Plumbing has a structural disadvantage relative to HVAC when it comes to exit value, and it is worth naming plainly: plumbing demand is mostly event-driven[1]. A clog, a leak, a failed water heater. Nobody schedules an emergency. HVAC, by contrast, has a natural seasonal maintenance rhythm that supports membership programs more easily. The consequence is that recurring-revenue mix in plumbing is typically lower, and published commentary puts the resulting plumbing-to-HVAC multiple gap at roughly 0.5x to 1.0x EBITDA at comparable size and recurring-revenue levels[2].
Key Takeaway
Sophisticated buyers do not apply one multiple to a plumbing company. They run a separate valuation on each revenue stream and add them together: contracted, recurring service-agreement revenue is underwritten at a lower cost of capital and a higher multiple, while project and one-off service revenue carries a higher discount rate for cyclicality and customer-acquisition risk. Published commentary consistently associates service-agreement revenue above roughly 25% to 30% of total with a meaningful multiple premium. Note that nearly all published multiple data in this sector is drawn from US transactions and should be treated as directional for Canadian owners, not as a Canadian benchmark.
The Structural Problem With Plumbing Revenue
Event-driven revenue is not bad revenue. It is often high-margin, and emergency work in particular commands premium pricing. The problem is purely a valuation problem: it is unpredictable, it requires continuous marketing spend to replenish, and a buyer underwriting it has to assume it could soften. A buyer looking at $3 million of revenue that came entirely from inbound emergency calls is looking at $3 million that must be re-won next year, through marketing the buyer will have to keep funding.
A service agreement inverts that. It is a contracted relationship with known renewal mechanics and measurable churn, which means it can be modelled the way subscription businesses are modelled. That is precisely how private-equity-backed acquirers in this sector describe their own underwriting: recurring service-agreement books modelled with explicit attach rates, member churn, and conversion rates off the member base, while project revenue is discounted separately at a higher rate[1].
How Buyers Actually Model It
The practical implication of two-stream valuation is that growing your recurring book changes your multiple, not just your earnings. That is a fundamentally different lever than most owners think they are pulling when they add a maintenance plan.
Consider the arithmetic. A shop adding $200,000 of high-margin project revenue at a 4x multiple adds roughly $800,000 of enterprise value against the incremental EBITDA. The same shop converting $200,000 of existing revenue into contracted recurring revenue may add nothing to EBITDA at all, and still increase enterprise value, because the blended multiple applied to the whole business moves. Published commentary describes service-agreement penetration above 25% as driving a 1x to 2x EBITDA premium relative to project-heavy peers[2], and separately notes that even shifting roughly 20% of revenue to recurring contracts can move a business into a higher multiple range[3].
Adjacent recurring streams behave similarly. A water treatment practice at even 10% to 15% of revenue is associated with higher multiples, on the reasoning that it attaches a recurring consumable stream with high retention and above-average gross margins[2].
What The Published Multiples Say
Published ranges vary by source, size and methodology, and should be read as broad orientation rather than precision. Across the HVAC, plumbing and electrical contracting space, one survey puts EBITDA multiples at roughly 2.4x to 10.8x, with the highest valuations going to larger, service-heavy businesses generating recurring revenue and stable cash flow[4]. Plumbing-specific commentary for 2026 describes a 4x to 6x EBITDA range, lifted by recurring service contracts and private equity roll-up activity[2]. Smaller businesses are more commonly valued on seller's discretionary earnings, where one source describes well-positioned plumbing and HVAC companies with recurring service revenue at roughly 3.5x to 5.5x SDE[5].
The consistent theme across all of them is stream differentiation rather than the headline range. One source separates recurring maintenance contracts at 5.0x to 6.0x SDE from project and installation revenue at 2.5x to 3.5x[5]. Another describes buyer interest in this sector rising sharply, citing private equity participation in HVAC acquisitions increasing from 8% in 2023 to 23% in 2024[3]. Whatever the precise numbers in any given market, the direction is not in dispute: contracted revenue is worth a materially higher multiple than event-driven revenue.
A Necessary Caution On US Data
Almost all published multiple data in this sector comes from US transactions, and several of the sources cited above reference US-specific concepts explicitly, top-50 US metropolitan statistical areas, state-level licensure, US private equity platforms[6]. Canadian owners should treat these figures as directional evidence that recurring revenue commands a premium, not as a benchmark for what a Canadian plumbing business will actually fetch.
