Most HVAC owners think of owner financing as a concession — something you do when a buyer can't get a bank loan. PE thinks of it differently.
To a PE buyer, a seller carry note is a signal. It says you believe in the business enough to stay on the hook for a portion of the deal — that you're not taking the money and running because you think the business will fall apart under new ownership. That signal has real economic value. Used strategically, a seller note can increase your total exit price by 10–20% while giving you ongoing income during the note period.
Used wrong, it's an unsecured loan to a stranger. The difference is entirely in how you structure it and when you agree to it. This post walks through both sides — when a seller note adds value, what terms to fight for, and when to say no.
What Is Owner Financing in an HVAC Business Sale?
Owner financing — also called a seller carry note or seller note — is a structure where you, the seller, hold a promissory note for a portion of the purchase price. Instead of receiving 100% of the deal value at close, you receive, say, 80% in cash and hold a note for the remaining 20%, paid back over 3–7 years with interest.
The note is a real financial instrument with enforceable terms — principal balance, interest rate (typically 6–10%), payment schedule, and security provisions. You are, in effect, lending a portion of the purchase price to the buyer.
Who uses seller notes in HVAC deals?
PE buyers on tighter leverage ratios — a seller note reduces the equity check and senior debt required, making deals feasible at higher headline prices.
SBA-backed deals — the SBA often requires a seller note of 10% or more as a condition of approval, signaling that the seller has confidence in the business continuing to perform.
Management buyouts (MBOs) — the management team almost never has full acquisition capital, making seller financing structurally necessary in most MBO deals.
The math comparison
Cash-only deal
$8.5M
15% discount because buyer can't fully fund
Full price + 20% seller note
$10M
$8M at close + $2M note at 7% over 5 years = ~$2.4M total inflow
The full-price seller note deal nets approximately $400K more in total proceeds on this example.
How Owner Financing Affects Valuation
The counterintuitive truth: offering to carry a seller note often increases the headline price you can negotiate — not decreases it. Here's why.
From a buyer's perspective, a seller note does two things: it reduces the upfront capital required and it aligns incentives (you can't take the money and disappear). Both of those reduce perceived risk. Lower perceived risk = willingness to pay a higher multiple.
Worked example: $10M cash vs. $11.5M with 20% seller note
Assume your business generates $2M in EBITDA. A PE buyer offers two structures:
Option A: $10M cash
- 5.0x EBITDA multiple
- $10M wired at close
- Total proceeds: $10M
Option B: $11.5M + 20% note
- 5.75x EBITDA multiple
- $9.2M at close
- $2.3M note at 7% over 5 years
- Total proceeds: ~$11.8M
Option B requires you to accept deferred payment on $2.3M. But the total inflow — $9.2M cash now + $2.3M principal + ~$420K in interest over 5 years — is approximately $11.9M vs. $10M all-in. That's roughly 19% more in total proceeds.
This math works because the buyer can pay a higher EBITDA multiple when 20% is seller-financed vs. all-bank or all-equity. The seller note effectively stretches the deal economics for both sides.
For PE buyers running roll-up strategies, a seller carry note also reduces their equity check on each acquisition, allowing them to deploy capital across more deals. A seller who understands this dynamic can use it as negotiating leverage: “I'm willing to carry 20% because I believe in the business — but I want full market price, not a discount.”
Key Terms to Negotiate in a Seller Note
The headline number matters. The terms matter more. A $2.3M seller note with poor terms is a different instrument than a $2.3M seller note with strong protections. Before you agree to carry a note, understand and negotiate each of these:
Interest rate (market: 6–10%)
Most seller notes in HVAC deals price at prime + 1.5–3%, or a fixed rate in the 6–10% range. Don't accept below-market rates in exchange for a higher headline number — the present value calculation will show you're actually giving back part of the premium through subsidized interest.
Term length (3–7 years)
Buyers prefer longer terms; sellers prefer shorter. 5 years is the most common HVAC seller note term. Push for 3–4 years if you can — less time exposed to business performance risk, faster capital recovery.
Subordination clause — read this carefully
PE buyers often require seller notes to be subordinated to senior lenders (banks, credit facilities). This means if the business defaults, the bank gets paid before you do. Understand exactly where your note sits in the capital stack before signing the LOI. A subordinated note on a highly-leveraged acquisition is a much riskier instrument than a senior note.
Prepayment rights
Negotiate the right to receive prepayment without penalty if the buyer refinances or the business is sold during the note period. A change of control or liquidity event should trigger full note repayment.
Security: what happens if the buyer defaults
An unsecured seller note is a bet. Push for a UCC lien on business assets, a personal guarantee from the principal buyer, and/or a security interest in the business itself. A well-secured note gives you recourse. An unsecured note gives you a lawsuit.
