Management Accounting · Cost classification

Cost Classification by Function in Management Accounting

Updated 11 October 2026 · Fact-checked

Cost classification by function groups costs by the business activity that causes them: production, administration, selling and distribution, or finance. To solve a question, ask what the cost is for. Production costs go into product cost and inventory. The other functional costs are period costs, charged to profit in the period.

Understand Cost Classification by Function

A business does different jobs. It makes goods, runs the office, sells and delivers, and arranges funding. Cost classification by function puts each cost under the job it supports. This lets managers see what each part of the business costs and control it.

The main functions are:

Production (manufacturing) costs: costs of making the product, such as factory materials, factory wages, factory rent, and factory machine depreciation.
Administration costs: costs of running the organisation overall, such as office salaries, head office rent, and audit fees.
Selling and distribution costs: selling costs include sales staff pay and advertising. Distribution costs include delivery vehicle running costs and warehouse costs for finished goods.
Finance costs: costs of raising and servicing funds, such as loan interest and bank charges.

The function matters for costing because of how costs are treated. Production costs are attached to units made. Under absorption costing they form the cost of inventory, and they only reach the income statement as cost of sales when the units are sold. Administration, selling and distribution, and finance costs are usually treated as period costs. They are charged against profit in the period they occur and are not included in inventory value.

The label depends on purpose, not on the type of item. Rent is not always production cost. Factory rent is production, but head office rent is administration and showroom rent is selling. Always ask where the cost is incurred and why.

Key formulas to remember

Total production cost: Direct materials + Direct labour + Direct expenses + Production overheads; Direct costs plus factory overheads. Excludes administration, selling, distribution and finance costs.
Total cost of sales (full cost): Production cost + Administration + Selling and distribution (+ Finance if included); Used when a question asks for the full cost of a product. Read the wording to see which functions to include.
Inventory valuation rule: Inventory cost = production costs only (absorption costing); Non-production costs are period costs and are not put into inventory.

How to solve Cost Classification by Function questions

Use this method for any question that asks you to classify a cost by function or to build a total from functional costs.

1Read the cost description and find where in the business it arises: factory, office, sales or delivery, or funding.
2Ask what the cost is for, not what it is called. Rent, depreciation and salaries can sit in any function.
3Assign it: factory means production; general running means administration; getting goods sold or to the customer means selling and distribution; funding means finance.
4Check the question's purpose. For product cost or inventory value, keep production costs only.
5If asked for a total, add only the functions the question requires, and exclude finance costs unless told otherwise.
6Check your arithmetic and that no item is counted twice or left out.

Quickest way: Factory or not factory

When to use it: Use in multiple choice or multiple response questions where you must pick the correct classification quickly.

Ask: is the cost incurred in making the product? If yes, it is production.
If not, ask: does it help sell or deliver finished goods? If yes, it is selling and distribution.
If it is about interest or raising funds, it is finance.
Anything else general to running the business is administration.
Watch for words like factory, office, showroom, delivery and head office. They decide the answer.

Common mistakes in Cost Classification by Function

Classifying all rent or depreciation as production cost.
Students link these items with the factory by habit.
Fix: Check where the asset is used. Factory building is production, head office is administration, showroom is selling.
Including selling and administration costs in inventory valuation.
Students confuse total cost with product cost.
Fix: Under absorption costing, only production costs go into inventory. The rest are period costs.
Treating distribution costs as production costs because they relate to the product.
The costs feel connected to the goods.
Fix: Production ends when goods are finished. Delivering them to customers is distribution.
Putting warehouse costs for finished goods under administration.
Warehouses feel like general support.
Fix: Finished goods warehousing is normally a distribution cost. Raw materials storage in the factory is production.
Adding finance costs into the cost of a product.
Interest looks like a cost of doing business.
Fix: Finance costs are normally excluded from product cost. Include them only if the question says to.

Worked examples

Example 1

A manufacturer incurs these costs in a month: direct materials $40,000; direct labour $25,000; factory rent $8,000; factory supervisor salary $6,000; head office salaries $15,000; sales staff commission $9,000; delivery van costs $4,000; loan interest $3,000. Calculate the total production cost.

Show the solution

Identify production items: direct materials $40,000, direct labour $25,000, factory rent $8,000, factory supervisor $6,000.
Exclude head office salaries (administration), commission and van costs (selling and distribution), and loan interest (finance).
Add: 40,000 + 25,000 + 8,000 + 6,000 = 79,000.

Answer: Total production cost is $79,000.

Example 2

Using the costs in the previous question, calculate the total cost of sales including production, administration, and selling and distribution costs, but excluding finance costs.

Show the solution

Production cost from before: $79,000.
Administration: head office salaries $15,000.
Selling and distribution: commission $9,000 + van costs $4,000 = $13,000.
Total: 79,000 + 15,000 + 13,000 = 107,000.
Loan interest of $3,000 is left out as a finance cost.

Answer: Total cost of sales is $107,000.

Exam tips

Look for location words such as factory, office, showroom and delivery. They usually give the function.
In inventory valuation questions, strip out every non-production cost before you add.
Read whether finance costs are in or out of the total. Most questions leave them out.
In multiple response questions, check every option separately. One wrong choice can lose the marks.
Do not rely on cost names. Decide by where and why the cost arises.

Practice questions from Cost classification

Cost Classification by Function 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 Function: frequently asked questions

What are the main functional cost classifications?

They are production, administration, selling and distribution, and finance. Each groups costs by the business activity they support. Some textbooks also show research and development as a separate function.

Are administration costs part of product cost?

Not under absorption costing. Product cost and inventory value include production costs only. Administration costs are period costs charged to profit in the period.

Is distribution the same as selling cost?

No, they are different but usually grouped together. Selling costs are about getting orders, such as advertising and sales pay. Distribution costs are about delivering goods to customers.

Can the same type of cost fall into different functions?

Yes. Rent, depreciation and salaries can be production, administration or selling costs. The function depends on where the cost is incurred.