Several Canadian-specific factors argue for caution. The Canadian buyer pool for mid-market trades businesses is thinner, which compresses competitive tension in a sale process. Provincial licensing regimes differ, affecting how transferable a workforce is. And the Canadian tax treatment of a share sale versus an asset sale, including lifetime capital gains exemption planning, often affects net proceeds more than a half-turn of multiple does. The strategic conclusion still holds, build recurring revenue, but the specific numbers should come from a Canadian valuation professional looking at your actual business, not from a US roll-up's published range.
Deferred Revenue: The Accounting Nobody Gets Right
Here is where a lot of plumbing shops create problems for themselves years before a sale. A customer pays $240 in January for a twelve-month maintenance plan. That is not $240 of January revenue. It is a liability, unearned revenue, that gets recognized over the service period as the obligations are performed.
Shops that book the full amount as revenue on receipt overstate current-year revenue and profit, understate liabilities, and create a mess that surfaces during due diligence at exactly the wrong moment. Worse, the misstatement compounds: a growing membership book means a growing deferred balance, so a shop recognizing prepayments immediately reports accelerating revenue that is partly just accelerating collections. A buyer's quality-of-earnings review will find it, restate it, and lower the price accordingly, and the owner will have spent years believing the business was more profitable than it was.
The correct treatment recognizes revenue as the service obligations are satisfied, which for a plan with scheduled visits generally means recognizing at the visits or ratably across the term depending on the plan's structure. Under ASPE, the pattern should reflect how the obligations are actually discharged, and the specific approach is worth confirming with your accountant rather than defaulting to straight-line. The discipline pays twice: accurate margin reporting during the hold, and a clean deferred revenue schedule during diligence.
The Working Capital Trap At Closing
There is a second-order consequence of deferred revenue that catches owners at closing. A membership book creates a real liability on the balance sheet: obligations to perform services already paid for. In most transactions, deferred revenue is treated as a liability the buyer assumes, and is therefore either deducted from purchase price or funded through the working capital adjustment.
Owners are frequently surprised by this. Having spent years building recurring revenue on the correct understanding that it raises the multiple, they arrive at closing and find the deferred balance reducing their proceeds. Both things are true simultaneously: the book raises enterprise value through the multiple, and the unearned portion reduces the cash you take home. Understanding this in advance lets you model the net outcome properly and, importantly, avoid the tempting mistake of aggressively collecting annual prepayments right before a sale, which inflates the deferred liability at precisely the moment it will be netted against your proceeds.
What Buyers Actually Audit
A service agreement book is only worth a premium if it survives scrutiny. Sophisticated buyers conduct detailed audits of service contracts[5], and what they test is fairly predictable: are the agreements written and signed, or informal understandings? What is the documented renewal and churn rate over multiple years? Is the agreement with the business or with a particular technician the customer trusts? Is the revenue per member and the attach rate for follow-on work measurable? Are the plans actually profitable, or loss-leaders that generate obligations without margin?
That last question matters more than owners expect. A membership plan priced below the cost of delivering it does not become an asset simply because it recurs; it becomes a contracted obligation to lose money on schedule. Buyers model member economics explicitly, including the conversion rate from membership into higher-value replacement work such as water heaters[1], so a plan whose value depends on that attach rate needs the attach rate documented, not asserted.
Building The Book From Zero
For a plumbing shop starting without any recurring revenue, the realistic entry points are the ones tied to genuine, recurring physical need rather than invented service events. Annual maintenance plans covering water heater inspection, supply line checks, drain cleaning and shut-off valve testing are the common construction, and published commentary describes plans with roughly $150 to $250 annual customer value and a few hundred active members as the point where the book starts becoming a recognized asset[2].
Two practical notes. First, the existing customer base is the cheapest possible acquisition channel: a shop with several thousand historical service customers has a conversion opportunity that requires no new marketing spend, only a systematic offer. Second, multi-unit residential and property management relationships behave more like contracted books than individual residential customers do, and are described by acquirers as a distinct valued asset alongside residential membership programs[1]. For many Canadian plumbing shops, a property management book is a faster route to defensible recurring revenue than a consumer membership program.
Owner Dependency: The Discount Nobody Discloses
Recurring revenue raises the multiple. Owner dependency lowers it, often by more, and in small plumbing businesses the two frequently coexist in a way owners do not recognize until diligence.
