Cost and Management Accounting · Service Costing

Introduction to Service Costing for CA Intermediate

Updated 4 October 2026 · Fact-checked

Service costing is the method of ascertaining the cost of services rendered, not goods made. Services are intangible and cannot be stored, so cost is found per service cost unit, such as per passenger-km or per bed-day. Solve it by listing costs, classifying them, choosing the unit and dividing.

Understand Introduction to Service Costing

Service costing (also known as operating costing in some textbooks) is used by organisations that provide services instead of producing physical goods. Examples are transport, hospitals, hotels, power supply, education, banks and telecom. The aim is to find the cost of one unit of service and to control cost.

Services differ from goods in a few ways. They are intangible, so there is nothing to hold in stock. They are produced and consumed at the same time, so there is no inventory of finished services and usually no work-in-progress. Output often varies from one customer to the next. Because of this, material cost is small or absent in many services, and most cost is labour and overheads, often fixed.

The key step is choosing the cost unit. It must measure the service fairly. A bus service uses a composite unit like passenger-km, which combines two measures (passengers and distance). A hospital uses patient-day or bed-day. A hotel uses room-day. A single unit such as km alone would hide how many people were carried.

Difference from product costing: product costing deals with tangible output, builds up cost through material, labour and overheads, and values stock of WIP and finished goods. Service costing deals with intangible output, has no stock to value, and often classifies cost by nature into fixed (or standing), semi-variable (or maintenance) and variable (or running) charges.

Service costing may be applied by service-providing businesses and also by service departments inside a factory, such as a canteen, boiler house, power house or internal transport. In these cases the cost of the service per unit helps in control and in charging other departments.

Key rules to remember

Cost per unit of service: Cost per service unit = Total cost of the service ÷ Number of service units; Use the total cost for the same period and the same service as the units.
Composite cost unit: Composite unit = Measure 1 × Measure 2 (e.g. passenger-km = passengers × km); Used where one measure alone is not fair, such as transport and hospitals (patient-days).
Absolute (weighted) units: Absolute passenger-km = Σ (passengers carried × distance for each trip); Use when passengers or loads differ across trips. Commercial units use average load times distance.
Classification of service costs: Total cost = Fixed (standing) charges + Semi-variable (maintenance) charges + Variable (running) charges; Helps to control cost and to see which costs change with activity.
Cost-unit examples: Transport: passenger-km, tonne-km | Hospital: patient-day, bed-day | Hotel: room-day | Power: kWh | Canteen: meal; Pick the unit that fits the service and that ICAI usually names in the question.

How to solve Introduction to Service Costing questions

Use this method for any theory or numerical question on the introduction to service costing.

1Identify the service and confirm it is intangible, with no stock of finished output.
2State the right cost unit. If one measure is not enough, use a composite unit.
3List all costs for the period and classify them as fixed, semi-variable or variable (or as per the format given).
4Allocate shared or common costs on a sensible basis, if the question gives data for it.
5Total the cost for the period and compute the number of service units, using the correct formula for units.
6Divide total cost by units to get cost per unit. Add profit margin only if the question asks for a charge or fare.
7For theory, answer in a fixed structure: meaning, features, application, then the difference from product costing, with one example each.

Quickest way: Features, then unit, then divide

When to use it: Use this in the exam hall for MCQs and for short written answers on service costing.

MCQ: look at the service and match the cost unit. Bus is passenger-km, hospital is patient-day, hotel is room-day, power is kWh.
MCQ: if an option says a service has closing stock or WIP valuation, reject it as a rule. Services have no inventory.
MCQ: if the option says a composite unit, check whether two measures are multiplied.
Written: write three headings, Meaning, Features, Difference from product costing. Use bullet points, one line each, so each point earns a mark.
Numerical: write cost heads in a neat statement, total them, write the unit calculation as a separate line, then divide. Show each line for step marks.

