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Stock Management and Product Costs

How to reduce waste, control spending and protect your clinic’s profit margins.

Anum Hassan, FCCA

11/6/20266 min read

Imagine this.

Your aesthetic clinic has had a busy month. The diary is full, clients are coming in, and your team has been carrying out treatments throughout the week.

You check your bank balance and sales figures. Everything looks positive.

Then you look more closely at your product purchases.

You have ordered extra dermal fillers, skin boosters and skincare products. Some items are still sitting in storage. A few are approaching their expiry dates. You have also noticed that certain treatments are costing more to deliver than you originally expected.

Where has the money gone?

This is a common challenge for aesthetic clinics. Stock is essential to delivering treatments, but poorly managed stock can quietly reduce your profits.

Good stock management is not simply about knowing what is in your cupboards. It is about understanding what you buy, what you use, what you waste and how much each treatment really costs.

Let us look at how to manage stock more effectively and keep control of product costs in your clinic.

1. Why stock management matters for aesthetic clinics

Aesthetic clinics often hold a wide range of products, including:

Dermal fillers and skin boosters.
Professional skincare products.
Treatment consumables.
Needles, syringes and other clinical supplies.
Aftercare products.
Retail skincare products sold to clients.

Each product has a cost. Some have a limited shelf life, while others may need specific storage conditions.

When stock is not monitored properly, several problems can develop:

Money gets tied up in unused products. Buying too much stock means cash is sitting on your shelves instead of being available for wages, rent, marketing or other business costs.

Products expire before they are used. This turns money spent on stock into a loss.

You run out of important items. A missing product can mean rearranging appointments, disappointing clients or losing treatment revenue.

Your treatment costs become unclear. If you do not know how much product each treatment uses, it becomes difficult to set prices that protect your profit.

A simple stock management process can help prevent these problems.

2. Know exactly what stock your clinic holds

The first step is to understand what you already have.

Many clinics order products regularly but do not always maintain an accurate record of what remains in stock.

A spreadsheet or suitable stock management system can make a big difference.

Your stock record should include:

Product name and brand.
Supplier.
Date purchased.
Quantity received.
Purchase price.
Batch or lot number.
Expiry date.
Storage location, where relevant.
Quantity used, wasted or remaining.

For example, imagine your clinic purchases 20 boxes of a skincare product at £30 each.

Your total purchase is £600.

If you sell only eight boxes during the month, you should still know that 12 boxes remain in stock.

Without an accurate record, it is easy to order more unnecessarily.

Start with a full stock count. Then update your records whenever products arrive, are used, sold, transferred or written off.

The system does not need to be complicated. It needs to be accurate and updated consistently.

3. Understand the true cost of your treatments

One of the biggest mistakes a clinic can make is pricing treatments without knowing their actual product costs.

For example, suppose you charge £250 for a treatment.

The product used costs £80.

At first glance, you might think the clinic makes £170.

However, the product is not the only cost involved.

You may also need to consider:

Needles, syringes and other consumables.
Anaesthetic or preparation products, where applicable.
Practitioner time.
Room costs.
Payment processing fees.
Other treatment-related expenses.

Let us use a simple example.

Item Cost

Treatment price £250

Main product £80

Consumables £10

Practitioner cost £45

Payment fee and other direct costs £5

Remaining contribution £110

This is an illustrative calculation, not a full profit figure. Rent, marketing, administration, insurance and other overheads may still need to be covered.

The important point is that your treatment price should be based on more than the purchase price of the main product.

Review your treatment costs regularly, particularly when suppliers increase prices.

4. Avoid over-ordering and unnecessary stock

Buying in bulk can sometimes offer a lower unit price.

However, a cheaper purchase does not always mean a better business decision.

Imagine a supplier offers a discount if you purchase 30 units instead of 10.

You save £5 per unit.

That sounds attractive. However, if your clinic only uses 12 units before the products expire, the saving may be outweighed by the cost of unused stock.

Before placing a large order, consider:

How quickly does your clinic use this product?
How many appointments are already booked?
Is demand consistent or seasonal?
How long is the product's remaining shelf life?
Is the bulk discount worth the cash tied up in stock?

Use your previous sales and treatment records to estimate demand.

It is often better to order smaller quantities more regularly than to fill your storage space with products you may not need.

5. Keep track of expiry dates and product wastage

Expired stock is money lost.

