheet layout: direct material, direct labour, direct expenses, prime cost, factory overheads, total cost, cost per unit, then profit and selling price.
- Solve three or four cost sheet problems, writing each heading even when the figure is small.
- Learn EBQ = √(2DS ÷ C), where D is annual demand, S is set-up cost per batch and C is carrying cost per unit per year. Practise finding number of batches and total cost at EBQ.
- For spoilage and defectives, decide first whether the loss is normal or abnormal, whether it is for a particular batch, and what the scrap or rework value is. Then adjust cost.
- Attempt MCQs on EBQ and spoilage under time, then do one full written question in 14 minutes.
- Revise formulas and the cost sheet format on the last day, and redo the questions you got wrong.
Common mistakes in Batch Costing
Dividing batch cost by units started instead of good units.
Fix: Always check the question for spoilage and divide by good units completed.
Mixing up set-up cost with carrying cost in the EBQ formula.
Fix: Write the meaning of D, S and C before substituting any values.
Using monthly demand with annual carrying cost.
Fix: Convert demand and carrying cost to the same period, usually a year, before using the formula.
Charging abnormal spoilage to the batch.
Fix: Spread only normal loss over good units and send abnormal loss to the costing profit and loss account.
Forgetting to deduct scrap value of spoiled units.
Fix: Underline scrap value in the question and net it against the cost of spoilage.
Skipping the layout and writing only the final cost per unit.
Fix: Write the cost sheet in order so that each correct line earns marks even if later figures are wrong.
Last-day revision: Batch Costing
- A batch is a group of identical units produced together and costed as one job.
- Cost per unit = total batch cost ÷ good units produced.
- Set-up cost is incurred once per batch, so it is spread over the batch quantity.
- EBQ = √(2DS ÷ C), with D as annual demand, S as set-up cost per batch and C as carrying cost per unit per year.
- At EBQ, total set-up cost equals total carrying cost.
- Number of batches in a year = annual demand ÷ EBQ.
- Normal spoilage cost is absorbed by good units.
- Abnormal spoilage is charged to the Costing Profit and Loss Account, not to the batch.
- Scrap value of normal spoilage reduces the batch cost.
- Normal rework cost is charged to the batch (if specific to it) or to production overheads (if common to all jobs). Abnormal rework cost is charged to the Costing Profit and Loss Account.
- Write the cost sheet with all headings and show workings for step marks.
Batch Costing practice questions
- Which of the following best describes a batch in batch costing?
- Which of the following is the most appropriate treatment of the cost of a special tool made exclusively for one batch and scrapped after its…
- Which statement about the features of batch costing is correct?
- Kaveri Auto Components makes a batch of 500 gear sets. Batch costs: materials ₹1,20,000, direct wages ₹60,000, and set-up cost ₹15,000 incur…
- In batch costing, a batch of 500 units is produced for a specific customer order. Spoilage that is normal and arises due to the nature of th…
- Under batch costing, the Economic Batch Quantity (EBQ) is the batch size that minimises the sum of:
- In batch costing, the Economic Batch Quantity (EBQ) is the batch size that:
- In batch costing, the cost per unit of a completed batch is obtained by:
Batch Costing in other exams
The same ground in other exams, if you are preparing for more than one or want another angle on it.
Batch Costing: frequently asked questions
What is batch costing in simple words?
It is a costing method for goods made in lots of identical units. You collect all costs of the lot and divide by the good units to get cost per unit.
What is the formula for EBQ?
EBQ = √(2DS ÷ C). D is annual demand, S is set-up cost per batch and C is carrying cost per unit per year. It gives the batch size with the lowest combined set-up and carrying cost.
How is batch costing different from job costing?
A job is usually one unique order for a customer. A batch is a group of identical units made together, so cost per unit is found by dividing the batch cost by the number of units.
How should I treat spoilage in a batch cost sheet?
Treat normal spoilage as part of the batch cost, after deducting any scrap value. Abnormal spoilage is separated and written off to the costing profit and loss account.
Is batch costing asked as MCQ or as a written question?
It can come in both forms. MCQs usually test EBQ or cost per unit, while written questions ask for a full cost sheet with spoilage and a selling price.