Veterinary Practice Due Diligence in 2026: What Buyers Check Before They Close

Key takeaways

• Due diligence is the buyer’s hunt for reasons to pay less — the deep review that runs after the letter of intent, where every number, contract, and compliance record gets tested against what you said was true.
• The price you signed at the LOI is not the price you keep unless diligence confirms it. When a buyer lowers the number mid-process, the industry calls it a re-trade, and it is almost always preventable.
• A buyer’s Quality of Earnings audit is their accountants’ job, not yours. The seller-side equivalent is a pre-sale financial review run by your advisor, months earlier, so nothing surfaces later that you have not already fixed.
• Concentration is the quiet valuation-killer — too much revenue running through one doctor, one referral source, or one payer reads as fragility, and fragility gets priced down.
• Preparation plus competitive tension is the whole defense. A prepared seller with other qualified bidders still at the table keeps the price they were promised.

There’s a phone call I get more than any other, and it almost never comes at the start of a deal. It comes about 6 weeks after the letter of intent gets signed, when the buyer’s team has been inside the numbers for a month.

The vet on the other end of the line sounds different than they did when we first talked. Quieter.

They tell me the buyer “found some things” and wants to “revisit the price.”

That call is the subject of this article. Not the offer, not the multiple, not the celebration when the letter of intent gets signed.

The part nobody warns owners about: the diligence phase, where a deal you thought was done gets pulled apart line by line, and where most of the value owners lose after a strong offer actually disappears.

I’ve written this as the most honest guide I can give you to what a buyer’s team actually looks at before they close on a veterinary practice, and how to walk into that review so prepared that there is nothing left for them to find. This is not the whole sale process.

We cover that in our guide to selling a veterinary practice. This is the deep dive on the one phase that quietly decides whether you keep the number you were promised.

Due diligence is the deep review a buyer runs after the letter of intent — the deep review a buyer runs after the letter of intent to confirm that everything you represented about the practice is actually true before money changes hands. Across veterinary practice sales, that review runs roughly 60 to 120 days and touches finances, operations, contracts, real estate, staffing, and compliance.

Its entire purpose is to test your story and, where it can, to find a reason to pay less than the headline. The owner who understands that going in is the owner who keeps their price.

Why the diligence phase is where money actually moves

Most owners spend all their worry on the offer. They obsess over the multiple and the headline number, sign the letter of intent, and exhale.

That exhale is the mistake.

A letter of intent (the short document that sets the general terms before the deep review) is not a binding price. It is a price the buyer is willing to pay if everything you said checks out.

The verification is diligence, and diligence is where a single bidder with no competition does their most patient work.

As dvm360 put it plainly in its coverage of practice sales, the moment you sign the letter of intent the whole process changes, and the buyer’s goal during the review is to find financial information that lowers the price they said they would pay. That is not cynicism.

That is the rational behavior of any buyer who knows the seller has already mentally spent the money and has no other bidder waiting.

The industry word for lowering the price after the letter of intent is a re-trade. A re-trade happens when diligence surfaces something the buyer says changes the value, and the number drifts down between the handshake and the closing.

On a meaningful practice, a re-trade of even 5 to 10 percent is hundreds of thousands of dollars, and I have watched owners absorb it simply because they had no leverage left to push back.

The defense is two things working together. Be prepared enough that there is nothing real to find.

And keep other qualified buyers engaged so that walking away stays a credible threat. Take away either one and a single buyer’s diligence team controls the back half of your deal.

The diligence phase, the way I’d walk you through it over dinner

When I sit with a vet who has just gotten a strong offer, the first thing I do is reset what comes next. The offer was the easy part.

Now a team of accountants and lawyers you have never met gets read-only access to your practice’s life story, and their job is to stress-test all of it.

It helps to know the categories before they arrive, because they are predictable. A buyer’s team works through the same buckets on nearly every deal: the financials and the quality of the earnings, the support behind your add-backs, doctor productivity, how concentrated your revenue is, your contracts and lease and real estate, your staffing and key-person risk, and your regulatory and medical-record compliance.