This is particularly important for aesthetic clinics holding products with specific expiry dates or storage requirements.

A useful approach is First Expiry, First Out (FEFO).

This means using suitable products with the earliest expiry dates first, rather than simply using whichever product was purchased first.

You should also:

Check expiry dates during stock counts.
Keep short-dated products clearly identified.
Separate expired, damaged or recalled products from usable stock.
Record products that are wasted or discarded.
Review why wastage is happening.

For example, if your clinic regularly writes off £150 worth of products each month, that adds up to £1,800 over a year.

That is money that could have been used elsewhere in the business.

Do not overlook small amounts of wastage. They can become a significant cost over time.

For medicines and other products with specific storage or handling requirements, always follow the relevant manufacturer instructions and your clinic's clinical governance procedures.

6. Make stock control part of your team's routine

Stock management should not depend on one person remembering what has been used.

Everyone involved in ordering, receiving or using products should understand the process.

A simple routine could look like this:

When stock arrives

Check the delivery against the order and supplier documentation. Record the quantity, batch details and expiry dates, and check that the products have arrived in suitable condition.

When stock is used

Update the stock record promptly. Where appropriate, connect the product details to the relevant patient treatment record.

At the end of each week

Check frequently used products and identify anything running low.

At the end of each month

Carry out a stock check, review wastage and compare actual stock with the records.

For injectable medicines and other products requiring traceability, make sure the clinic can identify the relevant batch and link it to the appropriate treatment records.

Good records support both business control and patient safety.

7. Understand how stock affects your clinic accounts

Stock management is not only an operational task. It also affects your accounting figures.

Your purchases, stock levels and treatment costs all contribute to understanding how profitable your clinic really is.

For example, if you purchase £5,000 of products during a month, it does not automatically mean that the full £5,000 represents the cost of products used during that month.

Some of those products may still be in stock.

A simplified cost of goods calculation is:

Opening stock + purchases - closing stock = cost of goods used or sold

For example:

Description Amount

Opening stock £2,000

Purchases during the month £5,000

Closing stock £3,000

Cost of goods used or sold £4,000

This gives a more useful picture of the stock cost for the period than looking at purchases alone.

For accounting and tax purposes, stock valuation also matters. HMRC guidance generally recognises stock valuation at the lower of cost and net realisable value, subject to the applicable accounting rules.

Your accountant can help make sure stock is recorded and valued correctly in your accounts.

8. Watch your stock spending and cash flow

A clinic can be profitable on paper but still experience cash flow pressure.

This can happen when too much money is spent on products before the clinic has generated revenue from using or selling them.

For example, spending £4,000 on products in one week may leave less cash available for rent, wages, bills and other commitments.

Try to plan stock purchases around actual demand.

Review your spending each month and compare it with your treatment revenue.

Ask yourself:

Which products are we buying most often?
Which products are selling or being used regularly?
Which items are sitting unused?
Are supplier prices increasing?
Are we ordering more than we need?

This helps you make better purchasing decisions and avoid unnecessary pressure on your cash flow.

9. Five simple stock management habits to start today

You do not need an expensive system to improve stock control.

Start with these five habits:

1. Carry out a regular stock count.
Know what you have before placing another order.

2. Record every purchase and product movement.
Do not rely on memory or informal messages.

3. Check expiry dates.
Use suitable products with the earliest expiry dates first.

4. Calculate product costs per treatment.
Make sure your prices reflect the real cost of delivering each service.

5. Review stock spending every month.
Identify unnecessary purchases, wastage and slow-moving products.

Small improvements can make a real difference when they become part of your normal routine.

Final thoughts: Better stock control means better business decisions

Your products are a major part of running an aesthetic clinic. They affect your treatment prices, profit margins, cash flow and day-to-day operations.

Poor stock management can lead to expired products, unnecessary purchases and unclear treatment costs.

Good stock management gives you better visibility of where your money is going.

You can see which products are costing the most, which treatments are generating a healthy return and where you may be losing money through wastage.

At Aesthetic Accounts, we understand that running an aesthetic clinic involves much more than looking after clients. You also need to keep a close eye on the numbers behind the business.

Need help understanding your product costs, stock figures or clinic profitability?

Aesthetic Accounts can help you make sense of your numbers and make more informed business decisions.

Book a meeting with Aesthetic Accounts: https://calendly.com/hello-aestheticaccounts/15min