--- title: "UK company structures explained: sole trader, limited company, alphabet shares and groups (2026/27)" date: 2026-05-13 author: "Nicole Valentine" featured_image: "https://navaaccountancy.co.uk/wp-content/uploads/2026/05/uk-company-structures-explained-hero.png" categories: - name: "Accountancy" url: "/accountancy.md" --- # UK company structures explained: sole trader, limited company, alphabet shares and groups (2026/27) Quick answer The right UK company structure depends on your profits, risk profile, and family situation. Sole traders pay income tax on all profits and carry personal liability. A limited company separates you from the business, opens up dividend planning, and becomes worthwhile once profits sit comfortably above roughly £30,000 to £50,000. Alphabet shares let directors vary dividends between shareholders, useful for involving a spouse or adult children. A holding company sits above one or more trading companies and is worth considering once you own property inside the business, run multiple trades, or are thinking about a future sale. Get the structure wrong and you pay too much tax, or worse, expose personal assets you didn’t need to. Most UK business owners I speak to didn’t really choose their structure. They picked sole trader because it was the path of least resistance, or they set up a limited company because a friend said they should. Three years later, profits have grown, a partner has joined the business, or property has been bought through the company, and suddenly the original structure doesn’t fit. The good news is structure isn’t a one-time decision. You can move from sole trader to limited company. You can issue new share classes. You can drop a holding company in above your trading company. Each step has tax consequences, legal paperwork, and timing considerations, and getting them in the right order matters. This guide walks through the four main building blocks of UK company structure: sole trader, limited company, alphabet shares, and group structures. By the end you’ll know which one fits where you are now, and which one to plan for next. ![British pound sterling notes fanned out on a desk with a calculator showing 1546.38 and UK tax accountancy report documents.](https://navaaccountancy.co.uk/wp-content/uploads/2026/03/gbp_featured_v2-1024x571.jpg)## What are the main UK business structures? There are four structures most small and medium UK businesses sit inside or around: - Sole trader - Partnership (including LLPs) - Limited company - Group structure with a holding company On top of those, limited companies can use different classes of shares (often called alphabet shares) to vary how dividends are paid. The structure isn’t just legal. It changes your tax bill, your personal exposure, who can take income from the business, and what happens if you eventually sell. ## When does a sole trader setup stop making sense? Sole trader is the simplest structure in the UK. You register with HMRC for Self Assessment, you keep your business records, and you pay income tax and Class 4 National Insurance on your profits. No Companies House filings, no separate corporation tax return, no formal accounts. The trade-off is that you and the business are the same legal person. If a customer sues, or a contract goes wrong, your house and personal savings are on the line. And once profits start climbing, the tax becomes inefficient. As a rough rule, sole trader stops being the most tax-efficient option once your taxable profits push past around £30,000 to £50,000, depending on what you take out personally. Above that level, a limited company usually wins on tax, though only by a few thousand pounds at first. The breakeven moves around each year with corporation tax rates, dividend tax rates, and personal allowances, so it’s worth running the numbers annually rather than relying on the old “incorporate at £50k” rule of thumb. If you want to compare the two side by side, our earlier post on [sole trader vs limited company for the 2025/26 tax year](https://navaaccountancy.co.uk/sole-trader-vs-limited-company-which-is-right-for-your-uk-business-in-2025-26/) goes through the maths in detail. ## Why do most growing UK businesses become limited companies? A limited company is a separate legal entity. It owns its own contracts, its own bank account, its own assets, and any debts it racks up are its own, not yours personally. You become a director and shareholder, and the company pays you through some mix of salary and dividends. Three things drive the move: - Limited liability. Your personal assets are protected if the business fails or gets sued. - Tax planning. You can split how you take money out between salary, dividends, and pension contributions, which gives you more control over your personal tax position. - Credibility. Some clients, lenders, and suppliers prefer dealing with limited companies, particularly in B2B markets. The downside is the admin. You’ll file annual accounts and a corporation tax return, deal with PAYE if you take a salary, keep statutory registers, and file a confirmation statement each year at [Companies House](https://www.gov.uk/government/organisations/companies-house). If you want a deeper look at how to actually pay yourself from a limited company, the breakdown of [salary vs dividends for 2026/27](https://navaaccountancy.co.uk/how-to-pay-yourself-as-a-limited-company-director-salary-vs-dividends/) covers it. ## What are