How To Sell Your Business In The UK: Key Legal Steps

Selling a business is a big milestone. For many founders, it’s the moment where years of late nights, product iterations and customer wins finally translate into a tangible outcome.

But when you’re selling a business (especially a small company or startup), it’s not just about finding a buyer and agreeing a price. The legal steps you take before and during the deal can affect:

• how much you actually receive at completion (and what gets held back);
• how long the deal takes;
• whether the buyer chips away at price during due diligence; and
• your risk after you’ve “sold” (yes, you can still face claims post-sale if the paperwork isn’t right).

Below, we walk you through the key legal steps for selling your business in the UK, in plain English, and with a small business lens. If you’re asking “how do you sell a business?” or “how to sell your business UK?”, this is the legal roadmap you want to have on your side.

Is Your Business Actually Ready To Sell?

Before you get into negotiations, take a breath and sanity-check whether your business is “sale-ready”. This isn’t about perfection (buyers expect some messiness). It’s about removing the common red flags that slow down a sale or reduce price.

1) Confirm What You’re Selling (And What The Buyer Thinks They’re Buying)

When founders say they’re selling a business, they often mean “I’m selling the whole thing”. But legally, “the whole thing” can mean different bundles of assets and liabilities.

Start by listing what makes your business valuable, for example:

• brand name and goodwill;
• customer contracts and recurring revenue;
• software code, product designs, content and data;
• stock, equipment, domain names and social accounts;
• key employees and contractor relationships; and
• licences, permits and supplier arrangements.

This list helps you spot gaps early (for example, if your key IP is still owned by a contractor personally, or key customer contracts can’t be transferred without consent).

2) Get Your House In Order: Company Records And Ownership

If you’re selling a company (rather than just selling specific assets), buyers will want comfort that your ownership and governance are clean.

Common “sale-readiness” items include:

• up-to-date Companies House filings;
• accurate statutory registers (members, PSCs, directors);
• clear share ownership and option/grant records (if you have them); and
• signed founder arrangements and IP ownership clarity.

If you have more than one shareholder, it’s worth checking what your Shareholders Agreement says about sale processes, drag/tag rights, approvals and restrictions. These clauses can materially shape what you’re allowed to do (and how quickly).

3) Identify Any Deal-Blocking Issues Early

Some issues don’t just “reduce price” - they can stop a buyer entirely, or force last-minute restructuring. Examples include:

• unresolved IP ownership (especially common with early-stage startups and freelancers);
• contracts that can’t be assigned or terminate automatically on a “change of control”;
• key regulatory approvals or licences missing;
• disputes with customers, suppliers, co-founders or ex-employees; and
• unclear employment status (e.g. contractors who might really be workers/employees).

You don’t need to solve everything alone, but knowing what’s there helps you choose the right strategy and avoid surprises when the buyer’s lawyers start asking questions.

How Do You Structure The Sale? (Share Sale Vs Asset Sale)

One of the biggest legal decisions when selling a business in the UK is the deal structure. Most small business sales are either:

• a share sale (you sell the shares in your limited company), or
• an asset sale (the company sells business assets to the buyer).

There isn’t a single “best” option. It depends on risk, tax and accounting treatment, liabilities and what the buyer wants. It’s a good idea to speak to a lawyer and an accountant/tax adviser early so the structure matches your commercial goals.

Share Sale (Selling The Company)

In a share sale, the buyer purchases your shares and takes over the company “as is”, including its assets and liabilities (known and unknown).

This structure is often attractive because:

• the business can keep operating in the same legal entity;
• customer/supplier contracts may not need assignment (though watch for change-of-control clauses); and
• it can be simpler operationally at completion.

However, because the buyer inherits liabilities, they’ll typically push harder on warranties, indemnities, disclosures, retention/escrow and post-completion protections.

Share deals are usually documented with a Share Sale Agreement (plus disclosure letter and supporting documents).

Asset Sale (Selling The Business Assets)

In an asset sale, the buyer purchases selected assets (and sometimes specific liabilities) from your company.

Asset sales can be helpful where:

• the buyer only wants parts of the business (e.g. brand + customer base);
• there are historic liabilities you don’t want the buyer inheriting; or
• the business has been run informally and needs a “clean break”.

