Prime cost is still the fastest operating KPI for seeing whether your restaurant is protecting margin or leaking it. This guide explains how to calculate it, what ranges to watch, and what to fix first.
Why this matters now
This is not a theoretical topic. It shapes margin, operating speed, and the quality of weekly decisions. When operators leave it vague, they usually pay for it with more improvisation, more friction, and less control.
How to apply it in operations
- Calculate food cost and labor cost every week, not only at month-end.
- Separate whether the variance comes from purchasing, portioning, overtime, or channel mix.
- End the weekly review with one owner and one follow-up date.
What to review in the weekly meeting
- prime cost %
- food cost %
- labor cost %
Mistakes to avoid
- Watching sales only and ignoring cost structure.
- Cutting labor before checking demand and shift productivity.
- Chasing a universal benchmark instead of reading the model of the business.
Related resources
Next step
If you want this article to become a business improvement, pick one of the related resources and review the metric again next week with a clear owner.