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Inventory conversion costs

Conversion costs include direct production labour and a systematic allocation of fixed and variable production overheads. Allocate variable overhead based on actual use of production facilities. Allocate fixed overhead systematically using normal capacity; unusually low output does not justify loading all idle capacity costs onto the few units produced. Selling and administrative costs generally do not form part of conversion. The allocation should reflect production activity and exclude amounts caused by abnormal waste.

Worked example

Factory workers' wages and allocated factory depreciation form part of conversion cost.

Common mistake

Direct materials are a separate cost of purchase or production, not conversion cost; abnormal waste is expensed.

Where it appears in your exams

QualificationExamRelationshipPeriod
ACCA F1 Direct July 2027–August 2028
ACCA F2 Direct July 2027–August 2028
ACCA FA Direct September 2026–June 2027
ACCA K1 Direct July 2027–August 2028
CIMA BA2 Direct Official assessment-window verification pending
CIMA F1 Direct Official assessment-window verification pending
FIA FFA Direct September 2026–June 2027

Related terms

Also called: Inventories costs of conversion