A buyer of an HVAC company is buying future profit. The price starts from the earnings the buyer believes will carry on after completion, so the years before a sale are an important time to improve and evidence profit. Improving profitability before selling is the work of raising the profit a buyer can see, verify and expect to continue, before the business goes to market.
This post sets out where margin leaks in HVAC, electrical and renewables installation businesses, how maintenance contracts and working capital change what a buyer pays, and which short-term improvements a buyer is likely to see through.
Why does profit before a sale matter so much to an HVAC buyer?
Profit before a sale matters because a buyer typically values an HVAC company on its adjusted earnings and applies a multiple to them. Each pound of profit the buyer accepts as sustainable is counted several times over in the price; each pound the buyer cannot verify adds little to the price paid at completion.
Dealsuite’s UK&I M&A Monitor August 2026, based on responses from 102 of the 437 UK and Irish M&A advisory firms it contacted, reporting on deals for companies with £1 million to £200 million revenue in the first half of 2026, put the average EBITDA multiple at 5.4 across sectors. That figure is a cross-sector benchmark for UK and Irish deals in that size band, not a multiple for HVAC companies. Sector multiples differ from it, and the multiple for a particular company depends on its size, risk and earnings quality. How buyers arrive at the multiple for this sector is covered in how buyers value an HVAC company.
Two points follow from the way the calculation works: the profit multiplier, and trend over spike.
- The profit multiplier. Profit is not added to the price once. It is multiplied, so a margin improvement that holds up is worth far more at sale than the same sum taken as cash in a single year.
- Trend over spike. A buyer reviews several years of results. A steady upward trend backed by management information is easier to defend in due diligence than one strong year that nobody can explain.
Where do HVAC and electrical contractors lose margin without seeing it?
Margin in an installation business leaks in the gap between the price quoted and the full cost of delivering the work. Five places where margin can leak in HVAC, electrical and renewables contracting are blended margins, unbilled variations, unbilled labour hours, return visits, and prices that have fallen behind costs.
- The blended-margin blind spot. A single gross margin figure for the whole company can look healthy while some job types or customers lose money. Profitable service work can hide installation projects won at or below cost.
- Free variations. Extra work agreed on site, such as an additional circuit, a relocated indoor unit or a longer pipe run, is done but never priced, approved or invoiced.
- Paid hours, not billed hours. Engineers are paid for travel, waiting, collecting materials and paperwork. If those hours are not built into rates, labour cost rises while billed hours stay flat.
- The second visit. Return visits to fix snags, commission again or collect missing information cost labour and van time, and may not be chargeable to the customer unless the contract allows it.
- Last year’s prices. Schedules of rates, maintenance contract prices and standard quotes that have not been reviewed since costs last rose carry a margin that no longer exists.
These leaks sit in how jobs are priced, recorded and closed, which is why they can stay hidden as a business grows.
What margin reporting does a buyer expect to see before a sale?
A buyer expects to see service and installation margins reported separately, job by job and month by month, in figures that agree with the management accounts. Separate reporting shows where the profit is made and gives the owner the evidence to address work that loses money.
A buyer looking at an HVAC or electrical contracting company wants to see the economics of each revenue stream, because planned maintenance, reactive service and project installation carry different risks. Three habits make the numbers credible: estimate against actual, one version of the truth, and a monthly margin rhythm.
- Estimate against actual. Every job is closed with its estimated cost compared to its actual labour and materials, so the gap is visible while the job is still fresh.
- One version of the truth. Management accounts, job costing and the figures shown to a buyer come from the same source and agree with each other.
- A monthly margin rhythm. Margin by job type and customer is reviewed every month, not only at year end, so a falling margin is caught before it shows up in the annual accounts.
Check your business: margin visibility
- Can the business show gross margin separately for maintenance, reactive service and installation work for each of the last 12 months?
- Is every completed job closed with its estimated cost compared to its actual labour and materials?
- Are variations agreed on site priced and approved before the extra work is done?
How do maintenance contracts change the profit a buyer will pay for?
Planned maintenance contracts change profit by turning one-off visits into contracted income that repeats each year. A buyer can forecast contracted, profitable maintenance income with more confidence than project work, which supports the earnings the price is built on.
Regulation creates part of the demand for this work. GOV.UK guidance on checking F gas equipment for leaks makes users of stationary air conditioning and heat pump equipment responsible for getting it checked for leaks, at least once every 12 months for equipment holding 5 to under 50 tonnes of CO2 equivalent and every six months from 50 to under 500 tonnes, with longer intervals allowed where automatic leak detection is fitted. In rented housing, landlords in England, in both the private and social rented sectors, must have the electrical installations in their properties inspected and tested at least every five years by a qualified person.
Contracts add most value when they make money. Three tests show whether a maintenance base is an asset or a cost: recurring revenue, renewal and visits delivered as sold.
- Recurring revenue, not recurring losses. Each contract is priced to cover its visits, travel and parts, and reviewed when costs change.
- Renewal, not reminder. Contracts renew on agreed terms rather than relying on the customer remembering to book.
- Visits delivered as sold. Planned visits happen on schedule, so income is earned and the customer has a reason to renew.
A buyer also distinguishes income that is contracted from income that simply tends to come back, a difference set out in the operational improvements that increase business valuation. Why contract quality matters more than contract volume is covered in how to grow an HVAC business.
