How to Purchase a Business in the UK: A 2026 Step-by-Step Guide
Buying an existing business can be faster than starting one from scratch — you inherit customers, cash flow, staff and systems on day one. But it also means inheriting whatever’s wrong with it, which is exactly why due diligence exists.
This guide covers how to purchase a business in the UK from start to finish: finding the right target, valuing it properly, funding the deal, and — often overlooked by legal-focused guides — the real tax difference between buying assets and buying shares, which can change your effective cost significantly.
Key Takeaways
- Buying an established business gets you day-one revenue, existing customers, trained staff and proven systems — but you inherit whatever problems come with them too.
- Due diligence — financial, legal, tax, employment and commercial — is the single most important step, and rushing it is the most common costly mistake.
- An asset purchase lets you cherry-pick what you buy and claim capital allowances; a share purchase takes on the whole company, including its history and liabilities.
- Share purchases attract 0.5% Stamp Duty; asset purchases can trigger Stamp Duty Land Tax on any property and VAT unless the deal qualifies as a transfer of a going concern.
- Sellers often prefer share sales because of Business Asset Disposal Relief, which can reduce Capital Gains Tax to 10% on qualifying gains up to £1 million.
- Banks generally lend more readily against an established business with 2–3 years of accounts than against a new start-up idea.
Table of Contents
- Why Buy an Existing Business?
- The Business Buying Process, Step by Step
- Due Diligence: What to Actually Check
- Asset Purchase vs Share Purchase: The Tax Difference
- Funding Your Purchase
- Common Challenges When Buying an Established Business
- Illustrative Examples
- Common Mistakes to Avoid
- Asset or Share Purchase? Decision Framework
- What Does Professional Support Cost?
- Business Purchase Checklist
- FAQs
Why Buy an Existing Business?
Buying an established business gives you immediate revenue, existing customers, trained staff and working systems — advantages a start-up takes years to build. It’s also generally easier to finance, since lenders can assess real trading history rather than a projection.
The trade-off is that you’re also buying the business’s problems: shaky contracts, underlying tax liabilities, an over-reliance on the current owner, or a reputation that needs repairing. This is exactly what due diligence exists to uncover before you commit.
The Business Buying Process, Step by Step
Buying a business in the UK typically follows seven stages: define what you want, find and value a target, agree heads of terms, complete due diligence, arrange finance, negotiate the sale agreement, then complete.
- Decide what type of business, sector and size fits your budget and skills.
- Search for suitable businesses for sale and shortlist realistic options.
- Agree a price and “heads of terms” — non-binding, but sets the framework for negotiation.
- Sign a non-disclosure agreement so you can access the seller’s financial and commercial information.
- Carry out full due diligence (see below).
- Arrange finance based on what due diligence confirms.
- Negotiate the final sale agreement, warranties and indemnities, then complete.
Due Diligence: What to Actually Check
Due diligence means independently verifying the business’s financial, legal, tax, employment and commercial position before the deal becomes binding — treating the seller’s figures as a starting point, not confirmed fact.
- Financial: Reconcile claimed revenue against bank statements, VAT returns and accounting records — not just the management accounts you’re shown.
- Legal: Confirm the business legally owns what it’s selling, and check for any pending litigation or regulatory issues.
- Tax: Identify any outstanding tax liabilities, distinguishing between figures the seller states and those independently confirmed.
- Employment: Understand TUPE implications — employees generally transfer automatically with an asset purchase, with their existing terms protected.
- Commercial: Check how dependent revenue is on the current owner, one major customer, or a contract that could be cancelled on a change of ownership.
Asset Purchase vs Share Purchase: The Tax Difference
In an asset purchase you buy specific assets from the company (and can claim capital allowances on them, without inheriting historic liabilities); in a share purchase you buy the company itself, including everything it owns and owes, and the seller usually gets a better tax outcome. This is the deal-structuring decision most buying guides gloss over — and it can meaningfully change your real cost.
| Asset Purchase | Share Purchase | |
|---|---|---|
| What you buy | Specific chosen assets | The whole company, including liabilities |
| Buyer’s stamp duty | None on the assets (SDLT applies to any property) | 0.5% Stamp Duty on the share price |
| Capital allowances | Buyer can claim on qualifying assets | Not available to the buyer |
| VAT | May apply, unless it qualifies as a transfer of a going concern | Generally VAT-exempt |
| Inherited liabilities | Only what’s explicitly agreed | All historic liabilities transfer with the company |
| Seller’s tax position | Can trigger a “double” tax charge (company, then shareholders) | Often eligible for Business Asset Disposal Relief (10% CGT) |
Funding Your Purchase
Business acquisitions are commonly funded through a mix of bank finance, seller financing (where part of the price is paid over time from future profits), and the buyer’s own capital. Lenders generally favour acquisitions with 2–3 years of verified trading history over new business propositions, since the risk is easier to assess.
Common Challenges When Buying an Established Business
- Revenue that depends heavily on the outgoing owner’s personal relationships
- Contracts that can be cancelled the moment ownership changes
- Underlying tax liabilities that only surface during proper due diligence
- Underestimating the working capital needed to keep trading smoothly post-completion
- Rushing the process to avoid losing the deal, at the expense of thorough checks
Illustrative Examples
Illustrative Example — Asset Purchase: A buyer acquires the equipment, stock and customer list of a café, but not the limited company that ran it — avoiding any historic tax liabilities the previous owner’s company may have carried.
Illustrative Example — Share Purchase: A buyer acquires 100% of the shares in an established IT consultancy, inheriting its existing contracts, staff and trading history intact, in exchange for taking on its liabilities too.
