Inventory Discipline — Hidden Margin Most Owners Leave on the Table
I'm going to say something that's going to mildly annoy half the vet hospital owners reading this.
You don't really know what your inventory costs you.
You know what you spent on Henry Schein last month. You know your COGS as a percent of revenue is "around 22%, give or take." You know where the heartworm tests live. You know that one drawer in the back surgery prep room has expired stuff in it.
But you don't actually know:
What your true on-shelf inventory value is on any given day
How much of it is going to expire before it's used
How much shrinkage you have (theft, miscount, give-aways, uncharged)
How much SKU duplication you're carrying (three brands of the same NSAID because three doctors have preferences)
How much you're paying for the same drug from two different vendors
I'm not picking on you. Most independent hospitals run this way. It's not a flaw — it's just the consequence of being a clinic that grew, not a clinic that was built. But it's one of the highest-leverage margin moves you can make, especially in the 12-24 months before a sale.
Let's walk through it.
1. Inventory Is a Margin Lever, Not a Storage Problem
The reason this matters: every dollar of inventory waste is a dollar off your bottom line. And every dollar off your bottom line is multiplied by your multiple at sale.
If your hospital sells at, say, 5x EBITDA, and you can recover $30K of leakage in inventory in a clean year — that's $150K of sale price. Off ONE category. Off processes you control completely. You don't need to win new clients. You don't need to raise prices. You don't need to hire. You just need to not waste.
That's the framing I'd encourage you to start with. Inventory isn't a storage and supply problem. It's a margin lever. Every habit fix has a real dollar value at closing.
Action Items / Food for Thought:
Pull your COGS line as a percent of revenue for the last 36 months. Is it stable, drifting up, or jumping around?
Compare to industry benchmarks for your hospital type. General practice, you're targeting 19-23% of revenue. ER and specialty run higher. If you're meaningfully above your benchmark, there's almost certainly recoverable margin
Calculate what 1 percentage point of COGS recovery is worth in dollars at your annual revenue. Now multiply that by 5x. That's the prize
2. Set Par Levels — Stop Reordering by Vibes
The single most common practice I see is an inventory tech, or sometimes the practice manager, eyeballing the shelf and reordering when something "looks low."
That works. It also overstocks slow movers and understocks fast ones. It builds in shrinkage and expiry. And it makes it impossible to know what your inventory actually costs you across a year.
The fix is boring and effective: par levels. For every SKU on your shelf, define a minimum (when do we reorder) and a maximum (how much do we hold). Tie those numbers to actual usage rates, not gut feeling.
Yes, this takes someone a couple of weeks of focused work to set up. Yes, it's a hassle. Do it once, maintain it monthly, and you'll save 5-10% on inventory cost without changing what you stock.
Action Items / Food for Thought:
Identify your top 50 SKUs by spend. Those represent ~80% of your inventory dollars. Start there
For each, calculate average monthly usage over the last 12 months
Set par levels at 1.5x average monthly usage as a rough starting point. Adjust for lead time and case mix
Make this an explicit part of one person's job description. Inventory is a job, not a chore
3. Vendor Consolidation Without Losing Optionality
Most hospitals work with 5-8 supply vendors. Henry Schein, MWI/Patterson, a couple of specialty pharmacies, a compounding pharmacy, Amazon for the random stuff, a local rep who keeps coming by.
That's not necessarily bad. But here's what usually IS bad: nobody is tracking which vendor has the best price on the same SKU at any given time. And the rebates and volume tiers are spread so thin across vendors that you're not maximizing them anywhere.
You don't need to consolidate down to one vendor. You need to consolidate down to a primary and a backup, with deliberate exceptions for compounding and specialty items. Then you negotiate the volume tier you actually qualify for at your primary, instead of leaving rebate dollars on the table.
I've seen 3-6% recoverable just on the vendor consolidation move alone. That's pure margin.
Action Items / Food for Thought:
Audit one quarter's worth of supply invoices. How many vendors? How much spend at each?
Identify the top 20 SKUs by spend. Are they being purchased from the cheapest available vendor?
Talk to your reps about volume tiers. Most owners have no idea what tier they're actually in or what the next one would save them
4. Expiry Is Not a Surprise — It's a Process Failure
If you've ever found a half-empty bottle of expired carprofen tucked behind something newer, you know what I'm talking about.
Expired drugs and supplies are pure waste. They were paid for, they were never used, they're going in a sharps container or down a drain. That's a margin number that doesn't show up cleanly on any report unless you make it.
The fix is FIFO discipline (first in, first out) and a quarterly expiry sweep. Five hours of someone's time, four times a year. That's it. The savings are dramatic and they show up in COGS percentage in 6-9 months.
Action Items / Food for Thought:
Do a baseline expiry audit RIGHT NOW. Walk every shelf, every drawer, every closet. Photograph and total the expired SKUs. Most hospitals are surprised by what they find
Set a quarterly recurring task. Put it on the calendar
Adopt FIFO physically — newer stock goes BEHIND older stock, not in front. Train it, then audit it
5. Shrinkage Is Real and Nobody Wants to Talk About It
I'm not accusing anyone. But hospitals have shrinkage. Some of it is honest miscounting. Some of it is expired stock that wasn't logged. Some of it is the senior tech who takes home flea/tick for their personal animals on a not-quite-formal employee discount. Some of it, occasionally, is theft.
You don't fix shrinkage by suspecting your team. You fix it by introducing simple controls that make it harder to be sloppy:
Monthly count of high-value items (controlled drugs are already required, but extend the discipline)
Reconciliation between purchases received and product dispensed
A formal employee discount policy with logging — generous is fine, undocumented is not
When you put these in place, shrinkage usually drops without anyone needing to be fired or accused.
Action Items / Food for Thought:
Calculate a rough shrinkage estimate: (purchases received − inventory used in invoices − ending inventory change) ÷ purchases. Anything north of 4-5% in non-controlled SKUs is worth investigating
Implement a monthly count on your top 20 high-value SKUs
Document your employee discount policy in writing. Distribute it. Get sign-offs
6. The Pre-Sale Dividend
Here's why I'm spending a whole article on this.
Buyers see clean inventory practices on diligence and they react two ways:
Their offer goes UP because the COGS line is provably defensible
Their post-close transition risk goes DOWN because they trust the financials
When inventory is run on vibes, buyers discount your COGS savings claims, build a contingency in their model, and quietly knock 5-10% off their offer. They don't tell you it's because of inventory. They tell you it's "diligence findings" or "market conditions." But it's there.
If you're 12-24 months from a potential sale, this is one of the highest-ROI moves you can make. It's invisible, it's cheap, and it shows up on your income statement before you even start having buyer conversations.
Action Items / Food for Thought:
Tie your inventory discipline goals to a specific pre-sale window. "I want to be at X% COGS by the end of next year."
Track monthly. Report quarterly to yourself
When buyers ask about inventory practices in diligence, you want to be able to hand them a binder, not an apology
Final Thought
You can't out-grow waste. You can't price-increase your way around shrinkage. And you can't fix it the week before you list the practice.
Inventory discipline is one of those quiet, unglamorous habits that separates a hospital that sells at the top of the range from one that gets a "fair" offer. Buyers see it. Brokers see it. CPAs see it.
The good news? It's controllable. The owners who treat inventory like a margin category, not a closet, get rewarded for it — both in operating profit while they own it AND in sale price when they exit.
Stop reordering by vibes. Start running your inventory like the line item it is.
That's where the hidden margin lives.
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