Learning how to buy a small business in the UK comes down to a repeatable process: find a target, agree a headline price and structure with the seller, sign heads of terms with a period of exclusivity, run due diligence across the finances, the legal position and the commercial reality, then complete through a solicitor with a signed purchase agreement and the money transferred. Most owner-managed deals take three to six months from offer to completion, and you should expect to pay for a solicitor and an accountant to protect you.
The two decisions that shape everything are how you value the business and whether you buy the assets or the company shares. Get those right and the rest is process. This guide covers where businesses are listed, how valuation actually works for small firms, the three strands of due diligence, TUPE when staff transfer, the legal documents, funding routes and the mistakes that sink deals. Take professional legal and tax advice before you commit; nothing here is a substitute for it.
Where UK businesses are actually listed
Most small businesses for sale in the UK appear on a handful of marketplaces and through business transfer agents. Well-established listing sites include BusinessesForSale.com and Rightbiz, and it is worth checking that any platform you rely on is still trading before you build a search around it, because business marketplaces come and go. Trade press, sector forums and local accountants also carry quiet listings that never reach the public sites.
A business transfer agent, sometimes called a business broker, acts for the seller. They market the business, screen buyers, hold the flow of information and push the deal towards completion. Their fee is paid by the seller, so remember whose interests they serve. Useful for access and momentum, but never a substitute for your own advisers.
Off-market deals are often the best value because there is no auction pushing the price up. If you know the sector, approach owners near retirement directly. A polite letter to a firm you admire can start a conversation that no listing site would ever produce.
Asset purchase or share purchase: the fundamental split
Every business sale is structured one of two ways, and the choice drives liabilities, tax and complexity.
In an asset purchase you buy specific things: the equipment, stock, goodwill, brand, customer lists and chosen contracts. You leave the legal company behind with the seller, along with most of its history. In a share purchase you buy the company itself by acquiring its shares, so you inherit everything the company owns and everything it owes, known and unknown.
Buyers usually prefer an asset purchase because it leaves old liabilities behind. If the previous owner underpaid VAT or faces a claim you never spotted, that stays with the company you did not buy. Sellers usually prefer a share purchase because it is a clean exit: they walk away from the company and its liabilities in one move, and it can be more tax efficient for them.
This tension is normal. Where you land often depends on relative bargaining power, the tax position and whether key contracts can move without consent. Some customer contracts, leases and licences cannot be transferred in an asset deal without the other party agreeing, which sometimes forces a share purchase even when the buyer would rather not.
| Factor | Asset purchase | Share purchase | Best for |
|---|---|---|---|
| Liabilities | Left with the seller in most cases | Inherited in full, known and hidden | Buyers wanting a clean slate |
| Employees | Transfer automatically under TUPE | Stay with the company, no TUPE needed | Either, but plan for staff |
| Contracts and licences | Often need consent to transfer | Usually continue, subject to change of control clauses | Contract-heavy businesses lean to shares |
| Tax | Can suit the buyer | Often suits the seller | Depends; take tax advice |
| Complexity | Simpler on hidden risk | Heavier due diligence, deeper warranties | First-time buyers often prefer assets |
How to value a UK small business
For owner-managed firms, valuation is built on profit, not revenue. A revenue multiple misleads because two businesses with the same turnover can have wildly different profit, and turnover pays no bills. Look at what the business actually earns after real costs.
Adjusted net profit and SDE
The starting figure is adjusted net profit, and for smaller firms this is often expressed as SDE, seller’s discretionary earnings. SDE is the profit plus the owner’s salary and benefits, plus one-off and non-trading costs, because a new owner would not carry those in the same way. It shows the true earning power available to whoever runs the business.
Small businesses commonly change hands at a multiple of adjusted profit or SDE, often somewhere between two and four times for a stable, transferable firm, higher for businesses with strong recurring revenue and a management team in place. These ranges are indicative and vary by sector, size and risk. Treat any rule of thumb as a starting point for negotiation, not a fixed rate.
