In our Q2 market pulse, we flagged a change we were seeing on nearly every initial buyer call: the first substantive question was no longer about EBITDA multiple. It was about revenue mix, specifically how much of the business is recurring versus project-based. We said we would spend more time on that in Q3, because the gap between a project-heavy business and a recurring-revenue business in today's market is wider than most owners think. This is where we start.
Ask most owners what their business is worth and they start with the top line. Ask a buyer, and the first thing they do is take that top line apart. Not all revenue is valued the same. The revenue that shows up because you won a bid last quarter is worth far less than the revenue that shows up whether you win anything new or not.
That distinction, project revenue versus recurring revenue, is one of the biggest levers on your multiple. And it is one of the few levers you can actually move in the years before a sale.
Why Buyers Discount Project Revenue
Project revenue is real. It pays the bills, funds the payroll, and builds the reputation that gets you the next job. But from a buyer's seat, it carries a problem: it resets to zero every year.
A $15M mechanical contractor with a great backlog still has to go re-win most of that $15M next year. The relationships are strong, the win rate is good, the pipeline looks healthy. But the buyer is underwriting a business that has to keep proving itself every twelve months to stay where it is. That is a business with no floor.
So the buyer discounts it. They model the revenue as lumpy, dependent on estimating accuracy, exposed to bid competition, and sensitive to the construction cycle. They ask what happens in a down market when new work dries up. And because that revenue is tied to specific projects, much of it is also tied to the owner's specific relationships, which is a separate risk they price in on top.
None of this means project work is bad. It means project work, on its own, gets valued like project work.
Why Recurring Revenue Gets Paid For
Recurring revenue is a different asset. It is the revenue that exists at the start of the year before anyone sells anything new. Service agreements. Preventive maintenance contracts. Monitoring and managed services on controls systems. Ongoing performance contracts. The revenue that renews.
Buyers pay up for it because it answers the question they care about most: what does this business look like the day after the owner leaves, in a market that is not cooperating? Recurring revenue gives them a floor. It is predictable, it is contractually documented, and it is far less dependent on any one person continuing to win work.
That predictability changes the underwriting. A dollar of contracted service revenue is modeled with confidence. A dollar of next year's hoped-for project revenue is modeled with a discount. When a buyer can point to a recurring base that covers a meaningful share of overhead before the first bid goes out, the entire risk profile of the business improves, and the multiple moves with it.
This is why two contractors with the same EBITDA can trade at very different numbers. The one with a real service book is selling durability. The other is selling a very good year.
The Difference Between "We Do Service" and a Service Business
Here is where a lot of owners overestimate where they stand.
Almost every contractor does some service. You install a system, and you keep an eye on it. You have long-standing customers who call you first. You would describe a chunk of your revenue as recurring because the same names come back year after year.
Buyers draw the line in a much more specific place. What they are underwriting is contracted, renewable revenue, not repeat business built on goodwill. Those are not the same thing, and the gap between them is exactly what gets tested in diligence.
Repeat business that exists because the customer likes you is real, but it is discretionary and it often belongs to the owner. Recurring revenue tied to a signed agreement, with defined scope, defined term, and a renewal mechanism, is an asset that transfers with the company. The paper is what makes it underwritable. When a buyer talks to your top accounts in diligence, "we always use them" is a nice sentiment. A three-year service agreement with an auto-renewal clause is a number they can put in the model.
If your recurring revenue lives on handshakes and history, a buyer sees goodwill. If it lives on contracts, a buyer sees an annuity.
What This Looks Like Across the Trades
The shift shows up differently depending on what you do, but the logic holds across the built environment.
- Mechanical and HVAC: the move from install-and-move-on to a book of planned maintenance agreements attached to the systems you put in. Every install is a potential multi-year service relationship if you build the motion to convert it.
- Building controls: arguably the strongest version of this. Monitoring, remote diagnostics, software and analytics services, and ongoing optimization contracts turn a controls integrator into something that looks a lot more like a recurring-revenue technology business than a project shop. Buyers know this, and they pay for it.
- Energy services and efficiency: measurement and verification, ongoing performance guarantees, and managed energy programs that produce contracted revenue over years rather than a single retrofit fee.
Across all of them, the transformation is the same. You are converting one-time transactions into contractual relationships, and in doing so you are converting a discounted revenue line into a premium one.
The Metrics Buyers Actually Look At
When a buyer evaluates the quality of a recurring base, they go well past "how much." They look at:
- The percentage of total revenue that is truly recurring. Contracted and renewable, separated cleanly from project work in your financials. If you cannot show it, they will assume the number is smaller than you claim.
- Renewal and retention rates. A service book that renews at 95 percent is a different asset than one that churns 30 percent a year. Retention data, tracked over multiple periods, is what turns your recurring revenue story into evidence.
- Contract length and terms. Multi-year agreements with defined renewal mechanics are worth more than month-to-month arrangements that can evaporate at any time.
- Margin on the recurring base. Service and maintenance revenue often carries stronger, steadier margins than project work. Buyers notice when your recurring line is also your most profitable line.
- Who owns the relationship. Recurring revenue that runs through the owner is worth less than recurring revenue where your service managers and account teams hold the relationships. The more it belongs to the company, the more it transfers.
The owners who can put these numbers on the table are the ones who get their recurring revenue underwritten at full value instead of having it argued down.
Why This Is a Multi-Year Build
This is not a repositioning you can do in the six months before you go to market, and buyers can tell the difference instantly.
A service program launched right before a sale has no renewal history, no retention data, and no margin track record. It reads as exactly what it is: a number assembled for the data room. A recurring base built over three, four, five years shows up in the financials across multiple periods. The renewals are real. The retention is documented. The margins are proven. That is the version a buyer will pay for.
That is why this is the first move, not the last. The work of converting installs into agreements, formalizing handshake relationships into contracts, and building the internal motion that renews them, all of it takes time to become credible. The runway is the whole point. Owners who start inside a three-to-five-year window before a transaction show up with a recurring base that is seasoned enough to underwrite. Owners who start late show up with a story.
The mechanics of actually building that service book, mining your installed base, structuring tiered agreements, tying compensation to renewals, and putting the systems in place to prove it, are a topic of their own. We laid out that operational playbook in From Projects to Predictability: Turning Service Work Into Enterprise Value. This post is about the case that makes the work worth doing: why a buyer pays a premium for the result.
The Bottom Line
Project revenue builds the business. Recurring revenue is what sells it. The two are valued differently because they carry different risk, and no amount of a strong backlog changes the fact that a buyer is paying for what happens after they own it, in a market that may not be helping.
The shift from project revenue to recurring revenue is one of the highest-return moves an owner can make in the years before an exit, precisely because it does two things at once: it makes the business more valuable to run today, and it makes it dramatically more valuable to sell tomorrow.
If you are not sure how much of your revenue a buyer would actually count as recurring, or what it would take to move that number over the next few years, that is exactly the conversation to start.
CB Energy works exclusively on the sell side with owners in HVAC, mechanical, controls, and energy services nationwide. If you want an honest read on how your revenue mix would be valued today, and what steps would strengthen it before a sale, reach out and we can start with a conversation.