Fundamentals of Financial and Cost Accounting · Classification of Costs (CAS 1)

Controllable and Non-Controllable Costs Explained

Updated 10 October 2026 · Fact-checked

A controllable cost is one a specific manager can influence or change within a given period. A non-controllable cost is one that manager cannot influence. To solve a question, identify the manager and the time period, then ask: does this manager have the authority to change this cost? If yes, controllable; if no, non-controllable.

Understand Controllable and Non-Controllable Costs

Costs can be grouped by how much a manager can influence them. This classification is based on controllability. It is used to judge a manager fairly and to decide who is answerable for a cost.

A controllable cost is a cost that a particular manager can influence by their own decisions during a given period. A production supervisor can control how much material is wasted, how much overtime is used and how many idle hours occur. These costs can be traced to their decisions.

A non-controllable cost is a cost that the manager cannot influence. Factory rent fixed by the head office, or a share of head office expenses allocated to the factory, is beyond the factory manager's reach. The manager did not decide it and cannot change it.

The key idea: controllability depends on the person and the level of management. A cost that is non-controllable for a supervisor can be controllable for a senior manager. The rent of a factory is not controllable by the shop floor manager, but the board that decides to rent or buy can control it. Also, over a long period almost every cost becomes controllable, because a firm can shift premises or change contracts. So always read the period given in the question.

Controllable and non-controllable is not the same as variable and fixed. Variable costs are often controllable, but a variable cost can be beyond control (for example, a government-fixed price of a raw material). Some fixed costs can be controlled by top management.

Key formulas to remember

Controllable cost test: Controllable = the specified manager can influence the cost in the specified period; Both the manager and the time period must be named. Without them you cannot classify a cost.
Level of management rule: Non-controllable at a lower level may be controllable at a higher level; A cost is non-controllable only for the manager who lacks authority over it.
Responsibility reporting: Manager's performance is judged on controllable costs only; Non-controllable costs are excluded or shown separately when evaluating a manager.

How to solve Controllable and Non-Controllable Costs questions

Use this method for any question that asks you to classify a cost or identify a controllable cost.

1Find the manager or level of management named in the question, such as a department head, supervisor or top management.
2Note the time period given. Costs are more controllable over longer periods.
3Read the cost item and ask who decides its amount.
4Ask if the named manager has authority to change it. If yes, mark it controllable.
5If the cost is decided by a higher authority, allocated from head office, or fixed by outside forces, mark it non-controllable for that manager.
6If the question has no named manager, check whether the cost is the result of a decision by someone at the relevant level.
7Eliminate options that confuse controllability with fixed or variable behaviour.
8Pick the option that matches the manager's authority.

Quickest way: Authority check in ten seconds

When to use it: Use it on MCQs that list several costs and ask which is controllable or non-controllable.

Underline the manager's level in the question.
For each option, ask: can this person change it by their own decision?
Costs like wastage, overtime, idle time, and material usage are usually controllable by a supervisor.
Costs like allocated head office charges, depreciation on assets bought by management and rent fixed by contract are usually non-controllable at lower levels.
Choose the one option that fits; the rest should clearly fail the authority test.

Common mistakes in Controllable and Non-Controllable Costs

Treating all fixed costs as non-controllable and all variable costs as controllable.
Students link controllability to cost behaviour because both appear in the same chapter.
Fix: Judge by authority, not behaviour. Ask who can change the cost. Top management can control some fixed costs.
Ignoring the level of management in the question.
Students memorise a list of examples and apply it to every situation.
Fix: Always identify the manager first. The same cost can change category when the level changes.
Calling a cost non-controllable because it is large.
Big amounts feel unavoidable.
Fix: Size has no link to controllability. A large material cost is controllable if the manager decides usage or purchase.
Forgetting the time period.
Students assume classification is permanent.
Fix: Remember that in the long run most costs become controllable. In a short period, many are not.
Confusing controllable costs with avoidable costs.
Both words suggest the cost can be reduced.
Fix: Controllable relates to a manager's authority. Avoidable relates to whether a cost disappears if an activity stops.
Including allocated head office charges in a manager's performance assessment.
Students assume every cost in the department's account belongs to the manager.
Fix: Judge a manager on controllable costs. Allocated costs the manager cannot influence are non-controllable.

Worked examples

Example 1

A factory has a production supervisor. Which of the following is a controllable cost for the supervisor? (A) Rent of the factory building fixed by the head office (B) Cost of wastage of materials in the shop floor (C) Share of head office expenses allocated to the factory (D) Salary of the managing director

Show the solution

The manager named is the production supervisor, a lower-level manager.
Option A: rent is fixed by the head office, so the supervisor cannot change it.
Option C: allocated head office expenses are decided elsewhere, so they are beyond the supervisor's control.
Option D: the managing director's salary is decided by the board, not the supervisor.
Option B: wastage on the shop floor depends on how the supervisor manages work and supervision, so it is within control.

Answer: (B) Cost of wastage of materials in the shop floor.

Example 2

Rent of a factory building is ₹1,20,000 per year, fixed by a lease signed by the board. The factory manager has no say in it. Which statement is correct? (A) It is controllable for the factory manager (B) It is non-controllable for the factory manager but may be controllable by the board (C) It is controllable by every level of management (D) It is non-controllable for every level of management in all periods

Show the solution

Identify the manager: the factory manager.
The lease was signed by the board, so the factory manager cannot change the rent.
So the rent is non-controllable for the factory manager. Option A fails.
The board decided on the lease and can decide to renew, relocate or buy. So the board can control it.
Options C and D use words like every level and all periods. Controllability depends on level and period, so both are wrong.

Answer: (B) It is non-controllable for the factory manager but may be controllable by the board.

Exam tips

Read the manager's level first. Most MCQs hinge on it.
Look for absolute words such as always, never and all levels. They usually signal a wrong option.
Remember common examples: wastage, overtime and idle time are controllable at shop floor level; allocated head office costs are not.
Do not assume fixed means non-controllable. Check who has authority.
If two options look right, pick the one that matches the lowest level of manager named.

Practice questions from Classification of Costs (CAS 1)

Controllable and Non-Controllable Costs in other exams

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

Controllable and Non-Controllable Costs: frequently asked questions

What is the difference between controllable and non-controllable cost?

A controllable cost can be influenced by a specific manager within a given period. A non-controllable cost cannot be influenced by that manager. The classification depends on the manager's authority, not on the nature of the cost alone.

Can a cost be controllable for one manager and non-controllable for another?

Yes. Controllability depends on the level of management. A cost that a supervisor cannot change, such as factory rent, may be controlled by senior management or the board.

Are all variable costs controllable?

No. Many variable costs are controllable, but a variable cost can be beyond a manager's control, for example when a raw material price is set by the market or by the government. Always check authority, not behaviour.

Give some controllable cost examples.

Common examples at shop floor level are material wastage, overtime payments, idle time and use of supplies. These depend on the decisions of the supervisor or department head.

Why is this classification useful?

It helps fix responsibility and judge managers fairly. A manager is assessed on costs they can influence, so performance reports separate controllable costs from those outside their control.