A buyer is paying for the profit a business will make after the sale. The profit it made before is the evidence. Everything a buyer checks, from the accounts to the customer contracts to who signs off a quote, is a way of testing whether that evidence holds up without the person who built the business. Exit planning is the work of making it hold up before anyone asks.
Much of the groundwork is shared, whatever the exit turns out to be. A trade sale or a sale to staff through an employee ownership trust both end with someone else relying on the business without its founder at the centre. Passing the business on within the family raises the same questions, covered in business succession planning.
For a heating, ventilation and air conditioning (HVAC) company, much of that work can sit in how the business runs: who holds the main contractor and supplier relationships, how jobs are priced and tracked, whether service and maintenance revenue is written down in contracts, and whether the monthly numbers can be trusted. The same applies to the electrical and renewables work that HVAC companies may also take on, such as heat pumps, solar PV, battery storage and EV charging.
Why does exit planning start before the owner wants to exit?
A buyer judges a business on its record, and a record takes time to build. A year of signed maintenance renewals, a full set of accounts showing margins holding up, or an operations manager who has run the business through a busy season are all evidence. A change made a few months before a sale is a promise, and buyers price promises differently from evidence.
The timing is not always the owner’s choice either. An approach from a competitor, a change in health, a business partner wanting out or a key manager leaving can each start a conversation about a sale before anything is ready. An owner who has done the groundwork can respond on their own terms. One who has not is working to the buyer’s timetable.
The same applies when the buyer is the existing team. In a management buyout, the lenders or investors backing the managers will want to see much the same evidence as an outside buyer, because their money depends on the same profit continuing.
Some of the rules around a sale also look back in time. Business Asset Disposal Relief, which can reduce Capital Gains Tax when shares in a trading company are sold, has qualifying conditions that must be met for a period before the sale. Its rate rose on 6 April 2025 and again on 6 April 2026. GOV.UK sets out the eligibility conditions, and the position needs checking at the time of planning.
What separates a profitable business from an investable one?
Profit in the accounts is a record of what happened last year. An investable business is one where a buyer can see how next year’s profit will be made, and who will make it.
A common first step for a buyer is to adjust the reported profit to show what the business earns on its own. An owner’s salary may be above or below what a replacement manager would cost. Personal costs may run through the company. A one-off contract or an unusual bad debt may distort a single year. The adjusted figure is the starting point a buyer works from, so it helps to know it before a buyer calculates it.
Beyond the headline number, a buyer looks at what sits behind it:
- How repeatable the revenue is. Planned maintenance and service contracts that renew each year give a buyer something to rely on. A run of one-off installation projects, however profitable, has to be won again.
- Where the margin comes from. If job costing shows which types of work and which customers make money, a buyer can see whether the margin will hold. If margin is only visible at year end, the buyer has to take it on trust.
- How quickly profit turns into cash. Retentions, slow applications for payment and stage payments can leave a profitable contractor short of cash, so a buyer looks at the working capital the business needs to keep running. In the sale agreement, the price can be adjusted through completion accounts drawn up after completion, or fixed through a “locked box” based on an earlier balance sheet.
- How concentrated the business is. A large share of revenue from one main contractor, one housebuilder or one public sector framework is a risk the buyer has to price.
- What the contracts allow. Some framework agreements, supply agreements and leases contain change-of-control or assignment clauses that need the other party’s consent when the business is sold. A buyer’s lawyers will look for them.
The wider checklist is set out in what makes a business investable.
Check your business: Valuation readiness
- Could you show a buyer, job by job, what margin the business made last year?
- Do you know what the business’s profit would be once your own salary and personal costs are adjusted to what a replacement would cost?
- Could you say how much of next year’s revenue is already under signed contracts?
How do buyers arrive at a valuation?
Some approaches start from a measure of the profit the business can keep making, such as adjusted earnings, and apply a multiple to it. Others start from forecast cash flows or, for some businesses, from the value of the assets. Whatever the method, part of what a buyer is pricing is how confident they are that the profit will continue after the sale.
That is why the figure an owner carries in their head is not yet a valuation. A number heard from a friend’s sale or a headline multiple from another sector has not been tested against this business’s record, contracts and people. A valuation is that test, and the evidence behind it can be built before a sale is on the table.
The headline price is also only part of the answer. A buyer may pay some of the price at completion and some later, either as fixed deferred payments or as an earn-out that depends on how the business performs after the sale. The methods themselves are explained in how to calculate business valuation.
What is founder dependency, and why does it affect price?
Founder dependency is the extent to which the business’s revenue, decisions and know-how sit with the owner personally. In an HVAC, electrical or renewables company it can show up in a few places:
- The main contractor, developer and supplier relationships are held by the owner, and customers ring the owner rather than the office.
- The owner prices every tender or signs off every quote and variation.
- The owner is the person the bank, the insurer and the certification bodies deal with.
- The knowledge of how jobs are run, which engineers suit which sites and which customers pay late is held in one person’s head rather than written down.
