How To Sell A Small Business In The UK: Legal Steps & Common Pitfalls

Selling a business is one of those “big moments” that can feel exciting and slightly overwhelming at the same time.

You’ve put time (and probably a lot of late nights) into building something valuable - and now you want to make sure you sell it properly, get paid on the right terms, and avoid nasty surprises after completion.

If you’re looking into how to sell a small business, the key thing to know is this: most sales don’t fall apart because the buyer changes their mind overnight. They fall apart because the legal foundations weren’t clear, the paperwork didn’t match what was promised, or important risks weren’t dealt with early.

Below, we’ll walk through the major legal steps and contracts you’ll typically deal with when selling a small business in the UK, plus the common pitfalls we see (and how to avoid them).

What Does Selling A Small Business Involve (Legally)?

When you sell a small business, you’re usually doing one of two things:

• Selling the assets of the business (an “asset sale”), or
• Selling the shares in the company that owns the business (a “share sale”).

Either way, you’re not just agreeing a price - you’re transferring risk, responsibility and (often) ongoing obligations. A well-run sale process usually includes:

• Heads of terms (to get the key commercial deal points agreed early)
• Due diligence (the buyer checks your business is what you say it is)
• Legal documents (sale agreement, disclosure letter, assignments/novations, and completion paperwork)
• Completion (money paid, documents signed, ownership transfers)
• Post-completion (handovers, transitional support, possible earn-out, and ongoing restrictions)

It’s also worth knowing that “selling” doesn’t always mean walking away on day one. Many buyers want:

• a handover period where you stay involved for a few weeks/months;
• an earn-out (part of the price paid later if targets are hit); and/or
• restrictive covenants to stop you setting up in direct competition straight away.

Getting these right is a big part of selling smoothly - and avoiding disputes after the sale.

Get Sale-Ready: Legal And Commercial Housekeeping

If you want a clean, confident sale (and ideally a better price), it’s worth preparing before you go to market - or at least before you accept an offer.

Buyers will usually scrutinise your business through due diligence, so your goal is to reduce “unknowns” and show you run a tight ship.

1) Confirm Who Owns What (And Put It In Writing)

Common issue: the business relies on key assets, but ownership is unclear. Examples include:

• the domain name being registered personally (not to the company);
• software/tools licensed under the founder’s personal account;
• equipment financed or leased in a way that restricts transfer; and
• branding or website content created by contractors without a clear IP assignment.

In an asset sale, you’ll need to transfer specific assets; in a share sale, the buyer inherits the company - including any gaps in ownership. Either way, tidy ownership is a big deal.

2) Check Your Contracts Are Assignable (Or Can Be Novated)

A buyer will care a lot about whether your customer/supplier relationships will continue after the sale.

Many commercial contracts include clauses that:

• ban assignment without consent;
• allow termination on a “change of control” (common in share sales); or
• require a formal transfer to a new party.

Where a contract needs to move to the buyer, you may need a Deed of Novation (to substitute the buyer into the contract) or a Deed of Assignment (to transfer rights, where permitted).

3) Sort Out Your People Issues Early

If you have staff, the sale process can quickly get complicated - especially if the buyer wants to retain employees or restructure after the acquisition.

As a seller, you should make sure you have:

• up-to-date Employment Contract documentation in place;
• clear records of pay, holiday and any commission/bonus arrangements;
• signed confidentiality obligations (particularly for key team members); and
• an understanding of whether TUPE may apply in an asset sale (more on this below).

Even if the buyer is taking on employees, they’ll want comfort that there are no hidden disputes, tribunal claims or unpaid entitlements sitting in the background.

4) Get Your Compliance Folder In Order

Buyers often request evidence that your business is compliant. While this varies by industry, common requests include:

• data protection documents (especially if you hold customer data);
• consumer terms, refund processes and complaint handling (if you sell to consumers);
• licences/permits relevant to your operations; and
• health and safety policies for workplace-based businesses.

If you operate online, it’s normal for buyers to ask to see your Privacy Policy and cookie compliance approach, because UK GDPR and the Data Protection Act 2018 can create real liability if personal data has been handled poorly.

It can feel like a lot - but the upside is that good housekeeping reduces buyer leverage to chip away at price late in the process.

Choose Your Deal Structure: Asset Sale Vs Share Sale (And Why It Matters)

One of the biggest legal decisions in selling a small business is whether the buyer is acquiring:

• assets (asset sale), or
• shares (share sale).