Illustrative Example — Due Diligence Catching a Problem: During financial due diligence, a buyer discovers that 40% of a target’s revenue comes from a single client whose contract can be cancelled with 30 days’ notice — reshaping the negotiation entirely.
Common Mistakes to Avoid
| Mistake | Why It Happens | Consequence | How to Avoid It |
|---|---|---|---|
| Skipping proper due diligence | Trusting the seller’s figures at face value | Inheriting hidden debts or overstated revenue | Independently verify against bank statements and tax records |
| Ignoring the asset vs share decision | Assuming it’s a legal technicality | A materially worse tax outcome than necessary | Get accountant advice on structure before agreeing heads of terms |
| Underestimating working capital needs | Focusing only on the purchase price | Cash flow trouble immediately after completion | Model working capital needs separately from the acquisition cost |
| Not checking key-person dependency | Assuming operations will continue unchanged | Revenue drops sharply once the previous owner leaves | Assess how much the business relies on the seller personally |
| Rushing to avoid losing the deal | Fear of a competing buyer | Missing a problem that surfaces after completion | Set a realistic due diligence timeline and stick to it |
Editor’s Insights
- The asking price is a negotiating position, not a valuation — always sense-check it against the business’s actual verified profit.
- Employees generally transfer automatically under TUPE in an asset purchase, with their existing terms and continuity of employment protected.
- A share purchase inherits the company’s full history — including tax enquiries that predate your ownership.
- Sellers offering financing (accepting part of the price over time) can be a useful signal of their confidence in the business’s future performance.
- Get your accountant involved before you agree heads of terms, not after — the deal structure decision is much harder to unwind later.
Asset or Share Purchase? Decision Framework
- Do you want to avoid inheriting historic liabilities? An asset purchase gives you more control over exactly what you take on.
- Do you want to claim capital allowances on what you buy? Only available through an asset purchase.
- Is continuity of existing contracts and relationships critical? A share purchase keeps the company (and its agreements) intact.
- Is the seller pushing hard for a share sale? Understand why — it’s usually because it’s more tax-efficient for them, which is worth factoring into price negotiations.
What Does Professional Support Cost?
Typical UK market ranges for professional support on a small business acquisition:
Accountant Due Diligence
£1,000–£3,000+
Financial review, tax position check, and deal-structure advice.
Legal Due Diligence
£2,000–£6,000+
Contract review, sale agreement drafting, and completion support.
Business Valuation
£500–£2,500+
Independent assessment of what the business is realistically worth.
Costs scale with deal size and complexity. For ongoing accounting support after completion, see our accountant cost guide.
Business Purchase Checklist
- ☐ Define your budget, sector and the skills you actually bring
- ☐ Sign an NDA before requesting detailed financial information
- ☐ Complete financial, legal, tax, employment and commercial due diligence
- ☐ Decide asset vs share purchase with your accountant, before finalising heads of terms
- ☐ Model working capital needs separately from the headline purchase price
- ☐ Confirm financing is secured before you commit to a completion date
Frequently Asked Questions
How do I purchase a business in the UK?
You typically define what you’re looking for, find and value a target, agree heads of terms, complete due diligence, arrange finance, and negotiate a sale agreement structured as either an asset or share purchase.
What’s the difference between an asset purchase and a share purchase?
An asset purchase buys specific chosen assets without inheriting the company’s historic liabilities; a share purchase buys the whole company, including everything it owns and owes.
How much stamp duty do I pay when buying a business?
Share purchases attract 0.5% Stamp Duty on the share price. Asset purchases don’t attract Stamp Duty on the assets themselves, though Stamp Duty Land Tax applies to any property included.
Do employees transfer automatically when a business is sold?
Generally yes, under TUPE regulations, particularly in asset purchases — employees keep their existing terms and continuity of employment.
Is buying an established business better than starting one from scratch?
It depends on your goals — buying gets you day-one revenue and existing infrastructure, but you inherit the business’s existing problems too; starting fresh gives full control but takes longer to become profitable.
How long does due diligence usually take?
It varies with deal complexity, but a realistic timeline is several weeks to a few months for a small business acquisition — rushing it is one of the most common costly mistakes.
Can I get a business loan to buy an existing business?
Yes — lenders often prefer financing an established business with verified trading history over a new start-up, though you’ll still need to demonstrate the deal’s viability.
Sources & References
- GOV.UK — Stamp Duty Reserve Tax and Stamp Duty Land Tax guidance
- GOV.UK — Business Asset Disposal Relief
- GOV.UK — TUPE (Transfer of Undertakings) regulations
- HMRC — VAT and transfer of a going concern (TOGC) guidance
About the Author
Written and reviewed by the Epiclectic Editorial Team. Epiclectic is an independent UK publication owned by Eternity Accountants Limited, publishing practical, fact-checked guides across accounting, business, home & living, gardening, travel, sustainability and wellness.
Editorial standards: original research, fact-checking against official sources, and regular review.
Last reviewed: September 2026
Related Guides
- Different Types of Business Structures in the UK
- How to Register a Business in the UK
- Small Business Tax UK: The Complete 2026/27 Guide
- How to Find an Accountant: Expert UK Guide 2026
- Explore more Business guides
In Summary
Buying a business can be one of the fastest ways into UK entrepreneurship — but the deal structure you choose matters just as much as the business you pick. Get due diligence right, understand the asset-versus-share trade-off before you negotiate terms, and bring your accountant in early rather than after the heads of terms are signed.
If you’re weighing this up against starting from scratch, our guide to UK business structures is a useful next read — or explore more Business guides on Epiclectic.
