Service and retail are two different businesses
Blending service and retail into one gross margin produces a number that describes neither. They have different cost structures, different working capital and different reasons to exist.
The two profiles
| Service | Retail | |
|---|---|---|
| Main cost | Provider labour, 35–50% of the ticket | Product cost, typically 45–55% of retail price |
| Constraint | Available treatment hours | Shelf space and working capital |
| Working capital | Almost none | Inventory sits until it sells |
| Scales with | Capacity and utilisation | Traffic and attachment rate |
| Fails by | Empty rooms | Dead stock |
Combining them means a strong retail month can mask a weak service month, and a slow-moving shelf can sit for a year without anyone noticing, because the blended margin barely moves.
What retail is actually for
Retail rarely justifies itself on its own margin. Its case is that it extends the treatment result, which improves rebooking, and that it adds revenue that does not consume a treatment hour.
Both are real, and both are testable. The metric is attachment rate — the share of service visits that include a retail purchase — and retail revenue per service visit. If those are flat while inventory grows, the shelf is a storage cost rather than a business.
Quarterly at minimum, monthly if retail is meaningful. Untracked inventory is where shrinkage, expiry and provider self-use quietly accumulate.
Backbar is not retail
Product used during treatment — backbar — is a cost of delivering the service. Product sold to the client is retail. They are frequently bought together, sometimes at the same price, and often coded to the same account.
They belong in separate accounts. Backbar sits in cost of service and drives service margin. Retail product sits in inventory until sold. Combining them makes service margin look better than it is and retail margin worse.
What to track monthly
- Service revenue and service margin, with backbar and provider cost inside it.
- Retail revenue and retail margin, with product cost inside it.
- Attachment rate and retail revenue per service visit.
- Inventory on hand, in dollars and in months of supply.
- Shrinkage — the gap between counted inventory and what the system says.
- Dead stock — anything with more than six months of supply on the shelf.
Frequently asked
What retail margin should we expect?
Professional skincare typically buys at 45–55% of retail, so gross margin before shrinkage and commission lands broadly in that range. What matters more is turns — a 50% margin on stock that sells twice a year is worse than a 40% margin on stock that sells eight times.
Should retail commission match service commission?
Usually not. Retail margin is thinner, so the same rate leaves far less contribution. Most spas run a lower retail rate, and the rate should be set against retail margin rather than against the service rate.
How do we handle product used during treatment?
Backbar is a cost of service, not retail inventory. Separate account, separate purchasing if you can. Mixing them makes both margins wrong.
How often should we count inventory?
Monthly if retail is a meaningful share of revenue, quarterly at absolute minimum. Shrinkage and expiry in this category are real, and neither shows up in any report until someone counts.
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