Is Activity-Based Costing worth the extra complexity, or is traditional overhead allocation enough for your business?
My business has product lines that vary a lot in complexity — why does traditional overhead allocation give me a distorted picture of what each one actually earns?
Traditional overhead allocation relies on one or two measures — usually direct labour hours or machine hours — and spreads all indirect costs across products in proportion to how much of that single measure each one uses. The assumption is that every product consumes overhead in the same ratio it consumes labour hours, which breaks down once you have a simple, high-volume product sitting alongside a complex one that needs far more setup, quality checks, and handling.
Activity-Based Costing takes a different approach: it identifies the actual activities that drive cost (a production run setup, a quality inspection, receiving materials, processing an order), assigns each activity a cost driver that reflects what genuinely consumes it — number of setups, number of inspections, number of orders — and then allocates cost to products based on how much of each activity they actually consume, not a single blanket labour-hour rate.
In practice, this often reveals that the simple, high-volume product had been absorbing more overhead than it should under the traditional system, while the complex or low-volume one was under-costed — meaning you may discover a product is actually losing money while you believed it was profitable. ABC isn't the right fit everywhere, though: if your products are fairly similar or overhead itself is a small share of total cost, the effort of building and maintaining an ABC system may not be worth the added precision it delivers.
The right call depends on how diverse your product or service lines are and how large your indirect costs actually are — an assessment RASEEKH works through with clients before recommending a full change to their costing system.