Seller Note in a Veterinary Practice Sale: 2026 Owner’s Guide

Key takeaways

• A seller note makes you the bank — you accept a promissory note for a portion of the purchase price and collect payments from the buyer over time, with interest, instead of receiving full cash at closing.
• Seller notes are subordinated to the bank — if the buyer defaults, the bank gets paid first from any liquidated assets, and you recover what’s left. That risk is real and is rarely priced in at the number buyers propose.
• SBA full standby means zero payments for up to 10 years — under rules effective June 2025, a seller note that counts toward the buyer’s equity injection must be on full standby for the life of the SBA loan, with no principal or interest until the SBA loan is retired.
• A seller note differs from an earnout — a note is a fixed debt obligation regardless of performance; an earnout pays only if defined targets are hit. Both are subordinated, but the note is generally lower-risk than an earnout.
• Competitive process is the best defense — running multiple qualified buyers against each other is the most reliable way to find who requires a seller note and who doesn’t, and to negotiate the note’s terms from a position of strength.

I sat with a vet over dinner a few months after she’d signed a letter of intent on her practice. She had done the math on the headline number and was satisfied.

Then, somewhere between the salads and the main course, she slid a sheet of paper across the table. “Can you tell me what this part is?” she asked, pointing to a line in the LOI term sheet labeled “Seller Note — $400,000.”

She hadn’t quite understood what she’d agreed to. She thought it was a payment schedule, like a closing installment.

What it actually was: she’d agreed to lend the buyer $400,000 of her own proceeds, at an interest rate lower than the bank’s, subordinated to the bank’s loan, with no security in the practice assets, and a clause that let the buyer defer payments if cash flow got tight.

That’s the scenario I want to help every vet avoid walking into. The seller note is a legitimate tool, and in the right deal at the right terms it serves a real purpose.

But it comes with risks that don’t always get explained before the LOI gets signed, and the risks sit almost entirely on the seller’s side of the table.

A seller note (also called a seller carryback or owner financing) is a promissory note the practice seller accepts from the buyer in lieu of cash for a portion of the purchase price. Instead of funding that slice through a bank, the buyer promises to pay the seller back over time, with interest.

On a $3 million practice, a 15 percent seller note is $450,000 you don’t receive at closing. You receive it in installments, over years, from a buyer who just took on significant debt to buy your practice.

This article covers how the seller note works in a veterinary practice sale in 2026, what subordination and standby really mean for your payments, the UCC security provisions you should demand, how notes compare to earnouts and rollover equity, and the tax angle under installment sale treatment. If you’re considering a sale and a seller note is on the table, read this before you respond to the LOI.

What a seller note actually is, in plain numbers

The mechanics are simple, even if the risk profile isn’t.

The buyer owes you the full agreed purchase price. At closing, the buyer pays a portion in cash (or via bank financing) and issues you a promissory note for the remainder.

The note specifies the principal balance, the interest rate, the repayment schedule, and the conditions under which payment can be paused or withheld.

Per Mahan Law’s veterinary practice financing analysis, seller notes typically cover 5 to 30 percent of the purchase price, depending on the size of the buyer’s down payment and the bank loan. A 10 to 20 percent note is the most common range.

On a $4 million transaction, that’s $400,000 to $800,000 that doesn’t land in your account on closing day.

Interest rates sit roughly 5 to 10 percent in current practice M&A deals, per Hadley Capital’s M&A seller note analysis. The rate tends to run 1 to 2 percentage points above the buyer’s bank note to compensate for the subordinated risk, per Mahan Law.

Buyers sometimes propose lower rates, around 3 to 4 percent; that’s a negotiating posture. Given where senior lending rates sit in 2026, a note below 6 percent doesn’t price the subordinated risk adequately.

Term lengths commonly run 5 to 10 years, aligned with the buyer’s bank financing, per Mahan Law. Some notes carry a balloon payment: the buyer makes interest-only payments for 5 years, then refinances the remaining balance in a lump sum.

Most do not carry prepayment penalties, which means a well-capitalized buyer can pay it off early, ending your risk sooner.

Why buyers ask for seller notes in 2026

Buyers propose seller notes for a few distinct reasons, and it matters which one is actually driving the request.

Financing gap. The most common reason. The bank will lend up to a certain percentage of the purchase price.

The buyer doesn’t have enough cash to cover the remainder. The seller note bridges the gap.

Banks, including SBA lenders, sometimes require the seller note specifically — they treat it as evidence that the seller believes in the buyer’s ability to succeed. This is not a red flag; it’s standard practice in SBA-backed practice acquisitions.