The table below is the one I wish every owner had taped to their office wall before they went to market. It lays out each category, what the buyer’s team is actually testing inside it, and what being ready looks like on your side of the table.

Diligence category	What the buyer’s team checks	How to be ready
Financials and Quality of Earnings	3 to 5 years of statements and tax returns, the general ledger, revenue recognition, margin trends, whether EBITDA is real and recurring	Have an advisor run a pre-sale financial review that mirrors the buyer’s audit, months early
Add-back support	Whether each normalization is documented and defensible, or aggressive and unsupported	Build a schedule with receipts and explanations for every add-back before going to market
Doctor productivity	Revenue and production per doctor, associate output, whether the owner is the majority producer	Diversify production so no single doctor, especially you, dominates the numbers
Revenue and client concentration	Reliance on one doctor, one referral source, one large client, or one payer	Broaden the base so no single source drives a disproportionate share of revenue
Contracts, leases, real estate	Lease assignability, rent terms, vendor and equipment contracts, any change-of-control clauses	Confirm the lease can transfer; gather and review every contract in advance
Staffing and key-person risk	Whether key doctors and managers stay, retention agreements, wage and classification exposure	Paper your key people and confirm staffing holds through a transition
Regulatory and compliance	Licenses, DEA registration, controlled-substance logs, medical records, OSHA, employment classification	Audit and clean up every license, log, and record before a buyer asks

None of these are exotic. What surprises owners is the depth.

A serious buyer, and especially a PE-backed group with a full diligence team, goes far deeper into the practice’s finances than most owners have ever looked themselves.

Financial diligence and Quality of Earnings: the buyer’s audit

The center of gravity in any diligence process is the financial review, and on a practice of real size the buyer runs a formal version of it called a Quality of Earnings audit (QoE) — the deep financial review the buyer’s accountants run before closing, to test whether your EBITDA holds up under scrutiny and how much of it is durable, recurring profit.

Worth being precise here, because owners get this wrong constantly. A Quality of Earnings audit is the buyer’s tool, commissioned and paid for by the buyer’s side.

As the M&A advisory firm EdgePoint describes it, a QoE is a forensic look at the sustainability of earnings, not a simple confirmation that the books follow accounting rules. It exists to separate the durable profit from the one-time, the personal, and the optimistic.

The QoE team starts with your EBITDA and works backward through every adjustment. They test revenue recognition first: services billed but not yet collected, income deferred or pulled forward, anything that makes a given year look better than the cash actually supports.

Then they move to your add-backs, line by line.

This is where unprepared sellers bleed value. The add-backs that get rejected are the predictable ones: owner compensation normalized too aggressively, continuing-education spending that looks like family travel, relatives on payroll with no documented role, and “one-time” legal fees that quietly recur across three years.

Each rejected add-back lowers the EBITDA the price is built on.

There’s a compounding danger most owners miss. When a buyer’s accountants catch one aggressive add-back, they don’t just remove that line.

They start discounting the credibility of your entire normalization, and the whole number gets a harder look. One sloppy add-back can cost you several legitimate ones.

So how do you defend against an audit run by the other side’s accountants? Not by running your own version of it and waving it around.

The right approach is a thorough pre-sale financial review on your side of the table, built around exactly the scrutiny the buyer’s accountants will apply, but done before any buyer ever sees your numbers.

When we prepare a practice for sale, that review is part of the work. It gives us months to clean up anything that would not survive a deep audit: questionable add-backs get supported or dropped, revenue-recognition quirks get fixed, inventory valuation gets squared away, and doctor productivity tracking gets tied to documented schedules.

By the time the buyer’s QoE team does their pass, the price-cutting findings they were hoping for have already been handled. In my experience that preparation is almost always worth at least one multiplier point of protected value, and sometimes a great deal more.

Add-backs: where being defensible beats being aggressive

It’s worth pausing on add-backs on their own, because they are the single most re-traded item in veterinary practice sales.

