When to Incorporate: Moving From Sole Trader to Limited Company (2026/27)

Sooner or later most growing sole traders ask the same question: should I become a limited company? The usual answer points to a profit figure, often somewhere between 30,000 and 50,000 pounds, where the maths starts to favour incorporation. That is a useful starting point, but it is not the whole story. The right moment to incorporate depends on how much money you actually need to draw, the admin you are willing to take on, and several factors that have nothing to do with tax at all. Here is how to think it through for 2026/27.

Why incorporation can save tax

As a sole trader you pay income tax and Class 4 National Insurance on your whole profit, whether or not you take it out. For 2026/27 that means 20% basic-rate tax plus 6% Class 4 NI on profits between 12,570 and 50,270 pounds, and 40% plus 2% above that.

A limited company is taxed differently. The company pays Corporation Tax on its profit: 19% on profits up to 50,000 pounds, rising to 25% on profits above 250,000 pounds, with a marginal rate in between. You then extract money as a small salary plus dividends. Dividends have their own lower rates, 8.75% becomes 10.75% within the basic band and 33.75% becomes 35.75% in the higher band for 2026/27, after a 500 pound dividend allowance, and dividends carry no National Insurance.

The combination of a low salary, the dividend allowance and the absence of NI on dividends is what creates the saving. It is most powerful when you do not need to draw all of the profit, because money left in the company is only taxed at the Corporation Tax rate until you take it.

The headline tipping point

As a rough guide:

These bands are deliberately approximate. The real answer turns on a question the headline figure ignores: how much of the profit do you actually need to live on?

The factor everyone forgets: how much you draw

A sole trader is taxed on all profit. A company director is taxed personally only on what they extract. If you make 60,000 pounds of profit but only need to draw 40,000 pounds to live on, a company lets the remaining 20,000 pounds sit there, taxed only at Corporation Tax, until you need it. You might draw it in a quieter year, or use it for pension contributions, or build a buffer.

That deferral is one of the strongest reasons to incorporate, and it does not appear in a simple side-by-side tax comparison that assumes you take everything out. If, on the other hand, you need every pound of profit each year, the advantage shrinks considerably.

The costs that eat into the saving

Incorporation is not free. Expect:

• Higher accountancy fees, often 1,000 to 2,000 pounds a year for company accounts, a Corporation Tax return and payroll, compared with a simpler sole trader return.
• More filing: annual accounts and a confirmation statement at Companies House, plus the Corporation Tax return.
• Payroll admin if you run a salary through PAYE.
• Public accounts: your company's figures are visible at Companies House, unlike a sole trader's private return.

If your tax saving is 1,500 pounds a year but your extra costs are 1,200 pounds, incorporating buys you a lot of admin for a small net gain. This is exactly why low-profit businesses are usually told to wait.

The tax cost of incorporating itself

Moving your business into a company is a disposal for Capital Gains Tax purposes. If your business has built up goodwill or valuable assets, transferring them can create a CGT charge, though reliefs such as Incorporation Relief can defer it. Most very small businesses with little goodwill incorporate without a meaningful charge, but if your business is genuinely valuable, take advice on how to structure the transfer before you move anything.

You will also file a final sole trader Self Assessment for the period up to cessation, and you will need to set up or transfer bank accounts, insurance, contracts and VAT registration to the new company.

Non-tax reasons to incorporate

Tax is not the only driver. Incorporation can make sense for reasons that have nothing to do with the crossover point:

• Limited liability. A company is a separate legal entity, so in most cases your personal assets are protected if the business runs into trouble. For higher-risk trades this protection can matter more than any tax saving.
• Credibility. Some clients, particularly larger organisations, prefer or require suppliers to be limited companies.
• Raising investment or bringing in partners. Shares make it far easier to bring in co-owners or outside investment.
• Protecting a name. A company name is registered and protected at Companies House.

Equally, there are non-tax reasons to stay a sole trader: simplicity, privacy, lower cost and the freedom to take money out whenever you like.

A simple way to decide

Work through these questions in order:

1. Is my profit comfortably above the crossover zone, around 30,000 to 50,000 pounds or more? If not, the saving is probably too small to bother.
2. Can I leave some profit in the business rather than drawing it all? If yes, the company advantage grows. If no, it shrinks.
3. Will the tax saving clearly exceed the extra accountancy and admin costs? Get a quote for company accounts before deciding.
4. Do I want limited liability, credibility or the ability to bring in investment? If yes, that may tip the balance even when the tax case is marginal.

If you answer "yes" to most of these, incorporation likely makes sense. If your profit is modest, you draw everything, and the fees would swallow the saving, staying a sole trader is the sensible call for now. There is no penalty for waiting; you can incorporate later when the numbers and your circumstances are clearer.

The bottom line

The 30,000 to 50,000 pound tipping point is a helpful signpost, not a rule. The businesses that benefit most from incorporating are those with healthy profit, the ability to retain some of it, and a need for limited liability or credibility. For everyone else, the extra cost and admin can outweigh the tax saving. Model your own figures, including realistic accountancy fees, before you make the move.

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