Salon inventory management

Inventory is a quiet hole in most salon budgets. Colour, developer, shampoo, cotton, disposables and the retail shelf at reception — every one of them is money sitting on a shelf. When you can't see it clearly, it leaks three ways at once: through over-ordering, through expired product and through stock that vanishes with no explanation.

The good news is that stock behaves predictably. A handful of systematic rules turn it from something you pay for into a number you control. This guide covers what actually works in hair salons, beauty studios, barbershops and nail bars alike.

Separate back-bar from retail stock

The first and most important step is to distinguish two completely different kinds of stock:

• Back-bar (professional consumables) — what you use up during a service: colour, developer, masks, disposables. It is a cost hidden inside the price of the service.
• Retail — products you sell for clients to take home. It is goods with a profit margin.

These two categories have different ordering logic, different margins and different expiry risk. Track them together and you'll see neither the true cost of a service nor the true profit on a sale. Separate stock records are the foundation everything else stands on. The link between consumption and price is something we dig into in how to price your services.

Set par levels and reorder points

For every item, define two numbers:

1. Par level — the minimum quantity that must always remain in stock so you never run dry mid-day.
2. Reorder point — the level at which you automatically reorder. Calculate it from average weekly usage multiplied by your supplier's lead time, plus a small buffer.

Example: if you use 10 units of developer a week and the supplier delivers in 5 days, your reorder point is roughly 10 units. Drop below it and you order. This simple maths kills both panic buying and bloated shelves. How much capital is locked up in stock is one of the salon KPIs you should track.

Cut waste, expiry and theft

The three main sources of loss each have a different fix:

• Expiry — run stock on FIFO (first in, first out): new product to the back, older product to the front. Watch expiry dates on colour and cosmetics.
• Over-use — measure how many grams of colour actually go into a service. Over-dispensing back-bar is the most common hidden loss in hairdressing.
• Theft and "shrinkage" — without records, nobody notices five shampoos are missing. Regular stocktakes and movement checks bring it to light.

Clear stock rules also tie into how you run your team — who may order and who may write off. That topic is covered in the article on hiring and keeping salon staff.

Work out the cost per service

This is a number most salons don't know — and it decides profitability. Take the real back-bar consumption for a specific service (colour, developer, mask, disposables) and add it up at purchase prices. The result is the material cost per service.

Only with this number does a service price make sense. If highlights cost €7 in materials, you can't sell them at €24 and expect a healthy margin after labour and overhead. Tying consumption to price is the core of your salon pricing strategy, and it rests on data your point of sale gives you.

Consolidate suppliers and orders

Fragmented ordering across five suppliers means higher prices, higher shipping and chaos. What helps:

• Consolidate orders where you can and negotiate volume discounts.
• Keep a purchase price and lead time on every item.
• Order on the rhythm set by your reorder points, not by gut feel.

Disciplined purchasing is one of the first things to get right before you think about growth — such as opening a second location, where every inefficiency multiplies.

Automate stock counts through your POS

A manual spreadsheet works for a month, then nobody updates it. Real control comes from software that deducts stock automatically.

When you connect sales to your point of sale, every product sold is subtracted from stock on its own and you see quantity and value in real time. When choosing a system, it pays to think about inventory from day one — what to ask is summed up in how to choose a POS for your salon. And because so much retail is now paid by card, the whole process is smoother once you can accept card payments in your salon right at the counter.

Booking and operational data also sit together neatly when your booking system is linked to the POS — service consumption can then be matched to a specific appointment.

A quick checklist

• Separate records for back-bar and retail.
• Par level and reorder point on every item.
• FIFO and expiry tracking.
• Measured material consumption per service.
• Consolidated suppliers with recorded prices and lead times.
• Automatic stock deduction from the POS plus regular stocktakes.

Put these in place and inventory stops being a black hole and becomes a margin tool. The fastest way to start is to create a free YourSalon account and connect sales to stock today.