Cost Accounting · Introduction to Cost Accounting

Cost Accounting Standards and Installing a Costing System

Updated 10 October 2026 · Fact-checked

Cost Accounting Standards (CAS) are issued by the Cost Accounting Standards Board of ICMAI to bring uniform, consistent principles to cost measurement and presentation. Installing a costing system means studying the business, fixing cost centres, designing records and forms, training staff and reviewing results. In exams, state the steps and the essentials of a good system in order.

Understand Cost Accounting Standards and Installation of a Costing System

A Cost Accounting Standard is a written rule on how a particular cost item should be classified, measured, assigned and disclosed. Without such rules, two firms in the same industry could cost the same product very differently. Their figures could not be compared, and cost data used for pricing, cost audit or government purposes could not be trusted.

In India, ICMAI issues these standards through its Cost Accounting Standards Board (CASB). The standards cover areas such as classification of cost, overheads, materials, employee cost and joint costs. They are called CAS followed by a number. Do not memorise the full list from this page. Study the CAS topics in your list of related topics, and here learn the purpose and the framework.

A standard works with two other pieces. Cost accounting is the system that records and reports costs. Cost audit is the check that cost records are kept properly and are accurate, and that the relevant standards are followed. Standards give the yardstick, the costing system produces the data, and the audit verifies it. Where cost records and cost audit apply to a company is decided by the Companies Act, 2013 and the rules made under it. Learn the idea, and do not quote rule details you are unsure of.

A costing system is the set of procedures, records, forms and reports that a business uses to collect and report cost data. Installing one is a project. It must fit the business, not be copied from another firm. A system that is too complex costs more than the benefit it gives. A system that is too simple gives figures that management cannot use.

Before installation, you look at the nature of the business, the product and process, the size, the organisation structure and the information management needs. After installation, you monitor and revise it. That is why exams ask both for the steps of installation and the essentials of a good system.

Key rules to remember

Essentials of a good costing system: Suitable to the business + Simple + Economical + Accurate + Flexible + Timely reports + Integrated with financial records + Management support; Write these as headed points with one line of explanation each. The exact wording can vary, but cover the ideas.
Steps to install a costing system: Study business → Decide objectives → Fix cost centres and codes → Design records and forms → Define procedures and responsibilities → Train staff → Run and review; Keep this order. It runs from understanding to implementation to follow-up.
Role of a cost accounting standard: Standard = Uniformity + Comparability + Reliability of cost data; Use this as the one-line answer to a question on why standards are needed.
Cost system building blocks: Cost centres + Cost codes + Cost records and forms + Cost reports; These are the practical parts you design during installation.

How to solve Cost Accounting Standards and Installation of a Costing System questions

Questions on this topic are mostly theory: explain, state, discuss or list. Use one method for all of them.

1Read the verb. 'Explain' needs reasons, 'state' needs points, 'discuss' needs points with comment.
2Define the key term in one or two lines, for example CAS, cost audit or costing system.
3Decide whether the question asks for purpose, steps, essentials or practical problems. Pick the matching list from the formula section.
4Write the points as short headed paragraphs or bullets, with one line of explanation each.
5Add a practical link, such as a manufacturing firm or a service business, where the question gives a context.
6Give a short closing line on benefit, for example better control, comparability or decision making.
7If the question gives a case, apply the points to that case instead of writing generic text.

Quickest way: Heading-and-one-line method

When to use it: Use it for short theory questions of 4 to 7 marks, or when you have little time left in the paper.

Write the definition in one line.
Write four to six bold headings from the right list.
Under each heading, write one line of reason or example.
Stop with one line on the benefit. Do not repeat points.

