Insights
Insights
Practical articles on UK demergers: choosing a route, HMRC clearances, capital gains tax, stamp duty and SDLT, and splitting property from trade.
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Guides by topic
Demerger routes
4 guides
Statutory, capital reduction, liquidation and partition demergers, and how to choose between them.
Explore guidesHMRC clearances
4 guides
Which clearances a demerger needs, what HMRC looks for, and the rules they protect against.
Explore guidesProperty and stamp taxes
3 guides
Separating property, SDLT and stamp duty reliefs, and the clawbacks that can follow.
Explore guidesPlanning, sales and reliefs
3 guides
Demerging before a sale, BADR and other reliefs, and what the rules say about what happens next.
Explore guides
Latest
Latest guides
Demerger routes ·
Capital reduction or liquidation demerger? How to choose
Capital reduction and liquidation demergers can both split a company tax neutrally. How they differ on cost, reserves, timing and risk, and how to choose.
ReadPlanning and sales ·
Demergers and Business Asset Disposal Relief
A demerger can protect or put at risk Business Asset Disposal Relief on a later sale. Holding periods, trading status and separating investment assets.
ReadFor accountants ·
A demerger checklist for accountants
A practical demerger checklist for accountants: the information to gather, the red flags to spot early, and when to bring in a demerger tax specialist.
ReadDemerger routes ·
Seven demerger mistakes that create a tax bill
Most demerger tax bills come from avoidable mistakes: the wrong route, steps out of order, missed clawbacks. Seven to watch for and how to avoid them.
ReadProperty and stamp taxes ·
Moving property in a demerger: the SDLT traps
SDLT can turn a tax-neutral demerger into a large bill. Group relief clawback, reconstruction and acquisition relief conditions, and Wales and Scotland.
ReadLegislation update ·
Finance Act 2026: the new anti-avoidance test for reconstructions
Finance Act 2026 replaced the bona fide commercial reasons test in s137 and s139 TCGA with a main purpose test from 26 November 2025. What it means.
ReadDemerger routes ·
The five-year rule after a statutory demerger
After a statutory demerger, some payments to shareholders within five years are taxed as income. What a chargeable payment is and what it means for a sale.
ReadHMRC clearances ·
What HMRC looks for in a demerger clearance
HMRC clearance gives certainty before a demerger. What HMRC needs to see, why commercial reasons matter, and the issues that most often prompt questions.
Read
FAQs
Frequently asked questions
What topics do your demerger articles cover?
They cover the tax side of splitting UK companies and groups. Topics include choosing between capital reduction, liquidation, statutory and partition demergers, HMRC clearances, capital gains tax and corporation tax, stamp duty and SDLT reliefs, distributions, and situations such as separating property from a trading business or preparing for a sale.
Who are the articles written for?
Owners of UK private companies, and the accountants, solicitors and wealth managers who advise them. They're written in plain English and explain any technical terms, so you don't need a tax background to follow them. Our glossary explains the terms you're likely to meet. Each article focuses on one question, so you can read only what's relevant to you.
Can I rely on an article for my own demerger?
No. The articles are general information, not advice. Whether a demerger works without a tax charge depends on the facts, the conditions for each relief and the anti-avoidance rules, and tax law changes. Speak to an adviser about your own position before taking any step. Taking a step too early can lose a relief.
How up to date are the articles?
Each article is dated, so you can see when it was published or last reviewed. Demerger law changes from time to time, including through Finance Acts that adjust anti-avoidance rules, so check the date and take advice on the current position before acting on anything you read. We update articles when the law changes.
Where should I start if I'm new to demergers?
Start with our demerger tax advice page, which explains the main routes and when each is used, then try the demerger route finder. Our free guide, 'Demergers: the owner's tax guide', brings the main points together. The articles then look at individual issues in more depth. The glossary helps with any unfamiliar terms.
Why do owners usually look into demergers?
Common reasons include separating property from a trading company, so it's protected from the risks of the trade or kept when the business is sold; shareholders wanting to go their separate ways; preparing one business for sale; and family succession. Each points towards different routes, which our articles explain. Some owners have more than one reason.
Do you write about HMRC clearances?
Yes. Most demergers rely on one or more HMRC clearances, such as under section 138 TCGA 1992, section 701 ITA 2007 or section 1091 CTA 2010. Our articles explain what each clearance covers, when it's needed and how long HMRC usually takes, without turning into a drafting manual. We also explain what HMRC expects to see.
Do the articles cover stamp duty and SDLT?
Yes. Moving shares or property between companies can trigger stamp duty or stamp duty land tax, and the reliefs for reconstructions and group transfers have strict conditions and clawback rules. We explain how they work in plain English and where the common traps are. Stamp taxes are often the largest potential cost in a property demerger, so they deserve early attention.
How can I keep up to date with changes affecting demergers?
You can sign up to our newsletter using the form in the website footer and unsubscribe at any time. New articles are also added to this page as they're published. If a change affects a demerger you're planning, we'll tell you directly if you're a client. We don't send frequent emails.
What should I do if an article raises a question about my company?
Get in touch through the Book a call form, by email or by phone. A senior adviser can tell you whether the point applies to your situation and what your options are. The first conversation is confidential and without obligation, and we respond the same working day. Mention the article if it helps.
Do you write about demergers before selling a business?
Yes. Selling part of a group after a demerger raises its own issues, because some demerger reliefs have conditions about later changes of ownership. Our articles explain why the order of steps and the timing of a sale matter, and why a sale must be disclosed to HMRC in any clearance application.
Can I share an article with my accountant or business partner?
Yes, you can share a link to any article. They're a useful way to start a conversation about whether a demerger might suit the business. Bear in mind they're general information, so anyone reading them should take advice on their own position before acting. Accountants can also introduce clients to us.
Do you cover family succession and inheritance tax?
Yes, where it connects to a demerger. Families sometimes split a group so that different children run different parts, or to keep investment property separate from a trade. That can affect inheritance tax reliefs, so we explain the points to consider before the steps are taken. Business Relief changed from 6 April 2026, which makes this more relevant.
Are the articles written by tax advisers?
Yes. The articles are written and reviewed by our team, which is led by a Chartered Tax Adviser and includes Big 4-trained Chartered Accountants. We cite legislation where it helps, so you or your adviser can check the source. They're not written by marketing writers or generated without review, and every article is checked against the current law before it's published.
Do you write about demergers in Scotland or Wales?
Most demerger rules apply across the UK, because corporation tax, capital gains tax and stamp duty on shares are UK-wide. Property is different: land and buildings transaction tax applies in Scotland and land transaction tax in Wales, instead of SDLT. Where that matters, our articles point it out. Those taxes have their own reliefs.
Talk to us before anything moves.
In a demerger, the order of the steps is everything. A confidential first call, with a reply the same working day.
Or write to taxadvisory@aswatax.co.uk
