Abnormal loss
Abnormal loss is actual process loss exceeding the normal allowance for the relevant input. Equivalently, actual good output is below expected good output. Measure the excess rather than classifying a loss solely from its cause. Its cost is separately identified rather than used to inflate the normal unit cost of good production. Valuation depends on completion and scrap assumptions; the simple example assumes full completion and no scrap value.
Worked example
Input 1,000 units costs $4,750; normal loss is 50 units, so expected good output is 950 and cost per good unit $5. Actual output 930 creates 20 abnormal-loss units, valued at $100.
Common mistake
Abnormal does not mean outside management’s control. Compare actual and expected output before deciding the quantity and investigate responsibility separately.
Where it appears in your exams
| Qualification | Exam | Relationship | Period |
|---|---|---|---|
| ACCA | MA | Direct | September 2026–June 2027 |
| FIA | FMA | Direct | September 2026–June 2027 |