This isn’t just “legal wording” - it affects tax, liability, employees, contracts, and how the handover works. (Tax outcomes are highly fact-specific, so it’s worth speaking to an accountant or tax adviser early.)

Asset Sale: What It Usually Means

In an asset sale, the buyer purchases an agreed list of assets, such as:

• stock and equipment;
• intellectual property (brand name, website, software, content);
• customer contracts (if transferable);
• supplier agreements (if transferable);
• goodwill; and
• sometimes employees (often via TUPE).

Benefits (often from the buyer’s perspective) can include choosing what they do and don’t take on. But for you as the seller, a common risk is assuming “everything transfers automatically” - when in reality, many items need separate steps (like assignments, novations and consents).

TUPE note: in an asset sale, the Transfer of Undertakings (Protection of Employment) Regulations 2006 (TUPE) may apply, which can mean employees transfer to the buyer on their existing terms. This area can be technical, so it’s worth getting advice early if staff are involved.

Share Sale: What It Usually Means

In a share sale, the buyer buys your shares in the company.

The company keeps owning the assets and contracts - so you’re effectively transferring the “whole package”, including liabilities (known and unknown) that sit inside the company.

From a seller’s perspective, share sales can be simpler operationally (fewer transfers), but buyers tend to demand:

• more detailed warranties;
• a thorough disclosure process; and
• often a retention/escrow or price adjustment mechanisms if they’re nervous about risk.

If your business is owned by multiple shareholders, make sure your internal documents support a sale pathway (for example, drag/tag rights and decision-making rules in a Shareholders Agreement). Without this, you can end up with last-minute internal disputes that delay or derail the deal.

The Contracts You’ll Need To Sell A Small Business (And What They Do)

When people search for information on how to sell a small business, they often focus on valuation and finding a buyer. But once you have a buyer, the contracts are what turn “we agree” into “we completed”.

Here are the key documents you’ll typically see in a UK small business sale.

Heads Of Terms (Or Letter Of Intent)

Heads of terms usually set out the key agreed deal points, such as:

• price and payment structure (including any earn-out);
• what’s included in the sale (assets vs shares);
• exclusivity period (so you don’t keep shopping the deal around);
• timelines and conditions (for example, finance approval); and
• confidentiality.

Heads of terms are often mostly “non-binding”, but certain parts (like confidentiality and exclusivity) are commonly binding. It’s important that you understand what you’re locking yourself into, and what you’re not.

Confidentiality Agreement (NDA)

Before you share sensitive business information (financials, customer lists, supplier pricing), you’ll typically want an NDA in place.

This helps reduce the risk of:

• your competitor using the “buyer conversation” to collect intel;
• staff/contractors finding out prematurely; or
• confidential information being disclosed to third parties.

Due Diligence Pack

Due diligence is the buyer’s chance to verify what they’re buying. From your side, being organised speeds up the process and builds trust.

Depending on the size of the deal, it can help to prepare a structured Legal Due Diligence Package so the buyer can review the information efficiently (and so you’re not scrambling to pull documents together at the last minute).

Business Sale Agreement (Asset Sale) Or Share Sale Agreement (Share Sale)

This is the main contract that documents what is being sold, on what terms, and who carries which risks.

For an asset deal, your core document is usually a Business Sale Agreement. For a share deal, it’s typically a share purchase agreement.

Key clauses you’ll usually negotiate include:

• Purchase price mechanics: fixed price vs completion accounts, plus any working capital adjustments.
• Payment terms: upfront payment, deferred consideration, earn-out, or vendor loan notes.
• Warranties: promises you make about the business (contracts, compliance, litigation, IP ownership, accounts).
• Indemnities: specific “if this happens, you pay” obligations (often used for known issues).
• Limitations on liability: caps, time limits, and exclusions to keep your risk proportionate.
• Restraints / restrictive covenants: non-compete, non-solicit, non-poaching (these need to be reasonable to be enforceable).
• Conditions precedent: consents, finance approval, landlord approval, or regulatory approvals that must happen before completion.

One practical point: warranties and indemnities are where sellers often underestimate ongoing risk. Even after completion, a buyer may have a contractual right to bring a claim if warranties were breached - so you want these clauses drafted clearly and fairly.

Disclosure Letter

In many deals (especially share sales), you’ll provide a disclosure letter. This is where you disclose exceptions to the warranties.

For example, if you warrant “there is no litigation”, but you have a threatened dispute with a supplier, the disclosure letter is where that is recorded (so the buyer can’t claim later that you “hid” it).

