Why are direct labor hours and machine hours commonly used as the bases for overhead allocation?
Christopher Davis
Updated on February 07, 2026
The more direct labor hours worked, the higher the overhead costs incurred. Thus direct labor hours or direct labor costs would be used as the allocation base. If a company’s production process is highly mechanized (i.e., it relies on machinery more than on labor), overhead costs are likely driven by machine hours.
How do you calculate allocation activity cost?
An activity-based costing rate is calculated by assigning indirect costs to a cost pool, adding the costs included in that cost pool together, then dividing the cost pool total by the cost driver.
How do you calculate unit cost using Activity Based Costing?
Identify all the activities required to create the product. Divide the activities into cost pools, which includes all the individual costs related to an activity—such as manufacturing. Calculate the total overhead of each cost pool. Assign each cost pool activity cost drivers, such as hours or units.
What is the rule for selecting an allocation base for company expenses?
The allocation base should be a cause, or driver, of the cost being allocated. A good indicator that an allocation base is appropriate is when changes in the allocation base roughly correspond to changes in the actual cost. Thus, if machine usage declines, so too should the actual cost incurred to operate the machine.
How are machine hours charged in overhead allocation?
Work that required 120 machine hours would be charged with $120 (120 hours X $l)for factory overhead. This method of Overhead Allocation requires additional clerical work. Shop men, foremen, or timekeepers will have to collect machine hour data needed to charge overhead to jobs or products.
How to calculate the allocation base of a warehouse?
Rent of the warehouse is $10,000 monthly. Now the allocation base of the warehouse is $10,000. If 100 cars are produced in a month, then each car will share an overhead rent cost of = Number of Cars / Monthly Rent. Car will Share an Overhead Rent Cost = 10,000 / 100 = $100
How are overhead costs allocated to a product?
Overhead costs are allocated to products by multiplying the predetermined overhead rate for each activity (calculated in step 4) by the level of cost driver activity used by the product. The term applied overhead is often used to describe this process.
How to allocate costs in a service department?
To allocate the service department costs to each operating department, we will take the amount of the cost driver (machine hours for maintenance and employees for administration) x the allocation rate we just calculated.