Direct vs Indirect Costs

Basis: Traceability to the Cost Object

Type	Definition	Test
Direct	Can be easily traced to cost object	”Can I count or measure exactly how much belongs here without estimating?”
Indirect	Cannot be easily traced	”Would I need to allocate or estimate to assign this?”

The Elimination Test

If the cost object disappeared tomorrow, would this cost disappear too?

Scenario	Answer	Classification
Premium Dry beer discontinued → Factory manager salary disappears?	No	Indirect to that product
Manufacturing division shut down → Factory manager salary disappears?	Yes	Direct to that division

The Causation Principle

For a cost to be direct, it must be caused by the cost object.

• Battery cost is caused by the vehicle → Direct
• Factory manager salary is caused by the factory existing, not any specific product → Indirect to products

Economic Override

Even if tracing is possible, if cost of tracing exceeds benefit, treat as indirect.

Example

Solder used in electronics assembly. You could weigh it per unit, but the administrative cost exceeds the value of that precision.

Common Trap

Textbook heuristic assumes tracing is expensive. Modern tracking systems have collapsed this cost—the “indirect because not worth tracing” logic deserves scrutiny when data infrastructure already exists.

---

North: Where this comes from

• Cost Object (classification depends on what you’re measuring)
• Cost Classification Framework (one of three axes)

East: What opposes this?

• Product vs Period Costs (different axis—location, not traceability)

South: Where this leads

• Manufacturing Overhead (where indirect manufacturing costs go)
• Activity-Based Costing (attempt to make more costs traceable)
• Overhead Allocation (how to assign indirect costs)

West: What’s similar?

• Attribution in Marketing (can you trace the sale to the ad?)
• Causation vs Correlation (both ask “did X cause Y?“)