Plantwide Overhead Rate and Its Role in Product Costing

by Kurt Johnson

Kline Company expects to incur $800,000 inoverhead costs this coming year—$200,000 in the Cut and Polishdepartment and $600,000 in the Quality Control department. The Cut andPolish department expects to use 25,000 machine hours, and theQuality Control department plans to utilize 50,000 hours of directlabor time for the year. You also need the total number of direct labor hours and the direct labor hours required to produce each product the plant manufactures.

When there is a big difference between the actual and estimated overheads, unexpected expenses will definitely be incurred. Also, profits will be affected when sales and production decisions are based on an inaccurate overhead rate. One of the advantages of predetermined overhead rate is that businesses can use it to help with closing their books more quickly. This is because using this rate allows them to avoid compiling actual overhead costs as part of their closing process. Nonetheless, it is still essential for businesses to reconcile the difference between the actual overhead and the the ultimate guide to crowdfunding for nonprofits estimated overhead at the end of their fiscal year.

Let’s say we consider our operation to be labor-intensive rather than capital-intensive (automated). In that case, we might choose to allocate fixed overhead based how to deduct personal appearance expenses on direct labor hours (DLH) or direct labor dollars (DL$). If our standard direct labor cost is the same for both purses, these two calculations will produce the same results, so in this lesson, we’ll use DL$.

Monitoring relative expenses

The company, having calculated its overhead costs as $20 per labor hour, now has a baseline cost-per-hour figure that it can use to appropriately charge its customers for labor and earn a profit. That is, the company is now aware that a 5-hour job, for instance, will have an estimated overhead cost of $100. Applying our formula, we get $188,000 in fixed overhead divided by the base of 47,000 total direct machine hours for an allocation rate of $4 per machine hour. The plantwide overhead rate is important because it helps companies determine the cost of production for each unit or service.

  • Based on its plantwide overhead rate, Nimble’s controller assigns $640,000 of the total factory overhead to this product (calculated as 8,000 hours x $80 plantwide rate).
  • So, for every hour of direct labor used to produce widgets and gizmos, XYZ Inc. will allocate $50 of manufacturing overhead costs.
  • Allocation bases (such as direct labor, direct materials, machine hours, etc.) are used when finding a relationship with total overhead costs.
  • Remember that product costs consist of direct materials, direct labor, and manufacturing overhead.
  • By dividing the total overhead costs by the total direct labor hours, the Plantwide Overhead Rate can be calculated as $30 per direct labor hour.
  • That is, if the predetermined overhead rate turns out to be inaccurate and the sales and production decisions are made based on this rate, then the decisions will be faulty.

Allocating Based on Direct Labor

This is crucial for competitive pricing and ensuring the company’s profitability, particularly in industries with homogenous products. By following these clear and precise steps and understanding the necessary components, businesses can effectively calculate the plantwide overhead rate, facilitating better financial management and operational efficiency. Using the predetermined overhead rate formula and calculation provides businesses with a percentage they can monitor on a in a process costing system the number of wip inventories quarterly, monthly, or even weekly basis. Businesses monitor relative expenses by having an idea of the amount of base and expense that is being proportionate to each other.

  • The controller assigns $160,000 of factory overhead to this product (calculated as 2,000 hours x $80 plantwide rate).
  • The predetermined overhead rate is calculated by dividing the estimated manufacturing overhead by the estimated activity base (direct labor hours, direct labor dollars, or machine hours).
  • While Plantwide Overhead Rate simplifies allocation, it may lead to inaccurate distribution of indirect costs, challenges in establishing the correct overhead allocation rate, and limitations in detailed costing analysis.
  • According to a survey 34% of the manufacturing businesses use a single plant wide overhead rate, 44% use multiple overhead rates and rest of the companies use activity based costing (ABC) system.
  • Organizations that use this approach tend tohave simple operations within each department but differentactivities across departments.

Accuracy Improvement in Cost Information

The overhead rate of cutting department is based on machine hours and that of finishing department on direct labor cost. As the name implies, these overhead rates take into account the entire plant and not a particular segment or department. The plantwide overhead rate might not help obtain exact figures, but the estimates are efficient enough for better planning.

How to calculate the predetermined overhead rate: Example 3

The overhead cost per unit from Figure 6.4 is combined with the direct material and direct labor costs as shown in Figure 6.3 to compute the total cost per unit as shown in Figure 6.5. In these situations, a direct cost (labor) has been replaced by an overhead cost (e.g., depreciation on equipment). Because of this decrease in reliance on labor and/or changes in the types of production complexity and methods, the traditional method of overhead allocation becomes less effective in certain production environments. Nimble Corporation uses 10,000 direct labor hours in its main production facility in a typical month. Since the factory has a relatively simple production process, the controller decides to implement a plantwide overhead rate that is allocated based on the number of direct labor hours.

Technology in Overhead Calculation

These systems can track and allocate costs with greater accuracy by using real-time data from various departments within a company. For instance, an ERP system can automatically assign overhead costs to products as they move through the production process, based on the actual resources consumed. To begin with, a company must ascertain the total overhead costs incurred during a specific period.

Applying Manufacturing Overhead Using a Plantwide Overhead Rate

Different industry sectors have varying levels of overhead costs due to their unique production methods and resource utilization. For example, heavy manufacturing industries may have higher overhead rates compared to service-oriented sectors, where labor costs play a more significant role. As shown in Figure 3.3, products going through the HullFabrication department are charged $50 in overhead costs for eachmachine hour used.

The department allocation approach allows cost pools to beformed for each department and provides for flexibility in theselection of an allocation base. Although Figure 3.3 shows just tworates, many companies have more than two departments and thereforemore than two rates. Organizations that use this approach tend tohave simple operations within each department but differentactivities across departments. One department may use machinery,while another department may use labor, as is the case withSailRite’s two departments. Thisassumption of a causal relationship is increasingly less realisticas production processes become more complex.

Product A requires 1.5 hours per unit, so the overhead rate is 1.5 times $48, or $72 per unit. For product B, two labor hours are needed per unit, so the overhead per unit equals two times $48, or $96. Explore the significance of plantwide overhead rate in product costing and how it streamlines financial processes across various industries. One of the advantages of predetermined overhead rate is that it can help businesses monitor overhead rate. A business can calculate its actual costs periodically and then compare that to the predetermined overhead rate in order to monitor expenses throughout the year or see how on-target their original estimate was. This comparison can be used to monitor or predict expenses for the next project (or fiscal year).