Valuation gap. Buyer and seller can’t agree on the right number. The seller wants $5 million; the buyer’s bank will underwrite $4.5 million.

A $500,000 seller note lets both sides claim they got their number. Structurally, what it means is that the seller is betting $500,000 of their own money on the practice hitting the buyer’s underwritten projections.

Leverage for the buyer. Some buyers, particularly individual buyers in a solo acquisition, propose seller notes not because they have to but because it stretches their cash further. This is where terms matter most: if the seller note isn’t secured, isn’t personally guaranteed, and carries a weak interest rate, the seller gets a worse deal than they could have negotiated with better representation.

PE deal-structure filler. In PE-backed consolidator deals, a seller note occasionally appears as part of the overall package, subordinated to all senior debt. The seller receives no payments until the PE sponsor’s lenders are satisfied.

Understanding where a PE buyer’s lender stack sits relative to your note is essential before signing anything.

The most reliable diagnostic is a competitive process. When 4 to 6 qualified buyers are all looking at the same practice, the ones who need seller notes reveal themselves quickly.

Those who don’t need notes and still offer competitive prices reveal themselves just as fast. We get into how private equity structures its offers in a separate piece; the short version is that the mix of cash, earnout, rollover equity, and seller notes looks very different depending on the buyer type and the leverage available to the seller.

Subordination: why the bank gets paid and you don’t (if things go wrong)

This is the part of the seller note that deserves the most attention, and the part most often glossed over in the term sheet.

Subordination means that your right to repayment on the seller note ranks below the bank’s or SBA lender’s right to repayment. If the buyer’s practice generates insufficient cash flow and the buyer defaults, the lender moves first.

Assets are liquidated. The lender takes what it’s owed.

You collect from what remains.

In a healthy acquisition, this rarely matters — the practice generates cash, the buyer pays everyone, and you get your installments. But a veterinary practice that hits a wall after closing (lost key associates, integration challenges, a revenue dip in year two) can face real cash flow stress.

The bank has covenants and protections. Your seller note doesn’t.

Per Hadley Capital’s seller note analysis, most seller notes are unsecured in the absence of explicit negotiation — meaning if the buyer defaults and the bank’s security interest covers most of the practice’s assets, there may be nothing left for you to claim. This is the “becoming the bank with none of the bank’s protections” risk that sellers walk into when they haven’t had the terms reviewed carefully.

The good news is that subordination doesn’t have to mean unprotected. A properly structured seller note includes a UCC security interest — a filing under Article 9 of the Uniform Commercial Code that gives you a perfected lien on specified business assets.

That lien is junior to the bank’s lien, but it’s senior to future unsecured creditors. Per the American Bar Association’s UCC default analysis, a perfected secured creditor has defined rights to the collateral after default: the right to repossess, to force a sale, and to be paid ahead of unsecured claimants.

An unperfected seller note gets none of that.

Demand the UCC filing. It should be part of every seller note in a practice acquisition, and its absence is a negotiating failure, not an industry norm.

The SBA standby agreement: when 10 years of zero payments is the deal

In SBA-financed acquisitions — which cover a significant share of individual-buyer and associate-buyout transactions in vet practice M&A — the seller note is governed by SBA requirements that change the payment picture substantially.

Under SBA SOP 50 10 8, effective June 1, 2025, a seller note that the buyer uses to satisfy part of the required equity injection must be on full standby for the life of the SBA loan, per the SBA’s own Standard Operating Procedure document and Starfield & Smith Attorneys at Law’s 2025 analysis. Full standby means no principal, no interest — zero payments from the buyer — until the SBA loan is paid in full. SBA 7(a) loans for practice acquisitions commonly run 10 years.

What that means in practice: if you accept a $500,000 seller note as part of an SBA-financed buyout, and the note is placed on full standby, you receive nothing on that note for up to a decade. The $500,000 sits on paper, accruing interest, and you receive a lump sum only when the SBA loan is retired.

You have no cash flow from the note in the interim.

The SBA formalizes this via SBA Form 155, the Standby Creditor’s Agreement. Per Starfield & Smith’s best practices analysis, the Form 155 must be circulated to the seller and seller’s counsel early in the closing process — this is a document that is often negotiated and cannot be a closing-day surprise.

The agreement specifies the standby terms, the subordination provisions, and the conditions under which the bank can block any payment on your note even after the standby period ends.

There are two categories of seller note in an SBA deal. A note on full standby counts toward the buyer’s equity injection and carries zero payments for the SBA loan term.

