A cost unit is a quantitative unit of product or service in relation to which costs are ascertained. The costs incurred during a period are duty collected, analysed and expressed in terms of cost unit. The selection of proper unit is not an easy task because service organizations provide a wide variety of services. It becomes difficult to define the cost unit. The unit may be simple or composite depending upon the nature of service organizations. Below is the list of cost units used by a representative group of service organizations:

Types of Services Organizations/Departments

Cost Unit

1. Good transport (public carriers, trucks, good trains, etc)

per tonne-km or quintal-km

2. Passenger transportation (bus, railway)

per passenger-km

3. Power generation and distribution (electricity boards)

per kilowatt hour

4. Hospitals

per patient-bed day, per operation

5. Hotels

per room per day bed nights, etc.

6. Canteens

per number of staff, per meals served, etc.

7. Water supply

per kilolitres

8. Boiler houses

per kg of steam supplied

9. Road maintenance

per km of road maintained

10. Captive power generation unit

per kilowatt hours

11. Consulting firms

per client hours

12. Computer department

per computer time provided to user departments

13. Machinery maintenance

per maintenance hours spent in user departments