But asset sales can involve more moving parts, such as assigning contracts, transferring IP, dealing with employees (including potential TUPE considerations), and transferring domain names and licences.

Asset sales are often documented with a Business Sale Agreement.

Heads Of Terms: The “Deal Outline” That Sets The Tone

Once you’ve found a serious buyer, you’ll usually agree heads of terms (also called a term sheet or letter of intent). This isn’t the final contract, but it’s important because it frames the whole negotiation.

Heads of terms commonly cover:

• price and payment structure (cash, deferred, earn-out);
• what’s included/excluded;
• timelines and key conditions;
• exclusivity (whether you can talk to other buyers);
• confidentiality; and
• who pays legal and advisory costs.

Even when most provisions are “non-binding”, exclusivity and confidentiality often are binding - so it’s worth getting the wording right before you sign anything.

What Legal Documents Do You Need When Selling A Business?

If you’re wondering how to sell your business (or how to sell your company) without getting stuck in endless back-and-forth, your documentation matters. The right documents keep the deal moving and reduce misunderstandings.

1) The Main Sale Agreement

This is the core contract that sets out what’s being sold, on what terms, and what happens if something goes wrong. It will also include the “legal mechanics” for completion.

Depending on the structure, this is typically either a share sale agreement or a business/asset sale agreement (as mentioned above).

2) Confidentiality Agreement (NDA)

Before you disclose sensitive financials, customer lists, pricing, IP details or trade secrets, you should have an NDA in place. This is particularly important where you’re speaking to multiple potential buyers or where a buyer is also a competitor.

An NDA won’t solve everything (enforcement is never as easy as we’d like), but it sets clear rules around use, disclosure, and returning/destroying information.

3) Disclosure Letter (Especially For Share Sales)

In many share sales, sellers give warranties (promises) about the business, such as that accounts are accurate, there are no undisclosed disputes, and IP is owned by the company.

The disclosure letter is where you qualify those promises by “disclosing” exceptions (for example, an ongoing customer complaint or a historic tax query). Done well, disclosures reduce your risk of a post-sale claim.

4) Employment And Management Arrangements

Many deals include an expectation that founders will stay on for a handover period, consultancy, or earn-out management phase.

This is where it’s smart to document the arrangement clearly (role, scope, pay, termination rights, IP, confidentiality and restraints). If new or updated roles are required, an Employment Contract (or consultancy agreement) can help avoid misunderstandings when expectations are high and timelines are tight.

5) Transfer Documents (Assignments, Novations, Consents)

When selling a business via an asset sale, you’ll often need to move contracts across to the buyer. Legally, that usually means:

• assignment (transfer of benefits, where permitted), or
• novation (transfer of both rights and obligations, usually requiring the other party’s consent).

In some cases, you may need a Deed of Novation to properly move customer or supplier contracts over to the buyer, particularly where the buyer needs to “step into” your obligations.

What Will A Buyer Investigate? (Due Diligence Checklist)

Due diligence is the buyer’s process of verifying what you’ve told them and identifying risks. If you’re selling a small business in the UK, expect due diligence to feel intense - even for a modest deal size.

The best way to keep control is to anticipate the questions and prepare your data room early.

Company And Corporate Due Diligence

Buyers will typically ask for:

• company structure chart (if there are multiple entities);
• share capital, option schemes, shareholder loans and convertible instruments;
• constitutional documents and resolutions; and
• evidence you have authority to sell (board/shareholder approvals).

Contracts, Revenue And Commercial Terms

Expect requests for:

• top customer contracts and renewal terms;
• supplier and partner agreements;
• terms and conditions used with customers;
• refund, cancellation and warranty approaches (particularly for consumer-facing businesses under the Consumer Rights Act 2015); and
• any disputes or claims history.

If your revenue depends on a few key contracts, the buyer will want to see stability (term remaining, termination rights, and change-of-control triggers).

People, Employment And TUPE Considerations

If your business has employees, the buyer will review:

• contracts, pay, benefits and bonus/commission arrangements;
• holiday records and policies;
• any grievances, disciplinaries or tribunal threats; and
• contractor status and IR35-type risk indicators (where relevant).

