Cost classification groups costs by purpose, traceability and behaviour. These are two different questions, so a cost can have one label from each pair.
Cost classification: choose the cost object first
A cost object is the thing whose cost you want to measure: a product, job, service or department. For a printing business, that might be one customer’s brochure order. Without naming the object, “direct cost” is incomplete.
Paper used specifically for that order can be traced to the job. Rent for a shared production building usually cannot be traced exclusively to it. That makes the paper direct and the shared rent indirect relative to the order.
Then ask what happens when activity changes
Suppose each brochure uses the same amount of paper. Within the assumptions of the example, doubling the number of brochures doubles the paper cost. That is variable behaviour.
If monthly rent remains PKR 80,000 whether the business prints 5,000 or 8,000 brochures, it is fixed over that activity range. Fixed does not mean permanent: the rent can change when a lease changes or the business needs another building.
| Cost for a brochure job | Traceability | Behaviour under stated assumptions |
|---|---|---|
| Paper used by the job | Direct | Variable with brochure output |
| Shared factory rent | Indirect | Fixed within existing capacity |
| A one-off design fee solely for this job | Direct | Fixed for that job regardless of copies |
The design fee is the useful counterexample. It is direct because the job causes it, but printing extra copies may not change the fee. Direct does not automatically mean variable.
Why the classification affects decisions
When estimating the cost of producing extra copies, ask which costs will actually change. Dividing fixed rent across units gives a cost per unit, but it does not turn the total rent into a variable cost.
For reporting the cost of a department, some costs that were indirect to individual jobs may be directly traceable to that department. The labels change with the question, not because the cost has become a different transaction.
Practise with an explanation, not a label alone
A supervisor receives a fixed monthly salary and manages several jobs. Relative to one job, the salary is normally indirect. Under the assumption that the salary is unchanged within current capacity, it is fixed. State both the cost object and the activity assumption in your answer.
Keep a two-column revision sheet: “Can I trace it?” and “How does it behave?” Add a sentence explaining every classification. This is more reliable than memorising a list of cost names.
Explore the MA1 Management Information course. For the current scope of your paper, use ACCA’s official MA1 syllabus and study guide.
Build a cost estimate from the classifications
Assume the printing business accepts a job for 2,000 brochures. Paper costs PKR 12 per brochure, ink costs PKR 3 per brochure and a designer charges PKR 6,000 solely for the job. The shared factory rent is PKR 80,000 for the month. Under these assumptions, paper costs PKR 24,000, ink costs PKR 6,000 and the design fee costs PKR 6,000. The total of these directly traced costs is PKR 36,000.
Paper and ink vary with the number printed, giving PKR 15 variable cost per brochure. The design fee is direct to this job but fixed across the job’s output range. Rent is indirect to the job and fixed within the existing facility. If the business reports a full production cost, it may allocate an appropriate share of overhead using a stated method. That allocation does not make the rent traceable in the same way as the paper.
Suppose the customer increases the order to 2,500 brochures and neither the design fee nor capacity changes. Additional paper and ink cost PKR 7,500: 500 brochures multiplied by PKR 15. The direct job cost rises to PKR 43,500. It would be misleading to multiply the original average direct cost of PKR 18 by the extra 500 units, because that average includes a portion of the unchanged design fee.
Recognise mixed and stepped behaviour
A mixed cost contains both a fixed component and a variable component. An electricity bill might include a fixed connection charge plus a usage charge. If the fixed charge is PKR 2,000 and the variable charge is PKR 5 per machine hour, 1,000 machine hours give total cost of PKR 7,000. Increasing usage to 1,500 hours gives PKR 9,500, assuming the same rates.
A stepped fixed cost stays constant within an activity band and then rises when another block of capacity is needed. One supervisor might manage up to a stated number of workers. Hiring a second supervisor increases the salary cost in a step rather than smoothly for each unit produced. Read the thresholds in the question; the cost is not fixed across every possible activity level.
State the time period and activity measure
A monthly salary can be fixed over a short planning period while staffing decisions change it over a longer period. Likewise, a maintenance cost may respond more closely to machine hours than to finished units. Classifying behaviour requires an activity measure and a time horizon. Without them, a confident label can hide an assumption that the question does not support.
For revision, write the driver beside the cost. Materials may vary with units produced, delivery costs with distance or number of deliveries, and certain service costs with hours provided. Avoid assuming that all business costs vary with sales revenue. Production can differ from sales, and a cost can respond to an operational measure rather than the price charged to customers.
Direct labour depends on the arrangement
Workers paid per unit of output may create a variable labour cost. A worker paid a fixed salary can create a cost that remains unchanged over a relevant range. Either worker’s time may be directly traceable to a specific job if records support that attribution. Labour is therefore another example where traceability and behaviour must be considered independently.
If a worker serves several jobs, use reliable time records to identify the portions attributable to each. A supervisor managing the whole production area is usually treated as indirect labour relative to individual products. The same salary may be directly traceable to the production department. Always identify the cost object before deciding whether the amount is direct or indirect.
Classification is not the same as relevance
A variable cost is not automatically relevant to every decision, and a fixed cost is not automatically irrelevant. A dedicated machine rental that would arise only if a new order were accepted can be fixed for the order but still affect the decision. A cost already incurred may not change whichever option is selected. At introductory level, keep this distinction in mind without replacing the classification the question actually requests.
Ask two separate questions: how should the cost be described, and will its amount change between the available choices? Shared rent may be allocated to a product for reporting even when accepting one extra small order does not change the lease payment. Allocation and incremental cash effects serve different purposes.
Check yourself with three short cases
A mould made only for Product A and purchased for a fixed fee is direct to Product A and fixed for the stated output range. Cleaning supplies used across the factory may be indirect to individual products and variable with a suitable activity driver. A department manager’s fixed salary is direct to the department but generally indirect to each product made there.
In each answer, explain the relationship rather than relying on the cost name. If the facts change, the classification may change too. Practise one cost under two different cost objects and one cost under two different payment arrangements. This is a stronger test of understanding than repeating definitions in isolation.
Frequently asked questions
Are all direct costs variable?
No. Direct or indirect describes traceability to a cost object. Fixed or variable describes behaviour as activity changes. They are different classifications.
Can a cost be direct for one purpose and indirect for another?
Yes. Traceability depends on the cost object, such as a job, product or department. State what you are measuring before classifying it.