A complete, honest breakdown of how each business structure is taxed — with a real-time interactive calculator, income threshold analysis, and a clear recommendation for your situation.
The tax treatment, administration, and risk profile are fundamentally different. Here's what you need to know at a glance.
Understanding exactly what taxes apply — and at what rates — is essential before comparing take-home pay.
For sole traders earning between £100,000 and £125,140, every £2 earned above £100,000 results in £1 of Personal Allowance being withdrawn. By £125,140, the Personal Allowance is gone entirely. This creates an effective marginal tax rate of approximately 60–62% (40% Income Tax + loss of PA taxed at 40% + 2% NIC) on income in this band.
A limited company director taking a salary of £9,100 and dividends totalling, say, £80,000 would have total personal income of £89,100 — safely below the £100,000 threshold — even if the company turned over £120,000. This is one of the most powerful tax planning advantages of incorporation.
Click each band to see the detailed breakdown, tax comparison figures, and our recommendation.
At this level, the tax difference between structures is minimal — typically under £1,000 per year. The extra cost of running a limited company (accountancy fees, Companies House filings, payroll) will almost certainly outweigh any potential tax saving. Keep it simple.
Both structures attract similar overall tax in this band, with sole trader often slightly ahead for full profit extraction. However, if you can regularly retain £5,000–£15,000 per year in the company, Ltd starts to make sense — that retained profit only bears 19% Corporation Tax rather than 20% Income Tax + 6% NIC. If limited liability protection is important to you (e.g. you carry professional risk), Ltd becomes worth considering here.
This is where the decision becomes genuinely nuanced. As a sole trader, income above £50,270 is taxed at 40% + 2% NIC = 42%. As a Ltd director, you only pay 33.75% dividend tax on higher-rate dividends — but you've already paid up to 25% Corporation Tax. For pure extraction, the difference is small. The real advantage of Ltd here is profit retention: money left in the company pays only 19–25% tax rather than 42% as a sole trader, making it far more efficient to reinvest in the business, build reserves, or defer income to future years.
This is the most critical income band in the UK tax system. As a sole trader, every pound earned between £100,000 and £125,140 is effectively taxed at around 60–62% — the highest marginal rate in the UK outside of additional rate. This is because your Personal Allowance (£12,570 of tax-free income) is withdrawn at £1 for every £2 of income over £100,000.
A limited company completely avoids this trap. With a salary of £9,100, a director extracting £80,000 in dividends from a company generating £120,000 profit has personal income of £89,100 — well below £100,000 — regardless of the company's turnover. The remaining profits stay in the company at 25% Corporation Tax.
At this level, both structures face their highest rates — but the flexibility of a limited company is invaluable. As a sole trader, all profit is taxed at 45% + 2% NIC = 47% on amounts above £125,140. A Ltd director can spread income across multiple years, use pension contributions (employer contributions paid by the company reduce both Corporation Tax and National Insurance), and control the mix of salary and dividends.
Additionally, Entrepreneurs' Relief (now Business Asset Disposal Relief) may allow a 10% Capital Gains Tax rate when you ultimately sell or wind up the business — a potentially enormous saving vs. regular dividend extraction.
Enter your annual gross profit (revenue minus business expenses) to compare both structures side by side using 2024/25 tax rates.
Select tax year below · Director salary £9,100 (2024/25) or £9,100 with employer NIC (2025/26+) · Full extraction · One company, one director
Important assumptions: Full extraction scenario (all post-tax profits paid as dividends). Income tax, NIC, CT and dividend rates are frozen and identical for 2024/25–2026/27 except employer NIC. Director salary £9,100 used across all years; employer NIC applies from 2025/26 (15% above £5,000 secondary threshold). CT 19%/25%, Dividend Tax 8.75%/33.75%/39.35%, Dividend Allowance £500. For illustration only — does not include pension contributions, other reliefs or profit retention strategies. Contact GW Pro Advisory for a personalised analysis.
The calculator above shows full extraction. But the real power of a limited company is keeping money in the business. If you earn £80,000 but only need £45,000 to live on, the remaining £35,000 (after Corporation Tax) stays in the company at 19–25% CT — rather than being taxed immediately at 40–42% as a sole trader. That's a deferred tax saving of up to £7,000 on those retained profits alone — every single year. Compound this over 5–10 years and the difference is substantial.
Tax efficiency is important — but it's not the only consideration when choosing your business structure.
| Factor | Sole Trader | Limited Company |
|---|---|---|
| Personal Liability | Unlimited — personal assets at risk | Limited to share capital |
| Setup Cost & Time | Free — register with HMRC online | £12 at Companies House + admin |
| Annual Administration | Self Assessment only (once/year) | Accounts · CS01 · CT600 · Payroll · SA |
| Accountancy Fees | £500–£1,500/year typically | £1,500–£4,000+/year typically |
| Privacy | Fully private — no public filing | Accounts & directors publicly visible |
| Professional Image | Acceptable for most clients | Preferred by many larger clients |
| Bank Lending & Finance | Can be harder — personal credit used | Company credit separate from personal |
| Bringing In Partners | Must convert to partnership or Ltd | Issue shares — straightforward |
| IR35 / Off-Payroll Rules | Generally not applicable | Can be caught — seek advice |
| Pension Contributions | Personal contributions only (relief at source) | Employer contributions — CT deductible & NIC-free |
| Business Sale / Exit | Sell assets — standard CGT rates apply | BADR: potentially 10% CGT on £1m lifetime gains |
| MTD for IT (from April 2026) | Applies from April 2026 if income >£50k | Not subject to MTD for IT |
Use these prompts to guide your thinking — then speak to an advisor for a tailored recommendation.
As a limited company director, your company can pay directly into your pension as an employer contribution. These contributions are deducted from the company's profits before Corporation Tax — saving up to 25p in every £1 contributed. They are also free from employer and employee National Insurance. A sole trader can contribute to a pension, but only from post-tax income, making it less efficient. For higher earners, combining profit retention with employer pension contributions can dramatically reduce the total tax bill.
A practical illustration of how the two structures compare for a higher-earning professional — including the retention strategy.
Every business is different. Our team at GW Pro Advisory will analyse your specific income, lifestyle needs, and goals to give you a personalised recommendation — and handle the incorporation if you decide to proceed.
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