Management Accounting · Cost classification

Cost Classification by Element: Direct and Indirect Costs

Updated 11 October 2026 · Fact-checked

Cost classification by element splits costs into materials, labour and expenses. Each element is then split into direct (traceable to a cost unit) and indirect (not traceable, called overhead). Direct costs added together give prime cost. Prime cost plus production overheads gives production cost. Adding non-production overheads gives total cost.

Understand Cost Classification by Element

Every cost a business incurs belongs to one of three elements: materials, labour or expenses. Materials are goods used up, such as wood or fabric. Labour is the pay of people. Expenses are everything else, such as rent, power or insurance.

Next, you split each element by whether you can trace it to a cost unit. A cost unit is the thing you are costing, such as one product, one job or one service. A direct cost can be traced to a cost unit in an economic way. An indirect cost cannot. Indirect costs are called overheads.

So you get six boxes: direct materials, direct labour, direct expenses, indirect materials, indirect labour and indirect expenses. For a chair maker, wood in the chair is direct material. Glue used in tiny amounts across all chairs is usually indirect material. The pay of the carpenter who builds the chair is direct labour. The pay of the factory supervisor is indirect labour. A fee paid to hire a special machine for one job is a direct expense. Factory rent is an indirect expense.

Direct costs are added up to give prime cost. Indirect costs are collected as overheads. Overheads are later absorbed into cost units. The result is the full cost of each unit.

The same item can be direct or indirect depending on the cost unit. Factory rent is indirect for a product. But it may be direct if the cost unit is the factory itself. Always ask: direct to what?

Key formulas to remember

Prime cost: Prime cost = direct materials + direct labour + direct expenses; Only direct costs. Overheads are never in prime cost.
Total production cost: Production cost = prime cost + production overheads; Production overheads include indirect materials, indirect labour and indirect expenses of the factory.
Total cost: Total cost = production cost + administration, selling and distribution overheads; Also called full cost or total cost of sales when other overheads are included.
Overheads: Overheads = indirect materials + indirect labour + indirect expenses; Overheads can be split by function: production, administration, selling and distribution.
Selling price from cost plus: Selling price = total cost + profit; If profit is a margin on sales, divide total cost by (1 − margin %). If it is a mark-up on cost, multiply total cost by (1 + mark-up %).

How to solve Cost Classification by Element questions

Use this method for any question that asks you to classify costs or build up prime cost and total cost.

1Identify the cost unit. Direct and indirect only make sense for a stated product, job or service.
2Put each cost into an element: materials, labour or expenses.
3Ask if the cost can be traced to the cost unit in an economic way. If yes, it is direct. If no, it is indirect.
4Add the direct materials, direct labour and direct expenses to get prime cost.
5Add the production overheads to prime cost to get production cost.
6Add administration, selling and distribution overheads to get total cost.
7If asked for a unit figure, divide by units. If asked for a price, add the profit last.
8Check that every cost appears once and only once.

Quickest way: Direct or indirect in five seconds

When to use it: Use this on multiple choice questions that ask you to pick the direct or indirect cost, or to calculate prime cost from a list.

Picture one unit of the product. Would that cost appear if you made one more unit? If yes, it is likely direct.
Cross out any item that is rent, supervision, depreciation, cleaning or general power. These are usually indirect.
Add only the remaining items for prime cost.
Read the question wording for traps such as selling costs, which are never in prime cost.

Common mistakes in Cost Classification by Element

Putting all labour into direct labour.
Students think any wages are a product cost that can be traced.
Fix: Only labour that works directly on the product is direct. Supervisors, cleaners and maintenance staff are indirect labour.
Including factory overheads in prime cost.
Prime cost sounds like the main cost of production.
Fix: Prime cost is direct costs only. Add production overheads afterwards to reach production cost.
Treating direct expenses as non-existent.
Students remember only direct materials and direct labour.
Fix: Include direct expenses such as subcontractor fees or special equipment hire for one job in prime cost.
Treating small material items as direct.
Students see that the item physically goes into the product.
Fix: If the cost is too small to trace economically, such as nails or thread, it is treated as indirect material.
Mixing up element and function.
Both are ways of classifying cost and the words sound alike.
Fix: Element means materials, labour or expenses. Function means production, administration or selling and distribution. A cost has both labels.
Forgetting that direct or indirect depends on the cost unit.
Students memorise fixed lists of examples.
Fix: Always read what the cost unit is. A supervisor of one department is direct to that department but indirect to each product.

Worked examples

Example 1

A company makes 2,000 units. Costs for the period: direct materials $18,000; indirect materials $1,500; direct labour $24,000; indirect labour $6,000; factory rent $4,000; direct expenses (royalty) $2,000; administration costs $9,000. Calculate prime cost and production cost.

Show the solution

Prime cost = direct materials + direct labour + direct expenses.
Prime cost = $18,000 + $24,000 + $2,000 = $44,000.
Production overheads = indirect materials + indirect labour + factory rent.
Production overheads = $1,500 + $6,000 + $4,000 = $11,500.
Production cost = $44,000 + $11,500 = $55,500.
Administration costs of $9,000 are not production costs, so they are excluded.

Answer: Prime cost is $44,000 and production cost is $55,500.

Example 2

Using the data from the previous example, selling and distribution costs were $5,000. The company sets its selling price at total cost plus a 25% mark-up on cost. Calculate the total cost and the selling price per unit.

Show the solution

Total cost = production cost + administration + selling and distribution.
Total cost = $55,500 + $9,000 + $5,000 = $69,500.
Mark-up of 25% on cost: selling price total = $69,500 × 1.25 = $86,875.
Price per unit = $86,875 ÷ 2,000 = $43.4375.

Answer: Total cost is $69,500 and the selling price is about $43.44 per unit.

Exam tips

In multiple choice questions, check the cost unit first. The same cost can be direct or indirect.
For number entry questions on prime cost, list only direct items and add them. Leave out everything else.
In multiple response questions, select exactly the stated number of options. Do not add extras.
Watch for words like depreciation, supervisor, rent and insurance. These usually signal indirect costs.
Read the last line of the question. It may ask for prime cost, production cost or total cost, and each needs a different stop point.

Practice questions from Cost classification

Cost Classification by Element in other exams

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

Cost Classification by Element: frequently asked questions

What is the difference between direct and indirect costs?

A direct cost can be traced to a cost unit in an economic way, such as the wood in a chair. An indirect cost cannot, such as factory rent. Indirect costs are called overheads.

How do you calculate prime cost?

Add direct materials, direct labour and direct expenses. Do not include any overheads. Prime cost is the total of all direct costs.

Is depreciation a direct or indirect cost?

Depreciation of general factory machinery is normally an indirect expense. It is only direct if the asset is used solely for one cost unit, such as one specific job.

What is the difference between cost element and cost function?

Element splits cost by what it is: materials, labour or expenses. Function splits cost by what it is for: production, administration, or selling and distribution.