Skip to main content

Advised by Leo Meggitt, Managing Director, Mastella Advisory

Selling a UK business worth £5–50M is a 6–9 month process that follows a clear sequence — and a single owner-led decision tree at each stage. Here is what actually happens and where owners typically get the wrong advice.

The six-stage process

Selling a UK business worth £5M to £50M is a structured six-stage process that runs in a predictable sequence. The order matters; trying to compress or skip stages is what produces poor outcomes. We walk through this in more depth on our process page, but the short version below is what every owner should expect.

Stage one is readiness assessment. A clear diagnostic of where the business is against what buyers will actually diligence. Financial reporting hygiene, EBITDA quality, customer concentration, management depth, contract position, IP ownership, tax structure. If the readiness work has not been done already as part of an exit planning engagement, this stage identifies the items that need attention before going to market.

Stage two is preparation. Financial normalisation and EBITDA bridge build-out. Information Memorandum drafting. Buyer mapping across strategic, PE and specialist buyer pools. Data room build. Tax structuring. This stage typically runs six to ten weeks.

Stage three is the marketed approach. Off-market, under NDA. A curated list of 40 to 80 strategic and PE buyers is approached directly with a teaser. Interested buyers are then admitted to the data room and the IM under NDA. This stage runs four to eight weeks.

Stage four is competitive bidding. Indicative offers are received, evaluated, and a shortlist is selected. Selected buyers are admitted to deeper diligence and management meetings. Final binding offers are received. This stage runs four to eight weeks.

Stage five is selection and diligence. The preferred buyer is selected and exclusivity is granted (usually with structuring discipline to protect the seller's position). Full diligence runs across commercial, financial, tax, legal, technical and (where applicable) operational and regulatory threads. Six to ten weeks.

Stage six is legal documentation and exchange. The Share Purchase Agreement and ancillary documents are negotiated. Completion mechanics are agreed (working capital, completion accounts, earn-out where applicable). Exchange happens, sometimes simultaneously with completion, sometimes with a delay where regulatory or consent steps require it. Four to eight weeks.

What to do 12 months before going to market

The single most important factor in a strong outcome is starting preparation 12 to 24 months before the target sale window. The list below is the minimum we expect a business to have addressed before going to market.

Financial reporting clean. Management accounts that reconcile cleanly to statutory accounts. EBITDA bridge documented with adjustments that are defensible to the line. KPI reporting that buyers will recognise as authoritative.

Customer concentration mapped. Top 20 customers by revenue documented with tenure, contractual position, switching cost and operational integration. Anchor relationships strengthened where time allows.

Management team depth visible. A credible second-in-command and senior team that can run the business if the owner stepped back. Founder-held customer relationships documented and broadened.

Contracts and IP clean. Key customer contracts reviewed for assignability and change-of-control. IP ownership documented and unambiguous, particularly where IP has been created by contractors. Material supplier contracts reviewed.

Tax structure considered. Pre-sale tax structuring planned with specialist counsel. The structuring window for some interventions closes 12 months before a sale.

Property strategy decided. Where freehold sits in the business, the strategy on retention, lease-back, or bundled sale agreed.

Common owner mistakes

We see the same set of mistakes consistently across owners we meet for the first time. The honest version is below.

Going too early. Running a process without readiness work consistently costs owners value and certainty. The marketed process amplifies whatever the business is on the day. Cleaning up the things that will be diligenced before they are diligenced costs less than re-trading at completion or losing the deal.

Going to broker networks at the £5M+ level. Brokers serve real value for businesses worth under £2-3M. For businesses worth £5M and above, broker network listings reach a smaller and lower-quality buyer pool than a structured off-market process across strategic and PE buyers reachable directly under NDA. The outcome gap is material — see business broker vs M&A advisor for the detail.

Granting exclusivity to a single bidder too early. The most common single mistake. Exclusivity transfers all negotiating leverage to the buyer. Granted in the wrong sequence or without sufficient process structure underneath it, it costs owners both price and terms. Structured exclusivity granted at the right point — after competitive bidding and with disciplined milestones — preserves the seller's position.

Under-valuing terms vs price. Owners typically focus on headline price and under-weight the structuring of earn-out, working capital mechanism, indemnity caps, and tax efficiency. The structuring elements consistently affect realised net proceeds by more than the headline multiple.

If you are thinking about a sale and want a senior-led view of what a process should look like for your business specifically, book a confidential conversation. Forty-five minutes, no obligation.

Want to talk about your situation?

Book a confidential conversation

FAQ

How to sell a business: FAQs

What are the main stages of selling a business?

Six stages: (1) readiness assessment, (2) preparation (financial normalisation, IM, buyer mapping), (3) marketed approach to buyers under NDA, (4) competitive bidding, (5) selection and diligence, (6) legal documentation and exchange. End-to-end is typically 6–9 months.

Should I use a broker or an M&A advisor?

Brokers typically suit businesses worth under £2–3M and use database-listing models. M&A advisors run off-market processes for businesses worth £5M+, contacting curated buyer sets under NDA. The two approaches produce very different outcomes — see our resource on this.

How is my business going to be valued?

Buyers typically value owner-managed businesses on a multiple of adjusted EBITDA. The multiple varies by sector, growth rate, customer concentration and management depth. We provide an indicative range in the first conversation.

How do I keep the sale confidential?

Use an off-market process — direct approaches to a curated buyer list under NDA, no public listings. This is the default approach for Mastella mandates.

What is an earn-out and should I accept one?

An earn-out is a portion of the price contingent on post-sale performance. They are very common in the lower mid-market. Whether to accept one — and on what terms — is a structuring decision that depends on your tax position, post-sale role and the buyer's plan for the business.

How are M&A advisor fees structured?

Mastella works on a high monthly retainer model that funds senior-led delivery throughout the mandate. Full structure shared in the first conversation.

How long should I plan for?

Allow 6–9 months from engagement to completion, plus 6–12 months of pre-process readiness work if you have not done it yet. Owners who start early consistently achieve better outcomes.

15+

Years in M&A

£400M+

Transaction value advised

30+

Completed transactions

10

Sectors

Ready when you are.

Forty-five minutes, no obligation. We will tell you honestly whether what you want to achieve is realistic — and whether Mastella is the right firm for it.

AlignedWe work on a high monthly retainer model that funds senior-led delivery throughout — not a commission structure that rewards getting any deal done.

Book a confidential conversation