None of this is a fault. It is how many owner-managed businesses are built, because the founder was the business in its early years. The issue at the point of sale is that a buyer cannot buy the owner. If the revenue depends on someone who is leaving, the buyer has to protect themselves, and there are several ways to do that: a lower price, more of the price deferred or tied to an earn-out, or a requirement for the owner to stay on for a handover period.
A useful test is what happens to quotes, decisions and customer conversations when the owner is away for a month. How buyers weigh owner dependency in this sector is covered in how buyers value an HVAC company.
Check your business: Founder dependency
- If you were away for a month, would quotes still go out priced and approved?
- Are your main customer and contractor relationships held by more than one person in the business?
- Is anyone other than you named as the contact with the bank, the insurer and the certification bodies?
What can a data room do, and what can it not?
A data room is an organised store of the documents a buyer and their advisers review during due diligence. For a contractor it can hold the company’s statutory records and accounts, management accounts, customer and supplier contracts, employee records, health and safety records, insurance policies, details of any disputes, property leases, and the company’s trade registrations and certifications, such as Gas Safe registration, F-gas company certification, NICEIC or NAPIT registration, and MCS certification for heat pump or solar PV work.
A well-prepared data room does three things. It speeds up due diligence, it shows a buyer the business is run in an orderly way, and it reduces the chance of surprises late in the process, when a buyer may respond by reducing the price or asking for stronger warranties and indemnities in the sale agreement.
What a data room cannot do is change what the documents show. If customer contracts are unsigned, if margins cannot be traced to jobs, or if the main relationships are personal to the owner, a tidy data room shows that more clearly, not less. The story a seller tells about where the profit will come from has to be true in the business before it can be supported in the documents. What a buyer’s tax advisers look for during due diligence is covered in business sale preparation.
Trade registrations need their own check. Some sit with the company, some depend on a named person such as a Qualified Supervisor or a registered engineer, and each scheme has its own rules on a change of ownership. Whether the sale is of the company’s shares or of its business and assets affects which registrations move with the business.
Employee records in a data room are personal data. The Information Commissioner’s Office data sharing code says data sharing must be considered as part of due diligence on a merger or acquisition, including what data is being transferred, the purposes it was originally obtained for and the lawful basis for sharing it. The ICO notes that its guidance on due diligence is under review following the Data (Use and Access) Act, so the position needs checking at the time of planning.
How does exit planning improve a business that never sells?
The work that makes a business sellable is largely the same work that makes it easier to run. Jobs that are priced and costed properly, contracts that are written down, a management team that makes decisions without waiting for the owner, and monthly numbers that can be trusted all help the business whether or not it changes hands.
It also keeps the choice open. Plans change: a family member may decide to take over, the management team may want to buy, an investor may offer to fund growth, or the owner may simply want to work fewer days. Each of those routes needs the business to stand up without its founder at the centre. Exit planning gives the owner a better chance of choosing between them, rather than having the choice made by circumstance.
Frequently asked questions
Exit planning is the work of preparing a business so that its owner can leave it, whether by selling it, passing it on or bringing in new owners. It covers how the business runs, how its profit is shown and evidenced, and how dependent it is on the owner. The aim is a business whose profit a buyer or successor can rely on after the owner has gone.
It depends on how much of the business runs through the owner, how far the records and contracts already support the profit, and which route the owner has in mind. Some of the pace is set by time itself: the accounts a buyer reviews cover whole financial years, and reliefs such as Business Asset Disposal Relief have qualifying conditions that must be met for a period before the sale.
Due diligence is the buyer’s investigation of the business before the sale completes. The buyer’s advisers review the financial, legal, commercial, tax and operational records to test what the seller has said. What they find can affect the price, the terms and the protections the buyer asks for in the sale agreement.
In a share sale, the buyer buys the company itself, so its contracts, employees and liabilities stay with the company. In an asset sale, the company sells some or all of its business and assets, and the buyer takes on only what is agreed. Where a business moves from one employer to another, employees may be protected by the TUPE regulations; GOV.UK explains that for a business transfer the identity of the employer must change. GOV.UK also lists a seller’s responsibilities when selling a limited company.
An earn-out is part of the sale price that is paid after completion, where the amount depends on what happens after the sale, often the business’s future profits. HMRC’s Capital Gains Manual calls payments whose amount depends on events after the sale “unascertainable” deferred consideration and treats them differently from fixed deferred payments.
Business Asset Disposal Relief, previously called Entrepreneurs’ Relief, can reduce the Capital Gains Tax paid when someone sells shares in a trading company or a business they own, where the qualifying conditions are met. GOV.UK sets out who qualifies.
Sources
- GOV.UK: Business Asset Disposal Relief: Eligibility
- GOV.UK: Selling your business: your responsibilities: Limited company
- GOV.UK: Business transfers, takeovers and TUPE
- HM Revenue & Customs: Capital Gains Manual CG14940, unascertainable deferred payments
- Information Commissioner’s Office: Due diligence when sharing data following mergers and acquisitions
Sources last checked: October 2026.