A note NOT counting toward equity injection can allow payments during the loan term — but only if the buyer isn’t in default and cash flow is adequate, per Starfield & Smith. Many sellers don’t realize the distinction exists and default to the full-standby structure without knowing what they’re giving up.

If a seller note is being proposed in an SBA-financed deal, the right conversation to have is whether the note is actually needed for the equity injection, or whether it can be structured to permit partial payments during the loan term. Your attorney needs to be in that conversation before the LOI is signed.

Comparing the three deferred-consideration structures in 2026

Seller notes, earnouts, and rollover equity are the three main instruments buyers use to defer part of the consideration — and sellers confuse them constantly. They solve different problems and carry different risk profiles.

Structure	Obligation type	Payment trigger	Subordinated?	Typical size
Seller note	Fixed debt — owed regardless of performance	Scheduled installments per note terms	Yes — junior to senior lender	5 to 30 percent of purchase price
Earnout	Contingent — owed only if performance targets are hit	Defined post-closing milestones (EBITDA, revenue, client retention)	Often yes — can be blocked during senior debt default	10 to 25 percent of purchase price
Rollover equity	Equity — not debt	No fixed schedule; realized at a future liquidity event	N/A — equity, not debt	10 to 30 percent in PE deals

The seller note is the most predictable of the three. The buyer owes you the money on a schedule, unconditionally, as long as they’re not in default to the senior lender.

An earnout is part of the sale price paid later, only if the practice hits agreed performance targets after closing. If those targets aren’t hit — even for reasons outside your control — the earnout doesn’t pay.

We cover how earnouts and rollover equity work in their own piece; the short version is that rollover equity has the highest potential upside and the highest uncertainty, while the seller note sits closest to a guaranteed cash outcome.

The risk that seller notes share with earnouts: subordination. Per PitchBook’s analysis of PE seller financing, even an earnout obligation can be blocked by senior lenders if the acquired company is in covenant default.

The seller has “earned” the payment by the math, but the senior debt prevents it from moving. The same subordination dynamic applies to seller notes in PE-backed deals.

Understand the lender stack before you accept any deferred consideration.

The protections every seller note should include

Most of the risk in a seller note is negotiable. The terms that buyers propose first are rarely the ones a seller should accept.

Here is what a well-structured seller note includes, and why each element matters.

Personal guarantee from the buyer. The note should be guaranteed by the buyer personally, not just by the practice entity. If the practice entity fails, a personal guarantee gives you a claim against the buyer’s other assets.

Without it, you’re an unsecured creditor of an entity that may have nothing left.

Perfected UCC security interest. File a UCC-1 financing statement with the applicable state secretary of state within 20 days of closing. The filing perfects your security interest in the practice’s assets, establishing your priority position over future unsecured creditors and judgment creditors, per the CSC UCC guide.

Junior to the bank’s lien, yes — but not invisible.

Default and cure provisions. The promissory note must define what constitutes a default (missed payments, practice sale without your consent, buyer insolvency) and give the buyer a cure period, typically 30 days, to remedy a missed payment before acceleration. Per attorney Aaron Hall’s seller note analysis, notes without clear default provisions create ambiguity that delays enforcement and can trap sellers in prolonged disputes.

Adequate stated interest. The IRS requires seller notes to carry interest at or above the applicable federal rate (AFR) — the minimum rate the IRS publishes monthly. If the note carries inadequate stated interest, the IRS will impute interest by recharacterizing some principal payments as interest, turning a capital-gain dollar into an ordinary-income dollar.

Per IRS Publication 537, interest on seller notes is taxable as ordinary income each year regardless of how the note is structured; make sure the rate is stated plainly and at or above the AFR.

Balloon refinance obligation. If the note runs longer than 5 years, consider including a provision that requires the buyer to refinance the remaining balance within a defined window, forcing a lump-sum payoff before you are waiting 10 years for the full amount.

The tax picture: installment sale treatment and what it means for your note

The seller note changes your tax timeline, not your total tax bill — and in some situations, that’s a benefit worth structuring carefully.

When you accept a seller note, the transaction qualifies as an installment sale under IRS Publication 537. Rather than recognizing all the gain in the year of sale, you report a proportional share of the gain on each principal payment you receive.

The installment sale method spreads the gain recognition across the note’s term.

On a $4 million practice with a $600,000 adjusted basis and a $500,000 seller note, you don’t report the gain on the full $4 million in year one. You report the gain attributable to the cash received at closing and then recognize a proportional slice of the remaining gain as each note payment comes in.