Common mistakes in Introduction to Service Costing

Showing closing stock or WIP of a service in the answer.
Students carry over product costing habits.
Fix: Remember that services are consumed as they are produced. Show no stock adjustment.
Using only km or only passengers as the cost unit for transport.
Students pick the easiest figure in the question.
Fix: Use a composite unit such as passenger-km. Compute it as passengers × distance.
Treating service costing as having no material cost at all.
Students overstate that services have no materials.
Fix: Say that material is usually small or absent. A hospital or hotel still uses consumables, which are costed.
Mixing up operating costing (service costing) with operation costing, or with process costing, in the difference answer.
The names operating costing and operation costing sound alike, though they mean different things.
Fix: Remember that operating costing is another name for service costing used in some textbooks. Operation costing is a separate production method for repetitive operations, and process costing is a different production method again. Use the heading Service Costing in your answer.
Dividing total cost by the wrong number of units, such as seats instead of seats actually used.
Students skip the line that finds the units.
Fix: Write the unit calculation as its own line first and check it against the cost unit named.
Listing only features and forgetting applications or examples.
Students memorise a features list only.
Fix: Add at least one example for each point, such as transport, hospital, hotel or canteen.

Worked examples

Example 1

State the features of service costing and distinguish it from product costing in four points.

Show the solution

Features: the output is intangible and cannot be stored, so there is no inventory or WIP.
Features: production and consumption happen together, so cost is computed for a period.
Features: a suitable composite cost unit is chosen, such as passenger-km or patient-day.
Features: most cost is fixed or labour-related, and costs are classified as fixed, semi-variable and variable.
Difference 1: product costing deals with tangible goods; service costing deals with intangible services.
Difference 2: product costing values stock of WIP and finished goods; service costing has no such stock.
Difference 3: product costing has material as a major element; service costing has little or no material cost.
Difference 4: product cost units are physical units such as kg or pieces; service cost units are often composite units such as passenger-km.

Answer: Service costing finds cost per unit of an intangible, non-storable service. It differs from product costing in nature of output, stock valuation, material content and type of cost unit.

Example 2

A bus runs on one route and carries 30 passengers for 20 km, then 40 passengers for 10 km, and 20 passengers for 25 km. Total cost for these trips is ₹6,600. Find the absolute passenger-km and the cost per passenger-km.

Show the solution

Trip 1 passenger-km = 30 × 20 = 600.
Trip 2 passenger-km = 40 × 10 = 400.
Trip 3 passenger-km = 20 × 25 = 500.
Total absolute passenger-km = 600 + 400 + 500 = 1,500.
Cost per passenger-km = ₹6,600 ÷ 1,500 = ₹4.40.

Answer: Total passenger-km is 1,500 and the cost per passenger-km is ₹4.40.

Exam tips

Learn the standard cost unit for each service. MCQs often ask you to match service to unit.
Define it as service costing. You may add that it is also known as operating costing in some textbooks, but do not confuse it with operation costing.
In a difference question, give four to five points with one-line contrasts. Avoid long paragraphs.
In numericals, show the unit calculation as a separate line. Marks are often given for it.
There is no negative marking, so attempt every MCQ. Eliminate any option that mentions stock of services.

Practice questions from Service Costing

Introduction to Service Costing in other exams

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

Introduction to Service Costing: frequently asked questions

What is service costing in simple words?

It is the method of finding the cost of providing a service, such as a bus ride or a hospital bed-day. You add up the costs of the service and divide by the service units. Some textbooks also call it operating costing.

What are the main features of service costing?

Output is intangible and cannot be stored, so there is no inventory. Cost is found for a period using a suitable cost unit, often a composite unit. Fixed costs usually form a large part of total cost.

What is the difference between service costing and product costing?

Product costing is for tangible goods and values WIP and finished stock. Service costing is for intangible services with no stock, little material cost and cost units like passenger-km or room-day.

Where is service costing applied?

It is used in transport, hospitals, hotels, education, power supply, banks and telecom. It is also used for internal services in a factory, such as a canteen or power house.