In an asset sale, you should also consider whether the Transfer of Undertakings (Protection of Employment) Regulations 2006 (TUPE) might apply. TUPE can transfer employees (and their rights) to the buyer automatically in certain business transfer situations, and it comes with information and consultation obligations.

Intellectual Property (Often The Biggest Startup Value Driver)

For startups, IP is often the deal. Buyers commonly ask:

• who created the code/content/designs and when;
• whether contractors assigned IP properly;
• trade mark registrations (or plans to register); and
• open-source software use and compliance.

If ownership is unclear, you may need to tighten it before completion. In many cases, an IP Assignment is a practical way to ensure the company (not an individual or freelancer) owns what the buyer is paying for.

Data Protection And Customer Data

If your business holds customer or user data, the buyer will look closely at your compliance with UK GDPR and the Data Protection Act 2018. This is especially true if your product is digital, subscription-based, or uses marketing automation.

Make sure you can show:

• what personal data you collect and why;
• your lawful basis for processing;
• retention and deletion approach; and
• contracts with processors (e.g. hosting, email tools) where needed.

Having a clear Privacy Policy and internal practices that match it can make due diligence much smoother (and reduce the buyer’s argument that “we need a big retention to cover compliance risk”).

If due diligence feels overwhelming, that’s normal. The goal isn’t to have a “perfect” business - it’s to be transparent and to document risk properly so you’re not carrying it alone after completion.

How Does Completion Work, And What Happens After You Sell?

Once the main agreements are negotiated, you’ll usually move into signing and completion mechanics. This stage is where deals can wobble if the checklist isn’t managed properly.

Completion Conditions And Pre-Completion Steps

Common pre-completion requirements include:

• getting third-party consents (landlord, key customers, lenders);
• repaying or restructuring director loans;
• agreeing how cash/debt is treated (common in share sales, and often linked to the pricing/accounting mechanics);
• employee communications (and TUPE steps, if relevant); and
• signing ancillary documents (assignments, novations, resignations).

It helps to run a structured Completion Checklist so everyone is aligned on what needs to happen, when, and who owns each action.

Price Mechanics: Retentions, Escrow And Earn-Outs

Small company and startup exits often involve something other than a simple “cash on completion” payment. You might see:

• retention (buyer holds back part of the price for a period);
• escrow (funds held by a third party under agreed release rules);
• deferred consideration (paid later, sometimes conditional); and
• earn-out (additional payments based on performance after sale).

These aren’t inherently “bad”, but they need careful drafting. The definitions and measurement periods matter a lot - especially with earn-outs, where disagreements can arise around budgets, decision-making and what counts as revenue.

Post-Sale Restrictions And Your Next Steps

Buyers often ask sellers to agree to restraints, such as:

• non-compete (not starting a competing business for a period);
• non-solicitation (not approaching customers/suppliers); and
• non-poaching (not hiring former staff).

These clauses need to be reasonable and tailored. Overly broad restraints can be unenforceable, but you also don’t want to sign something that blocks your next move more than necessary.

Finally, even after selling your business, you may have ongoing obligations under the sale agreement (for example, assisting with transitional matters or responding to warranty claims). Having everything properly documented reduces the likelihood of disputes later.

Key Takeaways

• Selling a business involves legal steps as well as commercial negotiation - getting your structure and documents right can help protect the price and reduce post-sale risk.
• Work out whether a share sale or asset sale fits your situation, because this affects liabilities, contract transfers, employees and the sale documentation.
• Get sale-ready early by cleaning up company records, confirming ownership (especially IP), and identifying contracts that require consent or have change-of-control clauses.
• Expect buyer due diligence across corporate records, customer/supplier contracts, employment, IP, and data protection (UK GDPR/Data Protection Act 2018).
• Don’t underestimate completion mechanics - a clear completion checklist and properly drafted transfer documents help avoid last-minute delays.
• Be careful with deferred payments and earn-outs, because unclear definitions can lead to disputes long after you thought the deal was “done”.

Important: This article is general information only and doesn’t constitute legal or tax advice. Every business sale is different, so it’s worth getting advice on your specific deal (including from a tax adviser/accountant on the tax treatment of the structure and consideration).

If you’d like help selling a business (or you’re not sure whether you’re selling shares or selling assets), you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.