How does working capital affect the cash received at completion?
Working capital affects the cash received because a sale agreement may price a business on a cash-free, debt-free basis with a target level of working capital. Where the deal uses completion accounts, the price is adjusted if working capital at completion is above or below that target.
The working capital definition and the target level are set in the sale agreement. Under a locked-box mechanism, the price is based on an earlier balance sheet and is not usually adjusted for the working capital position on the completion date.
Four working capital items tie up cash in an installation business: work in progress, debtors, retentions and grant-funded installs. What the business owes its suppliers offsets them.
- Work in progress. Labour and materials spent on jobs not yet invoiced. Staged applications for payment and prompt final accounts reduce it.
- Debtor days. The time customers take to pay. The government’s Commercial Payments Bill, introduced to Parliament in May 2026, proposes a 60-day cap on payment terms for large firms paying smaller suppliers, with strictly limited exemptions, and mandatory interest on late payments at 8% above the Bank of England base rate. These are proposals in a bill, not yet in force, so the position needs checking at the time of planning.
- Retentions. Sums held back under construction contracts. The Commercial Payments Bill would also prohibit the deduction and withholding of retention payments under construction contracts. The government has said it will consult further on when this takes effect.
- Grant-funded installs. Under the Boiler Upgrade Scheme, installers deduct the full grant from the property owner’s quote before any payment is made, and Ofgem pays the installer after a successful voucher redemption. Ofgem’s Boiler Upgrade Scheme guidance for installers, version 5.2 describes a weekly payment schedule, with payments usually made within five working days of approval, and notes that banks may take up to three to five further working days to clear funds. Until the payment arrives, the installer funds that part of the job.
Each of these points sits on the quote to cash process, from the first quote to the final payment. Shortening that cycle improves cash whether or not a sale follows.
Which profit improvements will a buyer see through?
A buyer is likely to see through any improvement that defers a cost rather than removes it. Due diligence adjusts reported profit to show the profit the business will produce under normal running, so savings that cannot be repeated are taken back out.
Four items a buyer may challenge in due diligence are deferred costs, unfilled roles, below-market pay and add-backs without evidence:
- Deferred is not saved. Postponed vehicle replacement, training, tooling or system upgrades raise this year’s profit but leave a cost the buyer will have to meet.
- The empty chair. Holding off a needed hire, or leaving a manager’s role unfilled, lifts profit only while the owner or team covers the gap.
- Below-market pay. Owners or family members paid below the market rate for their role may have their pay restated to a market rate, which reduces the adjusted profit.
- Add-backs without evidence. Costs described as one-off or personal are added back only where the evidence supports it.
How buyers restate profit to adjusted EBITDA, and which adjustments tend to hold, is set out in how buyers value an electrical contracting company. The improvements that hold up are the ones built into how the business runs: better pricing, fewer leaks, contracted income and faster cash.
Check your business: profit a buyer will accept
- Has investment in vehicles, tools, training and systems kept pace over the last two years, rather than being postponed to protect profit?
- Is every role the business needs filled and paid at a market rate, including the owner’s?
- Could each cost described as one-off or personal be backed by invoices and a clear explanation?
When should you start improving profitability before a sale?
Improving profitability before a sale needs to start early enough for the results to appear in full years of accounts and in the trend a buyer reviews. A change made in the final months before going to market has little trading history behind it.
The same work serves more than one outcome. Rostone’s GRAX system describes four routes a business can take: Grow, Raise, Acquire or Exit. Higher, better-evidenced profit supports each of them, whether the aim is to fund growth, raise investment, buy another business or sell. A business run this way is better placed when an opportunity arrives, rather than starting to prepare once it has.
Profitability is one part of what makes a company attractive to buyers. The wider picture, including owner dependence and the team below the owner, is covered in what makes an HVAC business sellable. The full preparation sequence, from restating profit to building the data room, is in what to do before approaching buyers. For an outside view of where margin and cash are being lost, the Business Value Diagnostic ends in a written report and a first 90-day plan.
Frequently asked questions
Adjusted EBITDA is earnings before interest, tax, depreciation and amortisation, restated to remove one-off items and to bring costs such as owner pay to a normal level. Buyers use it to estimate the profit the business can sustain year to year, and it is the figure the valuation multiple is applied to.
Maintenance contracts add value to an HVAC company when they are priced to cover their visits and renew on agreed terms, because a buyer pays for profit that continues, not for turnover.
Completion accounts and a locked box are two ways of fixing the final price in a sale agreement. With completion accounts, the price is adjusted after completion for the actual cash, debt and working capital on the completion date; with a locked box, the price is based on an earlier balance sheet, with protections against unauthorised value leaving the business after that date.
A quality of earnings review is a buyer’s check, usually carried out by accountants, of whether reported profit is real, repeatable and supported by evidence. It produces the adjusted EBITDA figure the buyer relies on, so add-backs, margins and revenue streams are tested against records.
Sources
- Dealsuite: UK&I M&A Monitor August 2026
- GOV.UK: Commercial Payments Bill overview; Commercial Payments Bill announcement; Checking F gas equipment for leaks; Electrical safety standards in the private and social rented sectors
- Ofgem: Boiler Upgrade Scheme: guidance for installers, version 5.2
Last updated: 6 November 2026