Add backs, legitimate and not
An add back is a cost put back into profit because it does not reflect how the business will run under new ownership. Legitimate add backs include the owner’s above-market salary, genuine one-off legal fees, personal expenses run through the company and the cost of a car the business does not need. Aggressive or false add backs include ongoing costs dressed up as one-offs, or “savings” that assume you sack half the staff. Scrutinise every add back and ask for evidence, because sellers inflate profit here to justify a higher price.
Owner dependence lowers the price
A business that depends entirely on the departing owner is worth less, sometimes dramatically less. If the owner holds every client relationship, all the technical knowledge and the supplier goodwill, much of what you are buying walks out of the door on completion day. Look for documented systems, a team that can operate without the owner, and customers who buy from the business rather than the person. Where dependence is high, structure the deal so the seller stays and gets paid over time, which the earn out section below covers.
Due diligence in three strands
Due diligence is the investigation you run before you commit. Treat it as three connected strands: financial, legal and commercial. The goal is simple. Confirm the business is what the seller says it is, and price the risks you find.
Financial due diligence
Compare the filed accounts at Companies House with the internal management accounts. You can pull any company’s filing history free from the Companies House register. Filed accounts are often abbreviated, so the management accounts and the actual bank statements tell you far more. Ask for at least three years.
Check the VAT returns against the sales figures and make sure they reconcile. Look hard at debtor concentration: if one customer owes most of the outstanding money, the business is exposed. Read the lease. A short remaining term, an imminent rent review or a personal guarantee can change the value of the whole deal. Building a rolling 13-week cash flow forecast from the real numbers tells you whether the business can fund itself after you take over.
Legal due diligence
Your solicitor confirms the seller owns what they are selling: title to property or a valid lease, ownership of equipment, and clear ownership of the brand, website, software and any intellectual property. Check who actually owns the IP, because logos and code built by freelancers can sit with the freelancer unless rights were assigned in writing.
Review all material contracts, any current or threatened disputes, and every licence or registration the business needs to trade legally. If the company holds data on customers, confirm it complies with UK GDPR, since a data problem becomes your problem. The Hims and Hers privacy case shows how promises about data can turn into liability, and that risk transfers with a share purchase.
Commercial due diligence
This is the strand buyers skip and later regret. Check customer concentration: if losing one or two clients would break the business, the price should reflect that. Read the supplier terms, because favourable pricing may be personal to the current owner and may not survive the sale. Assess staff retention: who is critical, are they staying, and what are they paid? If the business runs on a specific team, plan for how you keep them, and read our guide to the operations stack every sub-£1m business should know about to understand what systems you are inheriting or missing.
TUPE: what happens to the staff
TUPE stands for the Transfer of Undertakings (Protection of Employment) Regulations. In plain terms, when a business or part of it changes hands, the employees usually transfer to the new owner automatically, on their existing terms and with their continuous service intact. You cannot simply lower their pay or cut their conditions because you took over.
TUPE typically applies in an asset purchase where the business continues. In a share purchase it usually does not apply, because the employer, the company, has not changed; only its owner has. There are legal duties to inform and consult affected staff before the transfer, and getting this wrong can lead to claims. Read the government guidance on business transfers and TUPE and take advice early. If you plan to grow the team afterwards, our checklist for hiring in the UK covers the payroll and pension steps.
The legal documents, step by step
Heads of terms and exclusivity
Heads of terms set out the agreed price, the structure, the key conditions and the timetable. Most of it is not legally binding, but it aligns both sides before the legal costs start. Ask for a period of exclusivity, often four to eight weeks, during which the seller cannot negotiate with anyone else while you spend money on due diligence.