Common mistakes in Cost Accounting Standards and Installation of a Costing System

Writing the steps of installation in random order
Students remember the points but not the logic from study to follow-up.
Fix: Learn the order: study the business, set objectives, design the system, train, run, review.
Confusing essentials of a good system with steps of installation
Both are lists about costing systems and sound similar.
Fix: Essentials are qualities such as simple and flexible. Steps are actions in a sequence. Check which one the question asks.
Saying the standards are issued by the ICAI or by the government
Several bodies in India issue standards, and students mix them up.
Fix: Write that Cost Accounting Standards are issued by the Cost Accounting Standards Board of ICMAI.
Quoting section numbers or rules on cost audit applicability from memory
Students want the answer to look precise.
Fix: Describe the idea in plain words. Give a section number only if you are fully sure of it.
Writing a generic answer without using the case in the question
Students pour out a memorised list when the question names a business.
Fix: Tie at least two points to the given business, such as its product type, size or process.
Treating a costing system as a replacement for financial accounting
Students think cost records stand apart from the books.
Fix: State that a good system is integrated or can be reconciled with financial records.

Worked examples

Example 1

Explain the essentials of a good costing system. (7 marks)

Show the solution

Start with a definition: a costing system is the set of procedures and records used to collect, record and report cost data.
List the essentials as headings.
Suitable: it must fit the nature, size and process of the business.
Simple: it must be easy for staff to understand and operate.
Economical: the cost of running it must be less than the benefit it gives.
Accurate: figures must be reliable, so decisions based on them are sound.
Flexible: it must adapt to changes in products, volume and methods.
Timely: reports must reach management when decisions are needed.
Integrated: it should tie in with the financial accounts so that the two can be reconciled.
Close with the point that it needs the support of management and staff to work.

Answer: A good costing system is suitable, simple, economical, accurate, flexible, timely, integrated with financial records and supported by management.

Example 2

Sundaram Auto Parts Ltd, a mid-sized manufacturer in Coimbatore, plans to install a costing system for the first time. Outline the steps you would follow. (7 marks)

Show the solution

Study the business first: its products, production process, layout, size and organisation structure.
Decide the objectives: for example product costing, cost control, pricing support and reporting to management.
Choose the method of costing that fits. For a firm making many different parts in jobs or batches, job or batch costing may suit. For continuous production, process costing may suit.
Fix cost centres and cost units, and design a cost code so every cost can be classified and traced.
Design the forms and records for material, labour and overheads, such as requisitions, job cards and cost sheets.
Define procedures and fix responsibility for each record and report.
Train staff and explain the system to them to reduce resistance.
Run the system, check the output against the financial accounts, and revise it where needed.

Answer: Study the business, set objectives, choose the costing method, fix cost centres and codes, design records, define procedures, train staff, then run and review the system.

Exam tips

Theory questions on this topic reward structure. Use headings, one line each, in the correct order.
Do not try to recall all standards here. Link this topic to the CAS topics, and in an answer on standards, state purpose, issuing body and benefits.
When a question names a business, apply your points to it. Generic answers lose marks.
For MCQs, watch for options that mix steps and essentials, or name the wrong issuing body. Read all four options before choosing.
If you are unsure of a legal detail on cost audit, describe the purpose in plain words rather than give a number.

Practice questions from Introduction to Cost Accounting

Cost Accounting Standards and Installation of a Costing System in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Cost Accounting Standards and Installation of a Costing System: frequently asked questions

Who issues Cost Accounting Standards in India?

They are issued by the Cost Accounting Standards Board of ICMAI. The standards aim to make cost classification, measurement and disclosure uniform across organisations.

Do I need to memorise the full list of CAS for this topic?

Not for this page. Here you need the role and purpose of standards. The individual standards are covered in separate topics, so study them there.

What are the main steps in installing a costing system?

Study the business, set objectives, choose the method, fix cost centres and codes, design records and procedures, train staff, then run and review. Keep that order in your answer.

What is the difference between cost accounting and cost audit?

Cost accounting is the system that records and reports costs. Cost audit is the verification that the cost records are properly kept and that the cost statements are accurate and follow the standards.