Rework Cost Calculator

Rework Cost Calculator

Rework is a frequently underappreciated hidden cost in manufacturing - it consumes labor and material capacity a second time on units that should have been made correctly the first time.

Formula

Cost Per Unit = (Rework Labor Hours x Labor Rate) + Rework Material Cost
Total Rework Cost = Cost Per Unit x Units Requiring Rework

Example

50 units needing rework, 0.5 hours labor at $25/hour, plus $3 material cost each:

Cost Per Unit = $15.50 → Total Rework Cost = $775

Why This Cost Often Goes Unnoticed

Rework directly reduces effective production capacity even when reworked units ultimately ship as good product - but because it typically gets absorbed into general labor and material budgets rather than tracked as its own line item, the true scale of rework cost often goes unnoticed until explicitly calculated and called out.

Building the Business Case for Quality Improvement

Tracking this cost explicitly helps build a much clearer business case for quality improvement investments aimed at reducing the root causes of rework in the first place - a proposed process improvement that seems expensive in isolation often looks very different once compared against the ongoing rework cost it would eliminate.