An add-back is a personal or one-time expense you add back to profit because the next owner won’t inherit it. Done right, normalization commonly raises the EBITDA a buyer prices against by a meaningful margin over the raw tax-return number.

Done carelessly, it hands the buyer a loaded weapon.

The test a buyer’s accountant applies is simple to state and hard to fake: is this expense genuinely non-recurring or genuinely personal, and can you prove it? Owner pay above what a hired medical director would cost is defensible, with market data behind it.

A spouse’s salary is defensible only if you can show the role and the market rate for it.

The add-backs that survive share one trait. They come with documentation: invoices, contracts, board minutes, a clear paper trail that an outside accountant can verify in an afternoon.

The ones that die are the ones supported by nothing but the owner’s word, and “trust me” has never once survived a Quality of Earnings audit.

This is the part owners cannot improvise at the closing table. Building a defensible add-back schedule is patient, documented work that has to happen before the practice goes to market, which is exactly why it belongs in preparation and not in the diligence scramble.

Doctor productivity and the concentration problem

Once the earnings are tested, the buyer turns to a different question: does this practice run without the seller, and is its revenue spread across enough sources to be durable?

They start with doctor productivity, measured as revenue and production per doctor. They want to see that the practice’s output does not depend overwhelmingly on one person, and the person they worry about most is you.

If you personally produce the majority of the practice’s revenue, the buyer is not buying a practice that runs without you. They are buying a job that ends the day you leave.

That dependence gets priced in hard, and it also reshapes the deal. A buyer staring at heavy owner production will protect themselves with lower cash at close, a longer required employment period, or a bigger earnout (part of the price paid later, only if the practice hits agreed performance targets after closing).

All three move risk off the buyer and onto you.

The broader version of this is concentration risk, and it is the quiet valuation-killer in veterinary diligence. Concentration shows up in several forms: too much revenue through one doctor, too much case flow from a single referral source, an outsized share from one large client or contract, or heavy reliance on one insurance or wellness-plan payer.

Each form reads to a buyer as fragility, and fragility gets discounted.

The fix is slow but reliable, which is the recurring theme of everything that survives diligence well. Bringing associates up to a real share of production, broadening the referral base, and reducing reliance on any single source all take 12 to 24 months to show up in the numbers a buyer can verify.

An associate hired the month before you go to market does nothing for your diligence story, because the buyer wants several quarters of sustained production before they will underwrite it.

There is a staffing dimension here too, and it has only gotten sharper. With the profession’s well-documented labor constraints — staffing shortages now rank among the top operational pressures owners report — a buyer reads a thin or fragile team as a real risk to the earnings they are paying for.

A practice that runs on one or two doctors with no retention agreements signals flight risk, and flight risk shows up in the terms.

Working capital: the six-figure surprise at the closing table

Here is the part of diligence that blindsides more owners than any other, because it is technical, it surfaces late, and almost nobody explains it before the letter of intent gets signed.

Most veterinary purchase agreements include a net working capital adjustment — the day-to-day operating capital a practice needs to run, meaning receivables and inventory minus what it owes in the short term. The buyer sets a target level, often called a “peg,” that you must leave in the practice at closing.

The mechanism is unforgiving and it runs both directions. As M&A advisors describe the standard structure, if the working capital you deliver at closing comes in below the agreed target, the purchase price is reduced dollar for dollar.

If it comes in above target, you are paid the difference.

The trap is in how the peg gets set. The target is usually built from the practice’s recent historical working capital, and a buyer has every incentive to set it high, because a higher target means more capital you have to leave behind.

From the seller’s side, as one M&A guide frames it, the lower the peg the better, since any excess at closing comes back to you as a positive adjustment.

I have seen owners lose well into six figures here on an otherwise excellent deal, purely because nobody negotiated the peg or tracked working capital in the run-up to closing. Inventory drawn down too far, receivables collected too aggressively in the final weeks, and suddenly you are short of target and writing money back at the table.

This is squarely an advisor’s job to manage. The peg gets negotiated, working capital gets monitored through the closing window, and the seller does not get surprised.

