Limited Company Tax for Directors / Lesson 9 of 9
Should you incorporate at all?
The tax saving is real. So is the cost, the admin, and the public filing.
The short answer
- ✓ The company advantage is largest when profit is retained rather than fully extracted
- ✓ Below roughly £30,000 of profit the saving may not cover the extra admin
- ✓ Company accounts, your name and registered address are publicly searchable
- ✓ Incorporating is far easier than unwinding it later
Where the saving comes from
A sole trader pays income tax and Class 4 NI on the whole profit. A company pays corporation tax, and you then pay personal tax only on what you extract, at lower dividend rates and with no National Insurance on dividends.
Profit around £30,000
Difference is small; admin cost may cancel it
Profit around £60,000
Company usually ahead, meaningfully
Profit around £100,000+
Company clearly ahead on tax alone
But only if you do not need to extract every penny.
Extract it all and much of the advantage disappears.The advantage depends on retaining profit
This is the point most comparisons skip. The company saving is largest when profit stays in the business, taxed once at corporation tax rates and extracted later. If you need every pound of profit to live on, you pay personal tax on all of it anyway and the gap narrows sharply.
A sole trader taking everything and a director extracting everything are much closer than the headline rates imply.
What incorporating costs
| Cost | Detail |
|---|---|
| Annual accounts | Statutory format, usually needs an accountant |
| Company tax return | CT600, separate from your personal return |
| Confirmation statement | Annually to Companies House |
| Payroll | Real Time Information filings for any salary |
| Your personal return | Still required, for dividends |
| Public disclosure | Accounts and directors visible to anyone |
| Director duties | Legal responsibilities that do not apply to sole traders |
The public filing surprises people. Your accounts, your registered address and your name as director are all searchable by anyone, including competitors and clients.
Reasons that are not about tax
- Limited liability, subject to personal guarantees
- Some clients only contract with limited companies
- Easier to bring in shareholders or sell the business
- Perceived credibility in some sectors
These are often the deciding factors rather than the tax, and they are legitimate reasons on their own.
The bit nobody explains
Incorporating is much easier than unincorporating. Moving an existing business into a company can trigger capital gains on goodwill and assets, and unwinding it later is harder and more expensive still.
Because of that asymmetry, incorporating at a profit level where the benefit is marginal is a poor trade. Wait until the advantage is clear rather than incorporating early on the assumption you will grow into it.
You have reached the end
You now know how the two layers of tax work, how corporation tax is charged and when it is due, how to take money out through salary and dividends properly, the director loan account traps, IR35, benefits and equipment, and how to think about whether the structure fits you at all. The exam covers all three modules.
General tax information, not financial or legal advice. Incorporation decisions are worth taking properly advised.
Try it on your own numbers
This is the same calculator as the full tool page, using 2026/27 rates.
Your business
Enter your annual profit. We tax it both ways - sole trader vs limited company extracting everything - and show the winner.
Scottish bands apply to your sole-trader income. Dividends are taxed at UK-wide rates, so the company side is the same across the UK.
Most single-director companies with no other employees can't claim this - leave off if unsure. It only affects employer NI on your salary.
Tax comparison only, for 2026/27, assuming all profit is extracted in the year. A company typically adds £1,500–£2,500 a year in accountancy and filing costs on top.
The verdict on profit
keeping more per year ( vs )
Both routes keep almost exactly the same after tax.
Sole trader
take-home · tax
Limited company
take-home · tax
Crossover point
Tax estimate only - it excludes accountancy costs, pensions and retained profit. Take advice before incorporating.
Take-home by profit level - where the lines cross
Both routes across the profit range, using your salary and region settings. Where the green line rises above the blue one, incorporating starts to pay off.
Sole trader
- Profit
- Income Tax
- −
- Class 4 National Insurance
- −
- Total tax
- Take-home
Limited company (full extraction)
- Salary drawn
- Employer NI on salary
- −
- Corporation Tax
- −
- Dividends taken
- Income Tax + NI on salary
- −
- Dividend tax
- −
- Total tax (company + personal)
- Take-home
Company route: salary is a deductible expense, the company pays employer NI at above , Corporation Tax uses the small-profits rate, main rate and marginal relief, and the remaining profit is paid out as dividends taxed after the allowance. Sole trader route: Income Tax on profits plus Class 4 NI at then .
Tax isn't the whole story
A company still wins when you…
- Don't need all the profit - retained profit is taxed only at Corporation Tax
- Pay into a pension - employer contributions are deductible with no NI
- Want limited liability for your personal assets
- Need the credibility some clients and lenders prefer
But budget for the extras
- Typically £1,500–£2,500 a year in accountancy and filing
- Accounts, Companies House filings and payroll admin
- Dividend paperwork and a director's Self Assessment
- Possible tax on transferring an existing business in
What this means for you
Do this next, in order
Estimates only - not financial or tax advice. Confirm figures on GOV.UK or with an adviser.
Compare saved scenarios
| Scenario | Sole trader | Company | Winner | |
|---|---|---|---|---|
Key takeaways
- ✓ The company advantage is largest when profit is retained rather than fully extracted
- ✓ Below roughly £30,000 of profit the saving may not cover the extra admin
- ✓ Company accounts, your name and registered address are publicly searchable
- ✓ Incorporating is far easier than unwinding it later
Check you have got it
3 quick questions. No score is kept, and you can change your mind.
1. When is the tax advantage of a company largest?
2. What becomes publicly visible when you incorporate?
3. Why is incorporating at a marginal profit level a poor trade?
Sources
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