Acceleration clause
Include language that accelerates the full balance due on missed payments or a change of control. This gives you leverage if the buyer misses a payment and prevents the note from dragging on past its term if the business is resold.
The seller note truth
A seller note is not a fallback — it's a deal tool. Used right, it adds 10–20% to your headline number and keeps cash flowing into retirement. Used wrong, it's an unsecured loan to a stranger. The difference is in the terms.
When Owner Financing Makes Sense (and When It Doesn't)
When it makes sense
- ✓You want a higher headline price and are comfortable with the buyer's ability to repay
- ✓It's a management buyout or SBA deal where a note is structurally required
- ✓You want ongoing income during your retirement transition period
- ✓The note has strong security terms and the buyer has demonstrable financial strength
When it doesn't
- ✗You need all cash at close for estate planning, tax, or personal liquidity reasons
- ✗The buyer has weak financials — don't accept a note from a buyer you wouldn't lend $2M to independently
- ✗You're accepting a note in lieu of earnout protection on an already-discounted price
- ✗The note is heavily subordinated and the deal has high senior debt leverage
The framing matters: seller financing is a negotiating tool, not a compromise. Before you agree to any seller note, confirm that the headline price with the note is actually better than a clean cash deal at a lower price — net present value after tax, not just gross proceeds. An M&A advisor can model this for you in about 30 minutes. That 30-minute model has saved sellers from making decisions that cost them hundreds of thousands of dollars.
What Buyers Will Ask Before Agreeing to a Seller Note
If you're proposing a seller note as part of the deal structure, expect the buyer to perform additional diligence — because they're assessing not just whether to buy the business, but whether the business will generate enough cash flow to service the note. Here's what they'll want:
CIM section on working capital needs
Buyers will model how much working capital the business requires to operate, because that number competes with note payments for available cash flow. A business with high seasonal working capital requirements (e.g., heavy equipment financing in peak install season) needs to demonstrate it can service both.
3 years of financial statements
The buyer is underwriting the note against the business's historical ability to generate free cash flow. Inconsistent financials or large non-recurring revenue items will make a buyer uncomfortable lending you more money via a seller note.
QoE report showing normalized EBITDA sustainability
A quality of earnings report that confirms your normalized EBITDA is reliable — not inflated by one-time revenue events — gives the buyer confidence that the note is serviceable. If your QoE shows volatile or one-time-heavy earnings, expect more scrutiny on the seller note terms.
Post-close transition plan
Buyers want to know you'll cooperate with the transition even after close. A seller who takes their note and disappears creates real operational risk. Expect requests for a documented transition plan and potentially a consulting agreement that overlaps with the note period. Review the exit checklist to have these materials ready before diligence starts.
The practical takeaway: the more prepared your financials, the easier it is to justify both the headline price and the seller note. Buyers are more willing to accept seller financing — and pay a premium for it — when the underlying financial story is clean and consistent. This is exactly what a QoE process is designed to produce.
Preparing to sell?
Before any deal structure conversation — seller note or otherwise — you need a baseline number. The PE Readiness Score in our free calculator shows exactly how PE buyers will evaluate your business and what EBITDA multiple range to expect — so you're negotiating from a position of knowledge, not guesswork.
Frequently Asked Questions
What percentage of the sale price is typically seller-financed?
10–30% is the standard range in HVAC PE deals. Most buyers want the seller to have skin in the game — it signals confidence in the business — but above 30% starts to raise buyer-risk flags. If a buyer is asking you to carry more than 30%, it usually means they can't get enough senior debt financing, which is itself a warning sign about the deal structure.
Is a seller note taxable?
Yes. When you carry a seller note, the IRS treats the proceeds as an installment sale under IRC Section 453. You recognize gain as you receive principal payments rather than all at once at close — which can spread your tax liability over the note term. The interest income is also taxable annually as ordinary income. This has meaningful tax planning implications, and the rules are nuanced. Always consult a CPA who has experience with installment sales before agreeing to seller note terms.
Can I negotiate a seller note with PE buyers?
Yes — and many PE buyers actually prefer it. A seller note reduces their equity check, signals that you believe in the business's post-close performance, and can improve deal feasibility when senior debt coverage ratios are tight. PE platforms running roll-up strategies frequently structure deals with 10–20% seller carry as a standard feature, not an exception. The key is negotiating favorable terms: interest rate, term length, security interest, and prepayment rights.
OffRamp is a free valuation tool for HVAC business owners. We don't sell your information, represent buyers, or work on commission. The calculator and reports are educational tools — always consult a licensed M&A advisor before entering a sale process.