What Is My HVAC Business Worth? The Real Formula Buyers Use (2026)

Ask three people what your HVAC business is worth and you’ll get three answers. A broker who wants the listing. A buddy who sold his shop in 2019. A number in your own head you’ve never tested. Usually they’re all wrong, and sometimes by a lot.

Here’s the actual math buyers use. No mystery, no MBA required.

The one formula behind every deal

Almost every small-business sale comes down to one line:

Value = adjusted earnings × a multiple.

That’s it. The whole game is (1) figuring out your real earnings, and (2) figuring out the multiple a buyer will pay for them. Everything else — recurring revenue, your books, how much the place leans on you — is really just an argument about whether your multiple should be higher or lower.

So let’s take the two pieces in turn.

Step 1: Your real earnings (SDE vs. EBITDA)

The profit on your tax return is not the number buyers use. They rebuild it to see the true earning power of the business. Which version they use depends on your size.

SDE — Seller’s Discretionary Earnings. Used for smaller, owner-operated shops (roughly under $1M in adjusted earnings). It’s your net profit, plus your owner’s salary, plus the personal perks running through the business, plus one-time costs. The idea: show the total dollars one working owner takes out of the business.

Adjusted EBITDA. Used as you get bigger. Same idea, but instead of adding all the owner’s pay back, you normalize it to what it would cost to hire a manager to do the owner’s job — often around $150K. That’s because a buyer at this size will run the shop with hired management, not sweat equity.

The bridge from one to the other is just the owner’s seat: EBITDA ≈ SDE − a market manager’s salary.

Add-backs: the part owners leave on the table

The adjustments that lift your profit to SDE or EBITDA are called add-backs, and missing them is the most common way owners under-price their own business. The defensible categories:

• Owner compensation above (or below) a market wage.
• Personal / discretionary spend run through the business — the truck that’s really personal, travel, the phone plans.
• One-time, non-recurring costs — a lawsuit, a software migration, storm damage.
• Related-party rent above or below market.

Every add-back has to be documented, because a serious buyer will test all of them in diligence. An add-back you can’t prove isn’t an add-back — it’s a red flag. (We go deep on this in 5 add-backs HVAC owners miss.)

Step 2: The multiple

Now the multiple. Here are the ranges buyers actually pay in HVAC, as of 2026:

Adjusted earnings	Basis	Typical multiple
Under ~$250K	SDE	~1.7–2.5×
~$250K–$500K	SDE	~2.0–2.9×
~$500K–$1M	SDE	~2.4–3.4×
~$1M–$3M	EBITDA	~5.5–7.5×
~$3M–$5M	EBITDA	~6.5–8.5×
~$5M–$10M	EBITDA	~8.0–10.5×

Two things jump out. First, the multiple climbs as you get bigger — that’s the “size premium,” and it’s why a roll-up will pay more for a $5M shop than five $1M shops. Second, even the biggest platform deals (Blackstone has paid around 18× for a large HVAC/plumbing/electrical platform) live at the far end of this same ladder. You’re on the ladder; the only question is which rung.

What actually moves your multiple

Within those bands, the same handful of factors decide whether you land at the bottom or the top:

• Recurring revenue. Maintenance agreements and memberships are the single biggest lever. Cross ~60% recurring and you’re in premium-multiple territory, because the buyer is purchasing predictable cash flow, not a coin flip.
• Owner independence. If the business needs you — your relationships, your pricing instinct, your hands — it’s riskier for a buyer, and owner-dependent shops sell for 30–50% less. Build a business that runs without you in the truck and the discount disappears.
• Clean financials. Roughly half of deals die in diligence when the books don’t hold up. Clean, current, defensible numbers don’t just raise your multiple — they keep the deal alive at all.
• Growth, customer mix, and technician stability round it out.

We break all seven of these down, with weights, in the 7 things that decide what your HVAC business sells for.

A worked example

Say your tax return shows $180K in net profit. Let’s rebuild it:

• Net profit: $180,000
• Add back owner’s salary: +$120,000
• Add back personal vehicle + phone + travel: +$22,000
• Add back a one-time legal settlement: +$15,000
• SDE = $337,000

At that size you’re on SDE. With clean books and ~55% recurring revenue, you’re near the top of the band — call it 2.8×:

$337,000 × 2.8 = ~$944,000

Now look what happens if the books are messy and the business runs entirely on you. The buyer drops to 2.1× and haircuts your shaky add-backs back to, say, $300K of SDE:

$300,000 × 2.1 = ~$630,000

Same trucks. Same revenue. A $300K+ swing — decided entirely by recurring revenue, owner-dependence, and whether your numbers hold up. That gap is the whole reason to know your number early and build it on purpose.

Why this matters right now

Private equity is buying up HVAC shops at a record pace — PE-backed add-on deals jumped sharply in 2025, and platforms now account for a large share of all HVAC M&A. These buyers walk into the room knowing your numbers better than you do. The owners who get top dollar aren’t lucky; they did the math two years early and fixed what was dragging the multiple down.

You don’t get a do-over on your exit. Knowing your number is the first move.

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