Activity-Based Costing

Activity-based costing is a way to assign shared costs to products, jobs, or services based on the activities that actually drive those costs.

Many costs are easy to trace. Materials used on a job are direct. A delivery fee charged to one customer is direct. But rent, admin wages, machine maintenance, software, quality checks, and dispatch costs often support many parts of the business at once.

Activity-based costing, often shortened to ABC, tries to allocate those shared costs more fairly.

Where Activity-Based Costing Appears

You may see activity-based costing in management accounting, job costing, manufacturing reports, product pricing, service profitability, project reporting, and internal cost reviews.

It links closely with activity base, allocated costs, allocations, activity-based budgeting, and budget.

How Activity-Based Costing Works In Practice

ABC usually follows four steps:

identify the main activities that create overhead costs
group costs by activity
choose an activity base or cost driver
allocate the activity costs to products, jobs, customers, or services

The aim is to show what each product or job really consumes, not just spread overheads using one broad percentage.

Simple Example

A maker sells two products. Product A is simple and made in large batches. Product B is customised and needs more inspections, setup time, and customer support.

If overhead is spread only by labour hours, Product B may look cheaper than it really is. Activity-based costing can assign more inspection and setup cost to Product B because that product uses more of those activities.

Why Activity-Based Costing Matters

ABC can reveal which products, jobs, or customers are less profitable than they look. That can help with pricing, process changes, product mix, and deciding which work is worth chasing.

It can also become too detailed if the business tries to track every tiny activity. The useful version is practical enough to maintain and accurate enough to improve decisions.

How Gimbla Can Help

Gimbla keeps the underlying bills, invoices, expenses, projects, and reports organised, which gives your accountant or finance team cleaner data for cost analysis and allocations.

Helpful Gimbla Guides

In Short

Activity-based costing matches shared costs to the activities that cause them. It helps businesses see more realistic margins by product, job, customer, or service.