For sellers in high-income years, this deferral can lower the effective rate on the deferred portion. For sellers who expect to be in a lower bracket in retirement years when note payments arrive, the benefit can be meaningful.

But it isn’t a guarantee. Installment sale treatment doesn’t work for inventory or depreciation recapture, which must be reported in the year of sale regardless of when the cash arrives.

Your CPA needs to model this with your actual numbers before closing.

One critical point: the interest you receive on the note is ordinary income every year. It doesn’t get capital-gains treatment.

That’s the tradeoff for the deferred gain recognition. If the interest compounds for 10 years at 7 percent on a $400,000 note, the interest alone adds up to significant ordinary income over the standby period.

For tax planning that goes beyond the note structure, our guide to tax consequences of selling a veterinary practice covers the full picture: EBITDA allocation, goodwill treatment, the C corporation trap, and how to approach the after-tax check as the real number that matters. The tax tail should never wag the deal dog — but it absolutely should inform how you negotiate the note’s terms and size.

Why competitive process is the most powerful negotiating lever on seller note terms

Here is the dynamic I’ve watched play out across the deals we’ve closed over the past four-plus years. A seller who negotiated directly with one buyer, without running a process, tends to accept the seller note as a given.

There’s no reference point for what’s achievable. The buyer knows the seller wants to close, and the seller note terms drift toward what’s favorable to the buyer: low interest, no UCC filing, no personal guarantee, maybe a standby period tucked into the fine print.

A seller who has run a competitive process with 4 to 6 qualified buyers knows something entirely different. They’ve seen which buyers need a note and which don’t.

They’ve seen which buyers offer higher cash at closing as a competitive response. They’ve negotiated from the position of a seller with options, not from the position of a seller who needs this particular deal to work.

That’s the core of what the Elite Selling System does. 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, then run a private competitive bidding window inside that vetted group.

The leverage that creates doesn’t just move the multiple on the headline number. It changes the deal structure entirely.

Sellers who run competitive processes routinely negotiate better note terms, better personal guarantee provisions, and in many cases, no seller note at all, because multiple buyers competing for the same practice don’t leave seller-note-as-financing-gap on the table if they can win without it.

The arithmetic is straightforward. A $400,000 seller note at 6 percent on a 10-year term returns roughly $533,000 if everything goes perfectly.

That same $400,000 in cash at closing, invested conservatively, returns a comparable number without the default risk, without the subordination, and without the decade of waiting. The only time a seller note makes clear mathematical sense for the seller is when the note’s premium rate meaningfully compensates for the risk, or when it bridges a valuation gap that no other structure could close.

For a deeper look at who buys practices and how their deal structures differ, see who to sell your veterinary practice to. For the full picture on how veterinary practice consolidators approach deal construction in 2026, including where seller notes fit in PE-backed structures, we cover that cluster separately.

What to do next

The most useful thing you can do before any discussion about a seller note is understand what your practice is actually worth and what range of deal structures you might realistically receive. That baseline is what separates a seller who accepts a note because they didn’t know they had leverage from a seller who accepts a note because they chose to as part of an optimal overall deal.

We pull your numbers, build a defensible normalized EBITDA, and walk you through how different buyers typically approach the mix of cash, deferred consideration, and notes in 2026. If a seller note is going to be part of your deal, you should know its likely size, likely terms, and whether running a competitive process could replace it with something better before you ever see an LOI.

The first step is a free, confidential practice value estimate — no obligation attached.

The estimate is free and there’s no obligation to go further. The Transitions Elite engagement model is success-based, with no upfront fees and no retainer.

We only get paid when a deal closes, and only out of the value our process delivers above what the seller would have gotten on their own.

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Frequently asked questions

What is a seller note in a veterinary practice sale?

A seller note is a promissory note the practice seller accepts from the buyer in lieu of cash for a portion of the purchase price. The buyer pays the seller back over time, with interest, rather than funding that portion through a bank.

Seller notes in veterinary practice sales typically cover 5 to 30 percent of the purchase price, carry interest rates of roughly 5 to 10 percent, and run on terms aligned with the buyer’s bank financing, commonly 5 to 10 years.

Why do buyers ask for seller notes in veterinary practice acquisitions in 2026?

Buyers ask for seller notes for two reasons. First, as a financing tool when a bank loan does not cover the full purchase price and the buyer needs to close the gap without bringing more cash.

Second, as a valuation bridge when buyer and seller disagree on price and the seller note lets the seller receive additional consideration if the practice performs. Banks and SBA lenders may also require a seller note as proof the seller has confidence in the buyer’s ability to succeed.