alphabet shares and when should I use them? Alphabet shares are just different classes of ordinary shares in the same company, usually labelled A, B, C and so on. Each class is set out in the company’s articles of association and can have different rights around dividends, voting, and capital on a winding up. For owner-managed UK companies, the most common use is dividend flexibility. If your spouse holds B shares and you hold A shares, the directors can declare a dividend on one class without paying the other class at the same time, or pay different amounts to each class. That gives you the ability to use both partners’ personal allowances, basic rate bands, and dividend allowances rather than concentrating all the income on one person. A simple example. A married couple where one spouse runs the company and the other has lower personal income can save several thousand pounds a year by splitting dividends rather than paying them all to the working director. The savings come from using two dividend allowances (£500 each in 2026/27) and shifting income from the higher rate band into the basic rate band on the lower-earning spouse. ### Where alphabet shares can go wrong Alphabet shares aren’t a free pass. HMRC has a piece of law called the settlements legislation (sometimes called S624 ITTOIA 2005, or the S660 rules). It targets arrangements where one person tries to shift income to another in a way that isn’t a genuine commercial arrangement. Three things help keep alphabet shares onside: - Outright gift. Shares given to a spouse should be an outright gift carrying full ownership rights, not just a right to income. The Arctic Systems case (2007) confirmed this exemption works for spouses and civil partners. - Genuine voting and capital rights. If your spouse’s shares only carry rights to dividends, with no vote and no share of capital on winding up, HMRC will argue the arrangement is really just a right to income, which falls foul of the settlements rules. - Documented properly. Issue the shares correctly through a share allotment, update the company’s articles to define each class, file the SH01 with Companies House, and keep the paperwork tidy. Issuing alphabet shares to adult children, employees, or anyone outside a spouse is more complicated and brings employment-related securities rules and potentially benefit-in-kind issues into play. That’s a conversation to have with us first, not after the fact. ## What is a holding company and when do I need one? A holding company is a limited company that owns shares in one or more other companies (the subsidiaries or trading companies). The holding company usually doesn’t trade itself. It just owns the shares, receives dividends from the subsidiaries, and holds assets like property, investments, or intellectual property. You don’t need one when you’re starting out. Most businesses run perfectly well as a single trading limited company for years. Holding companies start to earn their keep in a handful of situations: - You’re running more than one trade through one company and want to separate the risks. - You’re buying property or building up cash reserves that you don’t want sitting inside the trading company where customers, creditors, or HMRC disputes could reach them. - You’re thinking about selling the business in the next five to ten years, and you want flexibility about what gets sold. - You want to extract profits from the trading company up to a holding company without paying tax on the way, then reinvest those profits elsewhere. ### The two big tax advantages UK group structures get two genuinely useful tax reliefs: The first is the inter-company dividend exemption. A trading subsidiary can pay a dividend up to its UK holding company and, in almost all cases, no corporation tax is due on the way up. The holding company can then sit on the cash, lend it to another subsidiary, or invest it. The second is the substantial shareholding exemption (SSE). If the holding company sells the trading subsidiary, and certain conditions are met (broadly, the holding company has owned at least 10% of the subsidiary for at least 12 months in the six years before sale, and the subsidiary was a trading company during that time), the gain on the sale can be exempt from corporation tax. The detail is in HMRC’s [Capital Gains Manual at CG53000 onwards](https://www.gov.uk/hmrc-internal-manuals/capital-gains-manual/cg53000c), but the point is this: with the right structure, the holding company can sell a trading subsidiary and pay no corporation tax on the gain. That’s powerful, but it only works if the structure is in place well before any sale conversation starts. Drop a holding company in the year before you sell and SSE won’t be available, because the 12-month ownership test won’t be met. ## What are the costs and admin of a group structure? Every additional company in a group is its own legal entity with its own filings: - Separate set of statutory accounts each year. - Separate corporation tax return. - Separate confirmation statement at Companies House. - Separate bank account, separate bookkeeping, separate VAT return (or a group VAT registration, which is a separate decision). For most clients, the extra running cost per company sits in the £700 to £1,500 range per year, on top of the original company’s fees. So a two-company group will roughly double your accountancy and compliance bill compared to a single company. That’s fine when there’s