Done properly, disclosure is one of your best tools to reduce post-sale liability.

Assignments, Novations And IP Transfers

To actually transfer what’s being sold, you may need extra documents, such as:

• assignments of IP (trade marks, copyright, domain names);
• novation of key contracts that can’t simply be assigned; and
• fresh customer agreements if the buyer wants to contract on new terms.

These aren’t “nice to haves” - if you don’t transfer key assets properly, the buyer may argue you haven’t delivered what they paid for.

Completion Documents And Checklists

Completion is the moment the deal actually happens - funds are paid and ownership transfers. There are usually multiple moving parts (bank transfers, board minutes, share transfers, resignations/appointments, asset transfer documents, releases).

A Completion Checklist is a practical way to reduce “completion day chaos” and make sure nothing essential is missed.

Common Pitfalls When Selling A Small Business (And How To Avoid Them)

Even well-run businesses can get caught out during a sale. Here are some of the most common pitfalls - and what you can do to avoid them.

Pitfall 1: Waiting Too Long To Get Legal Advice

It’s tempting to “agree the deal first” and worry about legals later.

But the legal structure is part of the deal. If you wait until the buyer’s lawyers send a 50-page agreement, you may find the buyer has already anchored expectations on warranties, payment terms, restraints and risk allocation.

How to avoid it: as soon as negotiations become serious (or ideally before you go to market), map out your preferred structure and red lines.

Pitfall 2: Not Understanding What You’re Promising In Warranties

Warranties are not just “standard boilerplate”. They’re contractual promises about the business.

If a warranty is untrue (even innocently), the buyer may have a claim. This can come as a shock to sellers who feel the deal is “done” once funds clear.

How to avoid it: keep warranties specific, qualify them where appropriate (for example, by knowledge), disclose issues properly, and negotiate sensible liability limits.

Pitfall 3: “Handshake Deals” For Deferred Payments Or Earn-Outs

Deferred consideration and earn-outs can work well - but only if the calculation and control mechanics are crystal clear.

Common earn-out disputes arise because:

• targets are vague (“increase revenue”);
• the buyer can change pricing/cost allocations that affect profit; or
• there’s no clear reporting and dispute resolution process.

How to avoid it: document exactly how the earn-out is measured, who controls decisions, what information you’ll receive, and how disputes will be handled.

Pitfall 4: Forgetting About Landlord Consent Or Lease Transfer Issues

If your business operates from leased premises, the lease can be one of the biggest “hidden” deal blockers.

Some leases require:

• landlord consent to assign the lease;
• guarantees from you even after assignment; and/or
• a new lease instead of an assignment.

How to avoid it: check the lease early and, if needed, start landlord discussions well before completion. Delays here can derail timing.

Pitfall 5: Employee Transfers And TUPE Being An Afterthought

In many asset sales, TUPE can apply and create obligations around employee transfer, consultation and preserving terms and conditions.

How to avoid it: identify early whether TUPE may apply, plan communications carefully, and make sure your sale documents reflect the correct approach to employee liabilities.

Pitfall 6: Not Being Clear On What “Selling The Business” Includes

Buyers and sellers sometimes assume different things are “included” - for example:

• social media accounts;
• customer databases and mailing lists;
• phone numbers;
• websites and domains;
• trade marks and brand assets;
• stock at valuation date; and
• work in progress (particularly for service businesses).

How to avoid it: use schedules and a clear asset list, and make sure the agreement matches what was discussed commercially.

Key Takeaways

• Selling a small business usually involves either an asset sale or a share sale, and the structure you choose affects liability, contracts, employees and the transfer process.
• Before you accept an offer, get “sale-ready” by tidying ownership of assets, checking whether contracts are assignable/novatable, and organising compliance and business records.
• The key sale documents typically include heads of terms, an NDA, due diligence materials, a sale agreement, disclosures, and completion documentation.
• Warranties, indemnities and limitation clauses are not just formalities - they can create ongoing liability for you after completion if not negotiated carefully.
• Common pitfalls include unclear earn-out terms, forgetting landlord consent/lease issues, underestimating TUPE and employee obligations, and failing to properly transfer key assets like IP and domain names.
• If you want the best chance of a smooth sale (and fewer post-sale headaches), it’s worth getting legal advice early and documenting the deal properly rather than relying on templates or assumptions.

Important: This article is general information only and isn’t legal or tax advice. Every sale is different, so you should get advice for your specific circumstances.

If you’d like help selling your business (or you’re not sure which deal structure fits your situation), you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.