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

Functional Classification of Costs: Production, Administration, Selling and More

Updated 10 October 2026 · Fact-checked

Functional classification groups costs by the business function they serve: production (factory), administration, selling, distribution, and research and development. To solve a question, ask what the cost was incurred for. Factory costs go to production, office running costs to administration, getting orders to selling, and delivering goods to distribution.

Understand Cost Classification by Function

A business does many different jobs. It makes goods, manages itself, wins customers, delivers products and works on new ideas. Functional classification groups costs by which of these jobs they belong to. It answers the question: why was this cost incurred?

The main functional groups are these:

Production (manufacturing) cost: costs of converting raw materials into finished goods. This includes direct material, direct labour, direct expenses and factory overheads such as factory rent, factory power and machine depreciation.
Administration cost: costs of running the organisation as a whole, such as office rent, office salaries, audit fees, legal fees and depreciation of office equipment. These are not tied to making or selling.
Selling cost: costs of creating demand and securing orders, such as advertising, salesmen's salaries and commission, samples and showroom expenses.
Distribution cost: costs from the time the finished goods are ready until they reach the customer, such as warehouse rent for finished goods, packing for despatch, carriage outwards and delivery van expenses.
Research and development (R&D) cost: costs of discovering new products, improving existing products or finding better methods. Examples are lab salaries and testing equipment for a new product.

Selling and distribution are often shown together as selling and distribution overheads, but they are different. Selling is about getting the order. Distribution is about getting the goods to the customer after the order.

In a cost sheet, factory costs build up to factory cost. Administration overheads are added to reach the cost of production. Selling and distribution overheads are then added to reach the cost of sales. Administration overheads are added only once, at the cost of production stage. This is the treatment used at Foundation level.

The same item can fall in different functions depending on where it is used. Rent of a factory building is production cost. Rent of the head office is administration cost. Rent of a finished goods godown is distribution cost. Always look at where and why the cost arises, not just its name.

Key formulas to remember

Prime cost: Prime cost = Direct material + Direct labour + Direct expenses; Part of production cost. Excludes all overheads.
Factory (works) cost: Factory cost = Prime cost + Factory overheads; Adjusted for work-in-progress changes in a full cost sheet.
Cost of production: Cost of production = Factory cost + Administration overheads; As in the standard cost sheet, administration overheads are added at this stage. Do not add them again later.
Cost of goods sold / Cost of sales: Cost of sales = Cost of production (adjusted for finished goods stock) + Selling and distribution overheads; Selling and distribution costs are added after cost of production is complete. Administration is not added again.
Functional split rule: Production = making; Administration = managing; Selling = getting orders; Distribution = delivering; R&D = developing; Use this one-line test to place any cost item.

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 place it in a cost sheet.

1Read the cost item and find out where it is incurred: factory, head office, sales department, warehouse or laboratory.
2Ask what the cost is for: making the product, running the business, getting orders, delivering goods or developing something new.
3Match it to the function: production, administration, selling, distribution or R&D.
4Check for tricky words such as 'factory', 'office', 'outward' and 'showroom', which decide the function.
5Separate carriage inwards from carriage outwards. Inwards is part of material cost. Outwards is distribution.
6If a question asks for a total, add the costs of that function only.
7Check that no item is counted twice and that no item is left out.
8Pick the option that matches your classification. Eliminate options that put a factory cost in selling or an office cost in production.

Quickest way: Four-word keyword test

When to use it: Use this when you have about a minute per MCQ and the question asks which function an item belongs to.

Look for location words. Factory or works means production. Office means administration. Showroom or sales means selling. Godown for finished goods or outward means distribution. Laboratory means R&D.
If there is no location word, ask the purpose: make, manage, sell, deliver or develop.
Remember that advertising and commission are selling, while packing for despatch and delivery van are distribution.
Eliminate options that clearly mismatch and choose the remaining one.