The test buyers apply is straightforward: if the owner stopped answering the phone for ninety days, what happens? In many plumbing shops the answer is that estimating stops, key customer relationships wobble, technical escalation has nowhere to go, and, in shops where the owner holds the qualifying master licence personally, the business may not be legally able to operate at all. That last point is specific to licensed trades and materially more serious than general key-person risk: a licence attached to the departing owner is not an asset that transfers with the shares.
Published commentary on this sector consistently identifies reduced owner dependency, delegation to a skilled management team, and bench depth of licensed technicians as direct valuation drivers[3], with master-licence depth beyond the owner cited specifically as a lever[6]. For a Canadian owner, the practical sequence is to confirm what the provincial regulator actually requires for the business to hold its licence, then ensure at least one other person on staff independently satisfies it well before a sale process begins. Building that bench takes years, which is precisely why it cannot be addressed during a transaction.
What To Do
Separate your revenue into recurring and event-driven in your own reporting, most plumbing shops cannot currently produce this split, and you cannot manage a mix you do not measure. Confirm your deferred revenue treatment with your accountant now rather than discovering it in diligence. Measure member economics honestly, including whether the plans are profitable on their own and what they actually convert into. If an exit is on any horizon, get a Canadian valuation opinion rather than anchoring on US published ranges. And if you are starting from zero, begin with your existing customer list and the maintenance obligations that genuinely recur, rather than manufacturing a plan the customer does not need and will not renew.
The Structuring Question That Precedes The Multiple
Owners focused on multiple expansion sometimes discover late that structure determined more of their net outcome than valuation did. For a Canadian plumbing business, three structuring questions deserve attention well before a sale process.
Share sale versus asset sale. Vendors generally prefer a share sale for access to the lifetime capital gains exemption on qualifying small business corporation shares; buyers often prefer an asset purchase for the step-up in depreciable cost base and to avoid assuming historical liabilities, which in a plumbing business specifically includes the warranty and completed-operations tail discussed elsewhere in this publication. That tension is negotiated, and the resolution affects net proceeds materially.
QSBC qualification. Access to the lifetime capital gains exemption depends on the corporation meeting asset-composition tests, and a company carrying substantial non-active assets, surplus cash, investments, or property not used in the active business, can fail them. Purification is a planning exercise with timing requirements; it is not something to begin when a letter of intent arrives.
The deferred revenue interaction. As discussed above, an unearned revenue balance is generally treated as an assumed liability. How it is characterized in the transaction documents, and whether it flows through the working capital adjustment or the purchase price, has both commercial and tax consequences worth modelling in advance.
None of this diminishes the case for building recurring revenue. It simply means the multiple is one of several levers, and for many owner-operated Canadian plumbing businesses, it is not the one with the largest effect on the amount actually banked.
Frequently Asked Questions
Do the published US multiples apply to a Canadian plumbing business?
How much recurring revenue do I need before it affects my valuation?
How should I account for a customer who prepays a year of maintenance?
Why would deferred revenue reduce what I receive at closing?
Is a maintenance plan worth offering if it barely breaks even?
References
- Main Street Wealth. (2026, June 8). How Private Equity Values Plumbing Service Contracts (2026 Math). mainstreetwealth.ai/resources/how-pe-values-plumbing-contracts
- CT Acquisitions. (2026, July 3). Plumbing Business Valuation: 2026 EBITDA Multiples. ctacquisitions.com/plumbing-business-valuation-guide
- ClearlyAcquired. (2026, March 30). What is a "Multiple" and How Does it Determine Your HVAC or Plumbing Business Value? clearlyacquired.com/blog/what-is-a-multiple-hvac-plumbing
- ClearlyAcquired. (2026, March 30). EBITDA Multiples for HVAC, Plumbing, and Electrical Contractors. clearlyacquired.com/blog/ebitda-multiples-hvac-plumbing-electrical
- Jaken Equities. How to Value a Plumbing or HVAC Company. jakenequities.com/articles/hvac-plumbing-business-sales
- Ad Astra Equity. (2026, June 5). Plumbing Business Valuation & EBITDA Multiples (2026). adastraequity.com/ebitda-multiples/plumbing-business
Valuation multiples cited are drawn from predominantly US-based published commentary and are illustrative only. They are not an opinion on the value of any specific business and should not be relied on for transaction planning. Obtain a formal valuation from a qualified Canadian valuation professional, and confirm revenue recognition treatment with your accountant.