Sole Trader to Limited Company: When Is the Right Time to Make the Switch?
Most people start out as sole traders — it is quick, simple, and cheap to set up. But as your income grows, so does your tax bill. At some point, operating as a limited company can save you a meaningful amount of money every year. The question is: when exactly is that point — and is it the right move for you? All figures and rates in this guide are correct as of 15 July 2026.
- Most accountants suggest considering incorporation once your net profit consistently reaches £50,000 per year.
- A limited company pays Corporation Tax at 19% (small profits rate) — often lower than sole trader income tax and NI combined.
- Directors can draw a tax-efficient mix of salary and dividends, reducing their personal tax liability.
- There are real costs and responsibilities with a limited company — it is not always worth it below certain profit levels.
- The decision depends on profit, risk, future plans, and your personal circumstances.
How Sole Traders Are Taxed
As a sole trader, all your profits are taxed as personal income. You pay Income Tax on everything above your Personal Allowance (£12,570 for 2025/26), plus Class 4 National Insurance on profits above the same threshold.
- Income Tax: 20% on profits from £12,571 to £50,270; 40% above £50,270
- Class 4 NI: 6% on profits from £12,570 to £50,270; 2% above
- Combined effective rate between basic and higher rate bands: 26%
- Once profits pass £50,270, the top combined rate rises to 42%
If your profits are £50,000, you could be paying around £9,700 in tax and NI. That figure rises sharply once you break into the higher rate band.
How Limited Company Directors Are Taxed
A limited company is a separate legal entity. It pays Corporation Tax on its profits (19% for profits up to £50,000 under the small profits rate). As a director, you take money out of the company as a combination of salary and dividends — and that is where the tax efficiency comes from.
- Pay yourself a salary up to the Personal Allowance (£12,570) — no income tax on this
- Extract remaining profits as dividends — taxed at lower dividend rates (10.75% basic rate; 35.75% higher rate as of 2026/27)
- Dividend Allowance of £500 per year is tax-free
- The company pays 19% Corporation Tax on profits before dividends are declared
On £50,000 of company profit, a director using this strategy could pay significantly less in total tax than a sole trader earning the same amount — the saving is commonly in the region of £3,000–£5,000 per year at this level.
The Profit Tipping Point: Where Does Ltd Become Worth It?
This is the question everyone asks — and the honest answer is that it depends on your circumstances. However, as a practical guide:
- Below £35,000 net profit: Stay sole trader — the extra accountancy and admin costs of running a Ltd company usually outweigh any tax saving.
- £35,000–£50,000 net profit: The grey zone — worth discussing with an accountant. Savings exist but may be marginal after Ltd running costs.
- £50,000–£70,000 net profit: Incorporation increasingly worthwhile — tax savings typically clear the extra costs comfortably.
- Above £70,000 net profit: A limited company almost certainly saves you money. The higher rate income tax exposure as a sole trader makes the case compelling.
Remember: these are profit figures after business expenses but before tax. And these are general guides — your actual saving depends on your salary, dividend strategy, pension contributions, and other income sources. Our business start-up and formation service can work through the exact numbers for your situation.
The Real Costs of Running a Limited Company
A limited company is not free to run. Before you get excited about the tax saving, factor in the additional costs:
- Accountancy fees: Typically £1,000–£2,000 more per year than sole trader accounts (for statutory accounts, Corporation Tax return, and director Self Assessment)
- Companies House annual confirmation statement: £34 per year (online)
- Payroll admin: Running a directors' payroll each month
- More complex bookkeeping: You need to keep company and personal finances strictly separate
This is why the rule of thumb is around £50,000 profit — the tax saving needs to comfortably outpace the extra costs. If you are working with us on your sole trader accounts already, we can tell you exactly where you stand.
Beyond Tax: Other Reasons to Go Limited
Tax efficiency is the main driver, but there are other good reasons to incorporate — and some reasons to hold off.
- Limited liability: Your personal assets are protected if the business runs into financial trouble. As a sole trader, you are personally liable for all business debts.
- Professional credibility: Some clients — especially larger businesses and public sector — prefer or require dealing with a limited company.
- Pension contributions: A company can make employer pension contributions, which are a deductible expense before Corporation Tax.