Common mistakes in Cost Classification by Function

Treating selling and distribution as the same thing.
They are usually grouped together as one heading in cost sheets.
Fix: Selling means securing orders, such as advertising and commission. Distribution means moving goods to the customer, such as carriage outwards.
Putting carriage inwards under distribution.
The word 'carriage' suggests transport of goods.
Fix: Carriage inwards is the cost of bringing materials to the factory, so it is part of material cost and production. Only carriage outwards is distribution.
Classifying all rent as administration.
Students link rent with the office.
Fix: Classify rent by the place it is paid for. Factory rent is production, office rent is administration, and finished goods warehouse rent is distribution.
Treating R&D as selling or administration.
R&D looks like a general expense that is not part of making goods.
Fix: R&D is its own function when the question lists it. It covers developing new products or processes, not routine factory work.
Putting advertising in distribution.
Advertising sounds like reaching customers.
Fix: Advertising creates demand, so it is selling. Distribution starts after goods are ready and sold.
Adding selling and distribution costs to production cost, or adding administration overheads twice in a cost sheet.
Students sum every cost to get a total without noting the stage.
Fix: Factory cost plus administration overheads gives cost of production. Selling and distribution overheads are added after that to reach cost of sales. Add administration only once.

Worked examples

Example 1

Classify each cost by function: (a) salary of factory supervisor, (b) audit fees, (c) showroom decoration, (d) carriage outwards, (e) lab testing cost for a new product. Which option is correct? Options: A. Production, Administration, Selling, Distribution, R&D; B. Production, Selling, Selling, Distribution, R&D; C. Administration, Administration, Selling, Production, R&D; D. Production, Administration, Distribution, Selling, Administration.

Show the solution

Factory supervisor salary is incurred in the factory to make goods, so it is production.
Audit fees relate to running the whole company, so it is administration.
Showroom decoration helps attract customers, so it is selling.
Carriage outwards is delivery of goods to customers, so it is distribution.
Lab testing for a new product is development work, so it is R&D.
The sequence Production, Administration, Selling, Distribution, R&D matches option A.

Answer: Option A

Example 2

A company reports these costs for a month: factory rent ₹40,000, office rent ₹25,000, advertising ₹30,000, delivery van expenses ₹15,000, salesmen's commission ₹20,000. Find the total selling cost and the total distribution cost.

Show the solution

Factory rent is production and office rent is administration, so neither belongs in selling or distribution.
Selling costs are advertising ₹30,000 and commission ₹20,000.
Total selling cost = ₹30,000 + ₹20,000 = ₹50,000.
Distribution cost is the delivery van expenses of ₹15,000.
Total selling and distribution overheads together = ₹50,000 + ₹15,000 = ₹65,000.

Answer: Selling cost ₹50,000 and distribution cost ₹15,000

Exam tips

Read the cost item for location words such as factory, office, showroom or outward. They usually decide the answer.
Expect questions that ask you to separate selling from distribution. Learn one example of each.
Watch for carriage inwards versus carriage outwards. Examiners use this as a trap.
In cost sheet totals, add only items of the required function and ignore the rest.
There is no negative marking, so always attempt every question after eliminating clearly wrong options.

Practice questions from Classification of Costs (CAS 1)

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 is functional classification of costs?

It groups costs by the business function they serve. The main groups are production, administration, selling, distribution and research and development. It helps you find the cost of each part of the business.

What is the difference between selling and distribution overheads?

Selling overheads are costs of getting orders, such as advertising and commission. Distribution overheads are costs of delivering goods to customers, such as packing for despatch and carriage outwards. Both are often shown together in a cost sheet.

How is research and development cost classified?

R&D cost is treated as a separate function when the question lists it. It covers costs of developing new products or improving products and processes. Do not mix it with routine production costs.

Is factory rent a production cost or an administration cost?

Factory rent is a production cost because it is incurred for the place where goods are made. Rent of the head office is administration. The function depends on where and why the cost arises.