Calculating Departmental Overhead Rates and Applying Overhead to Production: A Comprehensive Guide

In the world of accounting, the efficient allocation of overhead costs is a critical aspect of ensuring accurate financial reporting and cost management within an organization. To achieve this, businesses often use predetermined overhead rates for each department. In this essay, we will walk through the process of calculating these rates and applying overhead costs to production, using a practical example.

Calculating Predetermined Overhead Rates

Predetermined overhead rates are the foundation for allocating overhead costs to specific departments. In the case of Glaser Company, they use departmental overhead rates, with different allocation bases for the assembly and testing departments. The key steps involved in calculating these rates are as follows:

Assembly Department Overhead Rate: To compute the predetermined overhead rate for the assembly department, Glaser Company divides the estimated overhead for this department by the estimated allocation base, which, in this case, is direct labor hours. This yields an overhead rate of approximately $8.68 per direct labor hour.

Testing Department Overhead Rate: For the testing department, the same procedure is followed. Estimated overhead is divided by the estimated allocation base, which is machine hours in this case, resulting in an overhead rate of roughly $10.77 per machine hour.

 Calculating Overhead Applied to Production

Once the predetermined overhead rates are established, they are used to apply overhead costs to production based on the actual usage of the allocation bases during a specific period. In this instance, Glaser Company provided data for the month of March. The calculation of overhead applied to production is as follows:

Assembly Department Overhead Applied: Using the predetermined overhead rate of $8.68 per direct labor hour, and with actual direct labor hours in March of 6,655 hours, Glaser Company applies approximately $57,568.40 to the assembly department.

Testing Department Overhead Applied: With a predetermined overhead rate of $10.77 per machine hour and actual machine hours in March amounting to 12,265 hours, the testing department receives an allocation of roughly $132,100.05.

Determining Overhead Overapplied or Underapplied

The final step in this process is to assess whether each department’s overhead has been overapplied or underapplied during the specified period. To do so, you compare the overhead applied (as calculated in step 2) to the actual overhead incurred in March. The results are as follows:

Assembly Department: With actual overhead costs in March totaling $57,860 and overhead applied of $57,568.40, Glaser Company’s assembly department experienced a slight overapplication of overhead costs by approximately $291.60.

Testing Department: Actual overhead costs for the testing department in March were $65,960, while overhead applied amounted to $132,100.05. This led to an underapplication of overhead costs by roughly $66,140.05.

In conclusion, understanding and effectively managing overhead costs are critical to a company’s financial health and profitability. Calculating predetermined overhead rates and applying them to production is an essential part of this process. By following these steps, businesses like Glaser Company can gain insights into their cost structures and make informed decisions to improve their operations. This not only ensures financial accuracy but also aids in making sound managerial decisions, ultimately leading to more efficient and cost-effective business practices.