What Is Activity-Based Costing (ABC)?

Activity-based costing (ABC) is a costing method that assigns overhead and indirect costs to related products and services. This accounting method of costing recognizes the relationship between costs, overhead activities, and manufactured products, assigning indirect costs to products less arbitrarily than traditional costing methods. However, some indirect costs, such as management and office staff salaries, are difficult to assign to a product.

How Activity-Based Costing (ABC) Works

Activity-based costing (ABC) is mostly used in the manufacturing industry since it enhances the reliability of cost data, hence producing nearly true costs and better classifying the costs incurred by the company during its production process.

This costing system is used in target costing, product costing, product line profitability analysis, customer profitability analysis, and service pricing. Activity-based costing is used to get a better grasp on costs, allowing companies to form a more appropriate pricing strategy. 

The formula for activity-based costing is the cost pool total divided by cost driver, which yields the cost driver rate. The cost driver rate is used in activity-based costing to calculate the amount of overhead and indirect costs related to a particular activity. 

The ABC calculation is as follows:  

1. Identify all the activities required to create the product. 
2. 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.
3. Assign each cost pool activity cost drivers, such as hours or units. 
4. Calculate the cost driver rate by dividing the total overhead in each cost pool by the total cost drivers. 
5. Divide the total overhead of each cost pool by the total cost drivers to get the cost driver rate. 
6. Multiply the cost driver rate by the number of cost drivers. 

As an activity-based costing example, consider Company ABC that has a $50,000 per year electricity bill. The number of labor hours has a direct impact on the electric bill. For the year, there were 2,500 labor hours worked, which in this example is the cost driver. Calculating the cost driver rate is done by dividing the $50,000 a year electric bill by the 2,500 hours, yielding a cost driver rate of $20. For Product XYZ, the company uses electricity for 10 hours. The overhead costs for the product are $200, or $20 times 10.

Requirements for Activity-Based Costing (ABC)

The ABC system of cost accounting is based on activities, which are any events, units of work, or tasks with a specific goal, such as setting up machines for production, designing products, distributing finished goods, or operating machines. Activities consume overhead resources and are considered cost objects.

Under the ABC system, an activity can also be considered as any transaction or event that is a cost driver. A cost driver, also known as an activity driver, is used to refer to an allocation base. Examples of cost drivers include machine setups, maintenance requests, consumed power, purchase orders, quality inspections, or production orders.

There are two categories of activity measures: transaction drivers, which involves counting how many times an activity occurs, and duration drivers, which measure how long an activity takes to complete.

Unlike traditional cost measurement systems that depend on volume count, such as machine hours and/or direct labor hours to allocate indirect or overhead costs to products, the ABC system classifies five broad levels of activity that are, to a certain extent, unrelated to how many units are produced. These levels include batch-level activity, unit-level activity, customer-level activity, organization-sustaining activity, and product-level activity.

Benefits of Activity-Based Costing (ABC)

Activity-based costing (ABC) enhances the costing process in three ways. First, it expands the number of cost pools that can be used to assemble overhead costs. Instead of accumulating all costs in one company-wide pool, it pools costs by activity. 

Second, it creates new bases for assigning overhead costs to items such that costs are allocated based on the activities that generate costs instead of on volume measures, such as machine hours or direct labor costs. 

Finally, ABC alters the nature of several indirect costs, making costs previously considered indirect—such as depreciation, utilities, or salaries—traceable to certain activities. Alternatively, ABC transfers overhead costs from high-volume products to low-volume products, raising the unit cost of low-volume products.

What Is Activity-Based Management?

Activity-based management (ABM) is a system for determining the profitability of every aspect of a business so that its strengths can be enhanced and its weaknesses can either be improved or eliminated altogether.

Activity-based management (ABM), which was first developed in the 1980s, seeks to highlight the areas where a business is losing money so that those activities can be eliminated or improved to increase profitability. ABM analyzes the costs of employees, equipment, facilities, distribution, overhead, and other factors in business to determine and allocate activity costs.

Understanding Activity-Based Management (ABM)

Activity-based management can be applied to different types of companies, including manufacturers, service providers, non-profits, schools, and government agencies. ABM can provide cost information about any area of operations in a business.

