Where margin quietly leaks away

Nobody loses a practice to one bad decision. If it were one decision you would see it coming, think about it properly, and probably get it right. Margin does not go that way. It goes through eleven small lines that each renew on their own schedule, each cost a little more than they should, and none of which is ever the most urgent thing on your desk.

I found this out the hard way in my own clinic. I am a Chartered Accountant, so reviewing supplier invoices is closer to a hobby than a chore, and I still let it run for years before I sat down and did it properly. When I finally did — comparing across suppliers, renegotiating, switching where I could not, consolidating orders to hit volume breaks — we took about 15% off the cost base. Some lines moved 5%. One moved nearly 50%.

The 50% line is the one that should worry you. It was not exotic. It was something we bought every month, from a supplier we liked, at a price nobody had questioned since the account was opened.

Here is where to look, in the order I would look now.

1. The lines that renew without asking

Start here, because this is where the money is and it takes no negotiation at all — only attention.

Every practice has a set of contracts that roll over automatically: energy, building and contents insurance, professional indemnity, clinical waste collection, alarm and monitoring, telephony and broadband, practice-management software, the water cooler nobody remembers ordering. Each one renews on its own anniversary, usually with an uplift, usually announced in an email that arrives in a busy week.

The structural problem is not the uplift. It is that the renewal date is the only moment you have leverage, and it passes without you noticing. A supplier who knows you have not shopped around has no reason to sharpen the price, and every reason to apply the annual increase.

The fix is embarrassingly low-tech. Build one list — supplier, what it is for, annual cost, renewal date, notice period. Put every renewal date in your calendar with a reminder eight weeks before. That is the whole system. The eight weeks matters because most contracts have a notice period of 30 to 90 days, and the single most expensive thing you can do is discover a renewal after the window to leave has closed.

When you have that list, sort it by annual cost and work down from the top. You will find you have been giving equal attention to a £280-a-year line and a £9,000-a-year line.

2. Card processing

I put this second only because it deserves its own heading, not because it is second in size. For most practices taking card payments it is one of the largest controllable costs in the business, and it is almost universally the least examined.

The reason is design. A merchant statement is four pages of interchange fees, scheme fees, authorisation fees, a monthly terminal rental, a PCI compliance charge, a "non-secure transaction" premium and a line called something like non-qualifying rate which quietly captures a chunk of your business-card and international transactions. It is not written to be read. Almost nobody reads it.

What to do: take your last full monthly statement, find the total of every charge, and divide it by the total value of card payments you took that month. That single percentage is your effective rate, and it is the only number that matters. It is usually meaningfully higher than the headline rate you were sold.

Once you have it, you have something to negotiate with — or something to compare. Most owners who do this arithmetic for the first time find they are paying somewhere between a third and double what they could be.

3. The consumables you buy constantly

This is where the classic price gap lives — the same box, the same brand, two practices, materially different prices, for years.

It persists because of an information asymmetry that is total. Your supplier knows exactly what every practice in your area pays. You know what you pay. That is the entire game, and it is why a rep can quote you a number with complete confidence that you have no way to test it.

Three things move the needle:

• Consolidate to hit volume breaks. Spreading the same spend across four suppliers means missing every tier with all four. Concentrating it — even partially — reaches pricing you were already spending enough to qualify for.
• Ask for the price list, not the price. Reps quote per-item. Ask for the tiered schedule and you find out where the next break sits, which is often much closer than you assumed.
• Separate the clinical decision from the buying decision. There are products where the brand is genuinely the clinical choice and substituting is not on the table. There are also products where you have been buying a brand out of habit since training. Be honest about which is which, product by product. Nobody else can do this bit for you — and nobody should.

4. Subscriptions, seats and the things that scaled without you

Software crept into every practice as a licence and stayed as a subscription, which means the cost now grows with headcount and time rather than sitting still.

Pull the last twelve months of bank and card statements and list every recurring payment under about £200 a month. This is genuinely uncomfortable the first time. Most practices find at least one service they stopped using, one they are paying for twice under different names, and a seat count that reflects a team member who left eighteen months ago.

Annual billing is usually 15–20% cheaper than monthly for anything you are certain you will keep — but only for those. Paying annually for something you are lukewarm about just buys a year of not deciding.

5. Payment terms, which are not a cost but behave like one

If you pay on receipt while your suppliers offer 30 days, you are funding their working capital out of yours. That is not a price problem, but it shows up in the same place: the bank balance in a tight month, which is exactly the month when a corporate acquirer's offer looks most reasonable.

Ask for terms. Ask about early-settlement discounts and do the arithmetic before taking one — a 2% discount for paying 30 days early is an excellent return, and one many practices decline out of habit.

What this is worth

I want to be careful here, because the honest answer is that it depends entirely on how long the leaks have been running. In my practice it was around 15%, off a base that I had already assumed was reasonably well managed. Yours might be less. If nobody has looked in five years, it will not be less.

The point that matters more than the percentage: every pound you take off the cost base is a pound of margin your patients never feel. You did not raise a fee. Nobody chose a cheaper option or rang round for a price. It is the only saving in the business that costs your patients nothing, which makes it the first place to look and not the last.

The bit you should not have to do alone

Everything above works. It also took me months — spreadsheets, phone calls, asking colleagues what they paid, cross-referencing line by line. Most owners do not have those months, and that is not a character flaw. It is arithmetic: a corporate group has someone whose entire job is this, and you have an evening.

That is the gap SupplyIndex exists to close, from both ends. We negotiate rates with suppliers on behalf of a lot of independent practices at once, so you get group pricing without joining a group. And we are building an invoice-verified benchmark of what practices actually pay, so the next time a rep quotes you a number, you know whether it is a good one.

Both are free to members — suppliers pay us, never you. If you want to start with the line most likely to be leaking, start with card fees.