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Fundamentals of Financial and Cost Accounting · Cost, Cost Centre, Cost Unit and Cost Drivers

Cost Object, Profit Centre and Investment Centre Explained

Updated 10 October 2026 · Fact-checked

A cost object is anything for which you measure cost, such as a product, job, process or department. A cost centre is a cost object that collects costs only. A profit centre earns revenue and profit. An investment centre is judged on profit against capital invested, using return on investment.

Understand Cost Object, Profit Centre and Investment Centre

A cost object is any item for which you want to know the cost. It can be a product, a service, a job, a customer, a department or a project. If someone asks "what does this cost?", the thing they name is the cost object.

A responsibility centre is a part of an organisation led by a manager who is held answerable for results. The type of centre depends on what the manager controls. There are four common types: cost centre, revenue centre, profit centre and investment centre.

A cost centre is a location, person or item for which costs are collected. The manager controls costs only, not sales or capital. Examples: a factory's maintenance department, a canteen, a stores section. A revenue centre is judged only on the revenue it earns, such as a sales region.

A profit centre is a segment whose manager controls both costs and revenue. Performance is judged on profit. Example: a car showroom branch of a dealer. An investment centre goes one step further. The manager also controls the capital invested. Performance is judged on profit relative to capital, usually by return on investment (ROI). Example: a separate division of a group that decides on its own new machinery.

Think of it as a ladder of control: cost centre (costs) → profit centre (costs and revenue) → investment centre (costs, revenue and capital). Every cost centre is a cost object, but not every cost object is a cost centre. A product is a cost object, yet it is not a responsibility centre.

Key formulas to remember

Profit centre performance
Profit = Revenue − Costs
Used to judge a profit centre. The manager controls both revenue and costs.
Return on investment (ROI)
ROI = (Profit ÷ Capital invested) × 100
Main measure for an investment centre. Profit is divided by the capital employed in that division.
Control ladder
Cost centre: costs | Revenue centre: revenue | Profit centre: costs + revenue | Investment centre: costs + revenue + capital
Identify the centre by what the manager controls.
Relationship rule
Every cost centre is a cost object; not every cost object is a cost centre
Products, jobs and customers are cost objects but not responsibility centres.

How to solve Cost Object, Profit Centre and Investment Centre questions

Use this method for any MCQ asking you to identify or distinguish these terms.

  1. 1Read the question and underline what the manager controls or what performance is measured on.
  2. 2If the item is a product, job, service, customer or project and no manager responsibility is mentioned, it is a cost object.
  3. 3If only costs are controlled or collected, choose cost centre.
  4. 4If both revenue and costs are controlled and profit is the measure, choose profit centre.
  5. 5If capital invested is also controlled, or ROI is mentioned, choose investment centre.
  6. 6If only sales or revenue is controlled, choose revenue centre.
  7. 7For numerical questions, compute profit first, then divide by capital for ROI.
  8. 8Eliminate options that mix up the terms, such as a cost centre being judged on ROI.

Quickest way: Keyword scan

When to use it: Use this when a question gives a short description and four options naming different centres.

  1. Look for the trigger word: costs only means cost centre.
  2. Profit or revenue and costs means profit centre.
  3. ROI, capital employed or investment decisions means investment centre.
  4. Product, job or service whose cost is measured means cost object.
  5. Pick the highest level of control mentioned in the question.

Common mistakes in Cost Object, Profit Centre and Investment Centre

  • Treating cost object and cost centre as the same thing.

    Both terms involve collecting costs, so they sound alike.

    Fix: Remember that a cost object is anything whose cost you measure. A cost centre is one kind of cost object that is also a responsibility area.

  • Calling a division a profit centre when its manager also decides on capital investment.

    Students notice profit and stop reading.

    Fix: Check for capital or ROI. If the manager controls investment, it is an investment centre.

  • Judging an investment centre by profit alone.

    Profit is the more familiar measure.

    Fix: Use profit relative to capital invested, that is ROI. Two divisions with the same profit can differ in performance if their capital differs.

  • Calling a canteen or maintenance department a profit centre.

    Students assume every department earns something.

    Fix: If it serves others and does not sell for revenue under its manager's control, it is a cost centre.

  • Forgetting the revenue centre.

    Most notes focus on three centres.

    Fix: Remember that a sales unit judged only on sales is a revenue centre.

  • Dividing profit by revenue instead of capital when calculating ROI.

    This confuses ROI with profit margin.

    Fix: ROI always has capital invested in the denominator.

Worked examples

Example 1

A group has a division that earns revenue, controls its own costs and decides on purchase of new machinery worth ₹40,00,000. Its profit is ₹6,00,000 on capital invested of ₹40,00,000. Identify the type of centre and compute ROI.

Show the solution
  1. The manager controls revenue and costs, so at least a profit centre.
  2. The manager also decides on investment in machinery, so it is an investment centre.
  3. ROI = (Profit ÷ Capital invested) × 100.
  4. ROI = (6,00,000 ÷ 40,00,000) × 100 = 15%.

Answer: Investment centre; ROI = 15%.

Example 2

Which one is a cost object but not a responsibility centre? (A) Stores department (B) Product 'Model X' (C) Sales region manager's territory (D) Maintenance department

Show the solution
  1. A cost object is anything whose cost is measured.
  2. Stores and maintenance departments are cost centres, which are responsibility centres.
  3. The sales territory judged on sales is a revenue centre, which is also a responsibility centre.
  4. Product 'Model X' has cost measured, but no manager is held responsible for it as a centre.

Answer: (B) Product 'Model X'

Exam tips

  • Questions often give a one-line description. Match the level of control to the centre name.
  • Watch for ROI or capital employed. These words almost always point to an investment centre.
  • Do not choose profit centre if capital decisions are mentioned in the stem.
  • Remember that a cost centre is also a cost object. Statements that say the opposite are wrong.
  • If a numerical ROI question appears, the calculation is a single division, so do it quickly and check the options.

Practice questions from Cost, Cost Centre, Cost Unit and Cost Drivers

Cost Object, Profit Centre and Investment Centre in other exams

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

Cost Object, Profit Centre and Investment Centre: frequently asked questions

What is a cost object in cost accounting?

A cost object is anything for which you measure cost. It can be a product, service, job, process, customer, project or department. Cost centres and cost units are specific kinds of cost objects.

What is the difference between a profit centre and an investment centre?

A profit centre manager controls revenue and costs and is judged on profit. An investment centre manager also controls capital invested and is judged on profit relative to that capital, usually through ROI.

Is a cost centre a responsibility centre?

Yes. A cost centre is a responsibility centre where the manager is answerable for costs only. Other types are revenue, profit and investment centres.

How is ROI used for an investment centre?

ROI is profit divided by capital invested, multiplied by 100. It shows how well the division uses the capital given to it, so it allows comparison between divisions of different sizes.