An owner trying to handle this alone, mid-diligence, against a buyer’s experienced deal team, is in a fight they did not know had started.

Legal diligence: contracts, leases, and the real estate question

While the accountants test the numbers, the buyer’s lawyers test everything that binds the practice together. Legal diligence is where structurally sound-looking deals sometimes stall, and the most common stumbling block is not exotic at all.

It is the lease.

If you rent your space, the buyer needs the lease to transfer to them cleanly, and that often requires your landlord’s consent. As Today’s Veterinary Business has noted in its coverage of closing a practice sale, a landlord can refuse to assign the lease, demand a personal guarantee from the new owner, or use the moment to impose less favorable terms, and any of those can delay a sale or force a price adjustment.

A short remaining lease term is its own problem. A buyer underwriting a long hold does not want to inherit a lease with 2 years left and an uncertain renewal, so lease length and renewal options get scrutinized closely.

Owners who also hold the real estate face a parallel set of questions about whether the building sells with the practice, gets leased back, or stays separate, each with different tax and value consequences.

Beyond the lease, the legal team works through every contract that could affect the practice’s value after closing. Vendor agreements, equipment leases, wellness-plan and lab contracts, software licenses, and any agreement with a change-of-control clause that could terminate or reprice when ownership shifts.

They are looking for anything that does not transfer cleanly or that hands a third party leverage over the new owner.

All of it eventually rolls into the representations and warranties in the purchase agreement — the factual statements you make about the practice, that the financials are accurate, taxes are paid, contracts are valid, and there are no hidden liabilities. If one of those statements later proves false, the buyer can claw back part of the price, usually from a holdback — a slice of the price the buyer keeps back temporarily to cover problems that surface afterward.

On larger deals, the parties increasingly bridge this risk with representations and warranties insurance, a policy that covers losses from a breach so the buyer does not have to chase the seller and the seller can walk away cleaner. As Holland & Knight notes, that product has become common in M&A involving highly regulated industries, and veterinary medicine, with its licensing and controlled-substance rules, qualifies.

The cleaner your reps can be, the smoother and cheaper that coverage gets, which is one more reason organized, accurate records pay off at the table.

Operational and compliance diligence: the records buyers expect

The last bucket is the one owners most often treat as an afterthought and buyers treat as a tell. Operational and compliance diligence is the buyer reading how the practice is actually run, and sloppy records here color how they see everything else.

The compliance review is methodical. Veterinary licenses and their good standing, DEA registration, controlled-substance logs and reconciliation, medical-record completeness, OSHA documentation, radiation-safety records, and employee classification — whether your team is properly designated as employees or contractors, which carries real tax and wage exposure if it is wrong.

A gap in any of these is not just a fine waiting to happen. It is a crack the buyer can widen into a price reduction or a fresh indemnity demand.

There’s a signal buried in all of this that owners underrate. When a buyer’s team asks for documents and you produce them quickly, completely, and well-organized, you are telling them the practice is well run, and well-run practices command full prices and smoother closings.

When the requests get met slowly, with gaps and “let me find that,” you are telling them the opposite, and they adjust both their price and their patience accordingly.

The fix is to assemble the data room before any buyer is invited in. A complete, indexed set of financials, contracts, productivity reports, and compliance records does two things at once.

It speeds the entire process, and it frames the practice as the kind of disciplined operation a buyer pays up for.

The seller-side preparation that protects the price

By now the pattern is obvious. Nearly every place a buyer can re-trade your price is a place you could have closed off in advance.

That is the entire logic of preparing for diligence instead of reacting to it.

This is also where a structured competitive process earns its keep. The methodology we use to sell practices is the Elite Selling System — we hand-select and vet every buyer who gets to bid on your practice, the way a doorman with a velvet rope lets in only the right people, and then we run a private competitive window inside that vetted group.

The reason that matters for diligence is leverage.

A single buyer doing diligence on a seller with no alternatives can re-trade almost at will, because the seller’s only choices are accept the lower number or blow up months of work and start over. A seller with other qualified bidders still interested has a real answer to a re-trade attempt: move on to the next buyer.

