Tutorial 1 – activity based costing tutorial MACS
After working through this study unit you should be able to:
- Distinguish between traditional costing systems and ABC
- Calculate product overhead costs using ABC
- Make use of unit-based drivers to assign overheads
1.1 Activity-based costing
ABC – is a cost model used to assign manufacturing overheads to different products produced by a manufacturing entity based on the premise that products consume activities, and activities consume resources which incur costs.
ABC assists in reducing product cost distortion by creating a cost pool for activities that can identified as cost drivers and then assigning overheads to products based on the actual number of separate activities they require for completion.
1.2 Traditional vs ABC costing
Total manufacturing costs (product costs) consist of direct costs (direct materials and direct labour) and indirect costs (overheads).
The difference between traditional costing and ABC is how overhead costs are allocated to ach product.
Direct costs are calculated in the same way for both traditional costing systems and ABC.
1.3 Calculating product overhead costs using ABC
Involves 5 steps:
1.Identify the major activities
The first step is to identify the activities that consume resources.
2. Quantify and assign overhead costs to each activity cost centre
Overhead costs are assigned to particular activities on the basis of cause-and-
effect cost drivers.
3. Determine the cost driver and cost driver volume associated with each activity
A cost driver is an activity that causes a cost to be incurred.
4. Determine the cost driver rate (activity cost/cost driver volume)
The cost driver rate is calculated as the activity cost divided by the cost driver
volume.
5. Assign the cost of activities to products according to the product’s demand for activities
By multiplying the cost driver rate by the number of the cost driver units
consumed by product.
1.3 Advantages and limitations of ABC
Advantages of ABC
- Improved cost estimation and product pricing
- Improved understanding of overheads
Disadvantages of ABC
It is time consuming
It may be expensive to buy, implement and maintain an ABC system
1.3 Advantages and limitations of ABC
Advan
🔥 EXAM TIP
Students are encouraged to go through this section to test their understanding of activity – based costing (ABC). It is the foundation for students who are registered with the Institute of Certified Bookkeepers for the Management Accounting Control Systems (MACS) subject. https://www.icb.org.za
📘 Mini Multiple-Choice Check
1. ABC is not suited to a diverse product range consuming resources in different proportions.
A. True
B. False
Correct Answer: False
2.The difference between traditional costing systems and ABC is the way in which:
A Direct costs and overhead costs are calculated
B Only direct costs are calculated
C Only overhead costs are calculated
D Factory costs and selling and administrative costs are calculated
Correct Answer: C – Only overhead costs are calculated
3.Which of the following is a disadvantage of ABC?
A Processes and supply chains are costed
B The determination of a relevant method for assigning certain overheads is time consuming
C The understanding of overheads is enhanced
D Unprofitable product ranges will be identified and eliminated
Correct Answer: B – The determination of a relevant method for assigning certain overheads is time consuming
4. Total fixed costs decrease as production decreases.
A. True
B. False
Correct Answer: False
5. In ABC, the cost driver for receiving components would be:
A Production runs
B Material receipts
C Labour hours
D Production units
Correct Answer: B – Material receipts