The purchase agreement, warranties and indemnities
The main contract is either a share purchase agreement or an asset purchase agreement, drafted by solicitors. Two clauses matter most to a buyer. Warranties are the seller’s formal statements that things are true, for example that the accounts are accurate and there are no undisclosed disputes; if a warranty proves false, you may claim damages. An indemnity is a promise to reimburse you pound for pound for a specific identified risk, such as an ongoing tax enquiry. Negotiate these carefully, because they are your protection when something surfaces after completion.
Retentions and earn outs
To keep the seller honest, hold part of the price back. A retention keeps a sum in a separate account for a set period to cover any warranty claims. An earn out pays part of the price later, based on the business hitting agreed profit or revenue targets after you take over. Earn outs are powerful where the business depends on the owner, because they tie the seller’s final payout to a smooth handover and continued performance.
How to fund the purchase
Few buyers pay all cash. Common routes combine several sources. Bank lending against the business or your assets is the traditional route, and lenders will want to see profit history and your plan. Seller financing, where the seller accepts part of the price over time, is common in small deals and signals the seller’s confidence in the business. Asset finance can release cash tied up in equipment or vehicles.
Government-backed options exist too. The British Business Bank supports smaller UK firms through various funding partners, which is worth checking alongside high street lenders. Whatever the mix, model the repayments against the real cash flow before you sign, not against the optimistic version.
The mistakes people actually make
- Trusting the headline profit. Buyers accept the seller’s adjusted figure without testing the add backs, then find the real profit is far lower.
- Ignoring owner dependence. The business works because of the owner, and it stalls the day they leave. Structure for a proper handover.
- Skipping commercial due diligence. The numbers look fine, but one customer is 60 per cent of sales, or the best supplier deal was a personal favour.
- Underestimating TUPE. Buyers forget staff transfer automatically in an asset deal, then hit the duty to consult and inherited terms.
- Cutting the solicitor to save money. A weak purchase agreement with thin warranties leaves you exposed the moment a hidden problem appears.
- No exclusivity. Spending on due diligence while the seller keeps talking to other buyers, then losing the deal at the last minute.
Frequently asked questions
How long does buying a business take?
For a typical owner-managed business, expect three to six months from accepted offer to completion. Simple asset deals with clean records move faster. Share purchases, property, or funding conditions add time. Delays usually come from due diligence throwing up issues that need renegotiating.
Do I need a solicitor to buy a business?
Yes. A solicitor drafts or reviews the purchase agreement, negotiates the warranties and indemnities that protect you, and handles the transfer of property and contracts. Use one who does business sales specifically, not general practice. Pairing them with an accountant for the financial due diligence is standard and worth the cost.
What deposit or exclusivity fee is normal?
Practice varies. Some deals involve a small exclusivity fee to compensate the seller for taking the business off the market, and some involve none. When a deposit is paid it is usually modest and refundable in defined circumstances. Any figure here is approximate and negotiable, so agree the terms in writing in the heads of terms.
Why do deals collapse?
The biggest reasons are due diligence uncovering something material, such as overstated profit or an undisclosed liability, funding falling through, the two sides failing to agree warranties, or the seller getting cold feet about leaving. Clear heads of terms, exclusivity and early funding conversations reduce the risk.
Should I buy assets or shares as a first-time buyer?
First-time buyers often prefer an asset purchase because it leaves most historic liabilities behind and is simpler to investigate. A share purchase can still be right where key contracts, leases or licences cannot transfer without consent, or where the tax position favours it. This is exactly the decision to take tax and legal advice on.
What to do next
- Define your target and budget. Decide the sector, size and location, and confirm what you can fund from savings, lending and seller financing before you view anything.
- Line up your advisers. Instruct a solicitor experienced in business sales and an accountant for financial due diligence, and agree fees in advance so costs do not surprise you.
- Verify before you value. Pull the filed accounts from Companies House, request three years of management accounts and VAT returns, and test every add back before you agree a price.
- Get it in writing. Sign heads of terms with an exclusivity period, then complete due diligence and negotiate the warranties, indemnities and any retention or earn out through your solicitor before you transfer a penny.