That credible alternative is often the only thing that keeps a diligence finding from becoming a price cut.

So the preparation is two-sided. On the readiness side, we build and document a defensible normalized EBITDA, run the pre-sale financial review that mirrors the buyer’s Quality of Earnings audit, reduce concentration, secure the lease and contracts, clean up compliance, and assemble the data room — all before a buyer is in the picture.

On the leverage side, we keep the process competitive so no single buyer controls the back half of the deal.

Done together, those two things change what diligence is. Instead of a hunt for reasons to pay you less, it becomes a confirmation of the story you already told.

That is the difference between the owner who keeps their number and the owner who takes the quiet phone call 6 weeks in.

What to do next

Most of what I’ve laid out here is the kind of thing I’d walk a vet through over dinner long before they ever sign a letter of intent. The offer gets the attention, but diligence is where the offer either holds or quietly erodes, and the work that protects it has to happen early.

If you’re inside the 1-to-2-year window before you sell, the highest-value moves are clear. Get a defensible normalized EBITDA documented and supported before any buyer enters the conversation.

Run the pre-sale financial review that finds and fixes what a buyer’s accountants would have used against you. Reduce your concentration, secure your lease, paper your key people, and clean up your compliance records while there is still time for it to register in the numbers a buyer can verify.

And do not let a single buyer take you into exclusivity and run diligence with no one else at the table. That is the setup where re-trades happen, because by the time you realize the number is drifting down, the other bidders have moved on and your leverage is gone.

Get a Free Practice Value Estimate →

We pull your numbers ourselves, build the normalized EBITDA properly, and run the pre-sale financial review that surfaces and fixes anything a buyer’s diligence team would have caught. Then we identify the right group of qualified buyers for your specific profile and run a competitive process that keeps your leverage intact straight through closing.

The estimate is free and there’s no obligation to engage further. The Transitions Elite engagement model is success-based, with no upfront fees and no retainer, so we only get paid when a deal closes and only out of the value our process protects and delivers.

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Further reading

These are the related TE resources I’d point any vet toward as they think about getting sale-ready. Each goes deep on a single piece of the decision.

• How to sell a veterinary practice — the full process from advisor engagement to closing, with diligence as one phase inside it.
• Veterinary practice EBITDA multiples — what practices actually sell for in 2026, by size and by sale process.
• How much private equity is paying for veterinary practices — the four components of a PE-backed offer and why the headline rarely equals the cash check.
• Veterinary practice consolidators directory — the verified directory of major PE-backed and strategic buyers operating in 2026.
• Our practice sale results — outcomes across the practices we’ve represented.
• About Transitions Elite — the team, the methodology, and the firm’s track record.

Frequently asked questions

What is due diligence when selling a veterinary practice?

Due diligence is the deep review a buyer runs after you sign the letter of intent, to confirm that everything you represented about your practice is actually true before money changes hands. A buyer’s team examines your financials and earnings quality, your add-back support, doctor productivity, client and revenue concentration, contracts and leases, real estate, staffing, and regulatory compliance.

The process typically runs 60 to 120 days. Its entire purpose is to find anything that justifies paying less than the letter of intent number, so the seller who walks in fully prepared protects the price they were promised.

What do buyers look for when buying a veterinary practice?

Buyers test whether the earnings are real and durable, and whether the practice runs without the seller. They scrutinize normalized EBITDA and the support behind every add-back, 3 to 5 years of revenue trends, doctor productivity per provider, how concentrated revenue is in one doctor or one referral source, the lease and real estate terms, staffing and key-person risk, and regulatory and medical-record compliance.

Anything that looks fragile, undocumented, or owner-dependent becomes a reason to lower the price or restructure the deal.

How long does due diligence take on a veterinary practice sale?

Most veterinary practice diligence runs 60 to 120 days from signed letter of intent to closing, with larger and PE-backed deals landing at the longer end because their review is deeper and the paperwork is heavier. The financial review usually moves first, followed by legal, real estate, and confirmatory work.