a clear reason for the structure. It’s wasted money when there isn’t. ## How do I move from one structure to another? The two most common moves are sole trader to limited company (incorporation) and single limited company to group structure (inserting a holding company). Incorporation involves transferring the trade and any business assets from you personally into a new limited company. There are reliefs available, particularly Section 162 of TCGA 1992 (incorporation relief), which can defer the capital gains tax that would otherwise arise on transferring assets like goodwill and property. The deal has to be structured correctly, ideally with us involved before any transfer happens. Inserting a holding company over an existing limited company is usually done through a share-for-share exchange. The existing shareholders give up their shares in the trading company in return for shares in a newly formed holding company, and the holding company then owns the trading company. Done properly, this can be tax neutral. Done badly, it can trigger a capital gains tax bill on the shareholders’ notional disposal of the trading company shares. HMRC clearance can be applied for in advance under sections 138 and 139 TCGA 1992, which is normally what we’d recommend. ## Which structure is right for my UK business? Honestly, this is the question we’re asked more than any other — and the truthful answer is that it completely depends on your business circumstances and personal preferences. There is no one-size-fits-all. Two businesses with identical turnover can sit best in entirely different structures once you factor in family situation, risk profile, growth plans and how you want to take income. That said, the framework below is a useful starting point and reflects how we guide most clients in an initial conversation: - Starting out, profits under about £30,000 a year, low risk, you’re the only person taking income: sole trader is fine. - Profits above about £50,000, or you want liability protection, or you want flexibility in how you take income: limited company. - Limited company with a spouse or civil partner who has unused personal allowance and basic rate band, and who’ll have genuine ownership rights: consider alphabet shares. - Limited company that owns property, runs multiple trades, has built up large cash reserves, or where a sale is on the horizon: time to talk about a holding company. The biggest mistake we see isn’t choosing the wrong structure. It’s leaving the original structure in place long after the business has outgrown it. If you’re a Rossendale or wider Lancashire business owner (or anywhere else in the UK, we work remotely with clients nationally) and you’re not sure whether your current setup still fits, that’s exactly what a discovery call is for. We’ll look at where you are, where you’re heading, and whether your structure is helping or holding you back. You can book one on our [contact page](https://navaaccountancy.co.uk/contact/). ## Frequently asked questions ### Can I have alphabet shares as a sole director with no other shareholders? You can create the share classes in your articles, but they only do anything once you actually issue them to a second shareholder. Most owner-managed alphabet share setups involve issuing B shares to a spouse, civil partner, or sometimes an adult child. ### How much does it cost to set up a holding company in the UK? The Companies House digital incorporation fee is £100 (effective from 1 February 2026) to set up the holding company itself. The real cost is in the legal and tax work to insert it above an existing trading company, which typically runs to a few thousand pounds depending on complexity, and the ongoing extra compliance cost of £700 to £1,500 a year for the additional set of accounts and returns. ### Do I need to tell HMRC if I change my business structure? Yes. Moving from sole trader to limited company means you’ll deregister for Self Assessment (or change what you report), the company will register for corporation tax within three months of starting to trade, and you may need to register for PAYE and VAT separately. Inserting a holding company will trigger Companies House filings and often a clearance application to HMRC under TCGA 1992 sections 138 and 139. ### Can alphabet shares trigger an HMRC investigation? Alphabet shares used properly between spouses are well-established and follow the Arctic Systems precedent. Where HMRC pushes back is when the share rights don’t carry genuine ownership, or where shares are issued to children, employees, or third parties without the proper employment-related securities reporting. Get the documentation right and the risk is low. ### What’s the difference between a holding company and a group company? A holding company is a specific type of company that owns shares in other companies. A “group” is the umbrella term for the holding company plus all the companies underneath it. So the holding company is one part of the group structure, and the trading companies are the other parts. ### Will I save tax by moving to a limited company? Usually yes, once profits sit above the £30,000 to £50,000 mark, but the savings depend on how much you take out personally, what corporation tax band you fall into, and your other income. We always run the numbers both ways before recommending incorporation, because in some situations the tax saving is small enough that the extra admin isn’t worth it.