- Future investment or sale: A limited company structure is far easier to bring in investors or sell as a going concern.
- Your profit is still growing and has not yet reached £50,000 consistently
- Your business is a lifestyle business with no plans to scale
- You need to access all your profits immediately — leaving money in the company (as a basic rate dividend taxpayer) loses the efficiency benefit
- You are already approaching retirement and the timing may not give you long enough to benefit
Making Tax Digital — Does It Change Anything?
From April 2026, Making Tax Digital for Income Tax (MTD for ITSA) will require sole traders with income above £50,000 to submit quarterly digital tax updates. This extra admin burden — combined with the higher tax rates at that level — may tip the balance further in favour of incorporation for higher earners. You can find out more on our Self-Employed MTD page.
How to Make the Move
If you decide incorporation is right for you, the process is straightforward:
- Agree a company name and check availability at Companies House
- Incorporate the company (can be done same day online via Companies House for £50)
- Open a separate business bank account in the company name
- Register for Corporation Tax with HMRC (within 3 months of starting to trade)
- Set up a directors’ payroll and inform HMRC you are an employer
- Cease trading as a sole trader and deregister for Self Assessment if appropriate
Our limited company accounts service covers everything from formation through to annual statutory accounts, Corporation Tax returns, and director Self Assessment — so you are fully compliant from day one. We also handle your personal tax return as a director, including calculating the most tax-efficient salary and dividend split for your circumstances.
The Bottom Line
There is no single magic number — but if your net profit is consistently above £50,000 and growing, it is almost certainly worth having the conversation. The tax savings are real, the process is straightforward, and with the right accountant handling your affairs, the admin burden is minimal.
Not sure whether a limited company is right for you? Book a free call with the 360Accounts team and we will run through the numbers for your exact situation — no obligation, no jargon.
Book a Free ConsultationOr explore our transparent pricing and see what’s included.
Frequently Asked Questions
At what profit level should I consider moving from sole trader to limited company?
Most accountants suggest considering incorporation once your net profit (after expenses, before tax) is consistently above £50,000 per year. Below this level, the extra accountancy and admin costs of running a limited company often outweigh the tax savings. Above £70,000, the case becomes very compelling — you are likely paying 40% income tax and 2% NI as a sole trader versus 19% Corporation Tax and lower dividend tax rates as a limited company director.
How much tax could I actually save by going limited?
It varies significantly depending on your profit level and how you extract money, but as a guide: at £50,000 profit the annual saving is commonly £3,000–£5,000. At £80,000 profit the saving can be £6,000–£10,000+ per year. These are after factoring in Corporation Tax and dividend tax — your accountant can model the precise figure for your situation.
What are the downsides of running a limited company?
The main downsides are increased administration and cost. A limited company must file annual statutory accounts at Companies House, submit a Corporation Tax return, run a payroll, and keep company finances strictly separate from personal finances. Annual accountancy fees are typically £1,000–£2,000 higher than for a sole trader. There is also less flexibility — money in the company belongs to the company, not you personally, until it is formally extracted as salary or dividends.
Can I be both the sole director and sole shareholder of my own limited company?
Yes — this is extremely common in the UK. A single person can be the sole director and sole shareholder of a limited company. You are effectively your own boss and own 100% of the company. You control how and when profits are distributed as dividends. Many one-person consulting or freelance businesses operate this way.
Do I have to pay myself a salary as a limited company director?
You are not legally required to pay yourself a salary — directors are not automatically classed as employees. However, for tax efficiency most director-shareholders pay themselves a salary up to the Personal Allowance (£12,570) or the National Insurance primary threshold, then take additional money as dividends. The exact optimal split depends on whether you have other income and whether Employment Allowance applies to your company.
What happens to my sole trader business when I incorporate?
You cease trading as a sole trader and the limited company takes over trading. In practice this means: the company opens a business bank account, raises invoices, and takes on any business assets or contracts. You will need to notify HMRC that you have ceased self-employment, deregister from Self Assessment as a sole trader (though you will still need to file a return for the final sole trader year), and register the company for Corporation Tax. If you are VAT-registered, you can transfer the VAT number to the new company. An accountant can manage this transition for you.