What does subordination mean for a seller note in a veterinary practice sale?

Subordination means the seller’s right to repayment ranks below the bank’s or SBA lender’s right. If the buyer defaults and assets are liquidated, the senior lender is paid first.

The seller note holder is paid from whatever remains. In a practice that fails with significant debt, the seller may recover little or nothing on the note.

Subordination is non-negotiable when an SBA loan funds part of the acquisition.

What is a standby agreement and does it affect seller note payments?

A standby agreement is a contract, typically SBA Form 155, where the seller agrees not to accept any principal or interest payments on the seller note while the SBA loan is active. Under SBA SOP 50 10 8, effective June 2025, a seller note that counts toward the buyer’s required equity injection must be on full standby for the entire life of the SBA loan, commonly 10 years, with all principal and accrued interest paid in a lump sum only after the SBA loan is retired.

How is a seller note taxed in a veterinary practice sale?

A seller note triggers installment sale tax treatment under IRS Publication 537. Rather than recognizing the entire gain in the year of sale, the seller reports a proportional share of the gain on each principal payment received, spread across the note’s term.

Interest payments are ordinary income each year. A CPA familiar with practice M&A should structure the note to include adequate stated interest at or above the applicable federal rate to avoid the IRS recharacterizing principal as imputed interest.

What is the difference between a seller note and an earnout in a veterinary practice deal?

A seller note is a fixed debt obligation: the buyer owes the seller a defined amount on a defined schedule, regardless of post-closing practice performance. An earnout is contingent: the seller receives additional payment only if the practice hits agreed performance targets after closing.

Seller notes are generally considered lower-risk than earnouts because the obligation is unconditional, though both are subordinated to senior lenders and can be blocked during an SBA loan standby period.

What protections should a seller demand when accepting a seller note in a veterinary practice sale?

Sellers should demand a personal guarantee from the buyer, a perfected UCC security interest in the practice’s assets to establish priority over future unsecured creditors, a clear default and cure provision in the promissory note, and an interest rate that compensates for the subordinated risk, typically 6 to 10 percent. Sellers should also insist on a copy of all bank and SBA loan documents so they understand the priority structure before the note is signed.

Can a PE-backed buyer require a seller note in a veterinary practice acquisition?

Yes. PE-backed groups sometimes propose seller notes as part of the deal structure, particularly when the seller note serves as a bridge between the buyer’s bid price and the financing available from their lender syndicate.

In PE deals, the seller note is typically subordinated to all senior debt. The seller receives no payments while senior debt remains outstanding.

Running a competitive process with multiple qualified buyers is the most reliable way to identify whether a seller note is actually necessary or simply a negotiating lever.

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Sources

Industry M&A research and deal structure

1. PitchBook. “PE sellers use earnouts, seller’s notes to close deals.” pitchbook.com
2. Hadley Capital. “Seller Notes: What They Are and How They Work.” hadleycapital.com
3. Founder M&A. “Earn-Outs vs. Rolled Equity vs. Seller Notes: M&A Deal Structures Explained.” founderma.com

Veterinary practice law and practice transition

4. Mahan Law, PLLC. “Seller Financing in Veterinary Practice Sales.” mahanlaw.com
5. Mahan Law, PLLC. “Financing Options for Veterinary Practice Buyers: Legal Implications.” mahanlaw.com

SBA lending rules and standby agreements

6. SBA. SOP 50 10 8, effective June 1, 2025 ? Change-of-Ownership Lending and Equity Injection Requirements. sba.gov
7. SBA. Form 155: Standby Creditor’s Agreement. sba.gov
8. Starfield & Smith Attorneys at Law. “Best Practices: Seller Notes and Standby Agreements.” starfieldsmith.com
9. Starfield & Smith Attorneys at Law. “Best Practices: SBA Issues SOP 50 10 8.” starfieldsmith.com
10. Starfield & Smith Attorneys at Law. “Best Practices: A Review of Equity Injection Requirements Under SOP 50 10 8.” starfieldsmith.com

Legal ? UCC and default

11. American Bar Association. “Remedies and Enforcement upon Default under the UCC.” americanbar.org
12. Aaron Hall, Attorney. “Promissory Notes With Confession of Judgment Clauses.” aaronhall.com

Tax ? installment sales and earnout treatment

13. IRS. Publication 537: Installment Sales (2025 edition). irs.gov
14. IRS. Topic No. 705: Installment Sales. irs.gov
15. Morse Law. “Taxation of Earnout Payments in M&A Transactions.” morse.law