The single biggest cause of delay is a seller producing documents slowly or discovering problems mid-process that should have been cleaned up before going to market.

What is a Quality of Earnings audit and who pays for it?

A Quality of Earnings audit is the deep financial review the buyer’s accountants run before closing, to test whether your EBITDA holds up under scrutiny and how much of it is durable, recurring profit. The buyer commissions and pays for it.

It is not something the seller should commission on their own. The seller-side equivalent is a pre-sale financial review run by your advisor, built around exactly the scrutiny the buyer’s accountants will apply, but done months earlier so anything that would not survive a deep audit gets cleaned up before any buyer sees your numbers.

Why does a buyer lower the price after the letter of intent?

Lowering the price after the letter of intent is called a re-trade, and it happens when diligence surfaces something the buyer says changes the value: rejected add-backs, revenue that was billed but not collected, a doctor who produces most of the revenue, a lease that cannot transfer cleanly, or a compliance gap. A single bidder who knows the seller has no other options has every incentive to find such a finding.

The strongest protection is being prepared enough that there is nothing real to find, and keeping other qualified bidders engaged so walking away stays credible.

What is net working capital in a veterinary practice sale?

Net working capital is the day-to-day operating capital a practice needs to run, meaning receivables and inventory minus what it owes in the short term. Buyers set a target level, often called a peg, that the seller must leave in the practice at closing.

If you deliver less than the target, the purchase price is reduced dollar for dollar. If you deliver more, you are paid the difference.

Sellers who do not understand the peg can quietly lose six figures at the closing table on an otherwise strong deal.

What documents does a buyer request during veterinary practice diligence?

Expect a request list covering 3 to 5 years of financial statements and tax returns, a detailed general ledger, the add-back schedule with support, production reports by doctor, the appointment and fee schedules, accounts-receivable aging, inventory records, the building lease or real estate documents, employment and contractor agreements, vendor and equipment contracts, licenses and DEA registrations, controlled-substance logs, medical-record and OSHA compliance records, and any history of litigation or regulatory action. Producing these quickly and cleanly is one of the clearest signals a buyer reads about how well the practice is run.

How do I prepare my veterinary practice for due diligence?

Start 12 to 24 months before you go to market. Have an advisor build and document a defensible normalized EBITDA, run a pre-sale financial review that mirrors the buyer’s Quality of Earnings work, diversify doctor production so you are not the majority producer, secure your lease or clarify real estate, paper your key staff and clean up compliance records, and organize everything into one complete data room before any buyer is invited in.

The goal is that diligence confirms your story rather than unravels it.

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Sources

Industry M&A research and valuation data

1. Capstone Partners. “Pet Sector M&A Update — April 2026.” capstonepartners.com
2. Octus. “Private-Credit Exposure to Veterinary Rollups Shows Growing Dispersion — VSOs Under Increasing Pressure.” 2025. octus.com
3. EdgePoint. “Quality of Earnings.” edgepoint.com

Veterinary practice operations, sale process, and profession data

5. dvm360. “8 essential steps in a veterinary practice sale.” dvm360.com
6. dvm360. “A look under the hood of a corporate practice purchase.” dvm360.com
7. dvm360. “Common misconceptions when selling a veterinary practice.” dvm360.com
8. Today’s Veterinary Business. “Seal the Deal.” todaysveterinarybusiness.com
9. AVMA. “Just released: AVMA data and insights on the veterinary profession.” avma.org

Legal and transaction-structure analysis

10. Holland & Knight. “Representations and Warranties Insurance.” hklaw.com
11. Dechert LLP. “Healthcare Investments Flash Alert — Latest Developments.” 2025. dechert.com
12. Whiteford, Taylor & Preston LLP. “Net Working Capital & Purchase Price Adjustments In M&A Deals.” whitefordlaw.com
13. Womble Bond Dickinson. “Net Working Capital (NWC) in M&A: The Quiet Concept That Moves the Purchase Price.” womblebonddickinson.com