In addition to improving profitability and the overall financial strength of a company, the results of an ABM analysis can help that company produce more accurate budgets and long-term financial forecasts.

Examples of Activity-Based Management (ABM)

ABM can be used, for example, to analyze the profitability of a new product a company is offering, by looking at marketing and production costs, sales, warranty claims, and any costs or repair time needed for returned or exchanged products. If a company is reliant on a research and development department, ABM can be used to look at the costs of operating the department, the costs of testing out new products and whether the products developed there turned out to be profitable.

Another example might be a company that has opened an office in a second location. ABM can help management assess the costs of the running that location, including the staff, facilities, and overhead, and then determine whether any subsequent profits are enough to make up for or justify those costs.

Special Considerations

A lot of the information gathered in activity-based management is derived from information gathered from another management tool, activity-based costing (ABC). Whereas activity-based management focuses on business processes and managerial activities driving organizational business goals, activity-based costing seeks to identify and reduce cost drivers by optimizing resources.

Both ABC and ABM are management tools that help in managing operational activities to improve the performance of a business entity or an entire organization.

Activity-based costing can be considered an offshoot of activity-based management. By mapping business costs like supplies, salaries, and leasing activity to business processes, products, customers, and distribution activity, activity-based costing helps improve overall managerial effectiveness and transparency.

What is Activity-Based Budgeting (ABB)?

Activity-based budgeting (ABB) is a system that records, researches, and analyzes activities that lead to costs for a company. Every activity in an organization that incurs a cost is scrutinized for potential ways to create efficiencies. Budgets are then developed based on these results.

Activity-based budgeting (ABB) is more rigorous than traditional budgeting processes, which tend to merely adjust previous budgets to account for inflation or business development.

How Activity-Based Budgeting (ABB) Works

Keeping costs to a minimum is a crucial part of business management. When done effectively and not too excessively, companies should be able to maintain and keep growing their revenues, while squeezing out higher profits from them.

Using activity-based budgeting (ABB) can help companies to reduce the activity levels required to generate sales. Eliminating unnecessary costs should boost profitability.

The activity-based budgeting (ABB) process is broken down into three steps.

1. Identify relevant activities. These cost drivers are the items responsible for incurring revenue or expenses for the company.
2. Determine the number of units related to each activity. This number is the baseline for calculations.
3. Delineate the cost per unit of activity and multiply that result by the activity level.

Activity-Based Budgeting (ABB) Vs. Traditional Budgeting Processes

Activity-based budgeting (ABB) is an alternative budgeting practice. Traditional methods are more simplistic, adjusting prior period budgets to account for inflation or revenue growth. Rather than using past budgets to calculate how much a firm will spend in the current year, activity-based budgeting (ABB) digs deeper.

Activity-based budgeting (ABB) is not necessary for all companies. For example, established firms that experience minimal change typically find that applying a flat rate to data from the previous year to reflect business growth and inflation is sufficient.

In contrast, newer companies without access to historical budgeting information cannot consider this an option. Activity-based budgeting (ABB) is also likely to be implemented by firms undergoing material changes, such as those with new subsidiaries, significant customers, business locations, or products. In these types of cases, historical information may no longer be a useful basis for future budgeting.

Example of Activity-Based Budgeting

Company A anticipates receiving 50,000 sales orders in the upcoming year, with each single order costing $2 to process. Therefore, the activity-based budget (ABB) for the expenses relating to processing sales orders for the upcoming year is $100,000 ($50,000 * $2). 

This figure may be compared to a traditional approach to budgeting. If last year’s budget called for $80,000 of sales order processing expenses and sales were expected to grow 10%, only $88,000 ($80,000 + ($80,000 * 10%)) is budgeted.

Advantages and Disadvantages of Activity-Based Budgeting

Activity-based budgeting (ABB) systems allow for more control over the budgeting process. Revenue and expense planning occurs at a precise level that provides useful details regarding projections. ABB allows for management to have increased control over the budgeting process and to align the budget with overall company goals.

Unfortunately, these benefits come at a cost. Activity-based budgeting (ABB) is more expensive to implement and maintain than traditional budgeting techniques and more time consuming as well. Moreover, ABB systems need additional assumptions and insight from management, which can, on occasion, result in potential budgeting inaccuracies.