Most comparisons stop at ‘Corporation Tax is lower than Income Tax,’ which is true but incomplete — it ignores what happens when you actually try to get money out of the company, and the extra admin that comes with the lower rate.
The Headline Numbers
Corporation Tax runs 19 to 25 percent on company profits, against Income Tax of 20 to 45 percent for a sole trader on the same profit level. That gap looks decisive on its own, but it only tells you what the company pays — not what you personally take home once you extract the money as salary, dividends, or a mix of both, which carries its own separate tax treatment layered on top.
What You Actually Get for the Extra Admin
A limited company brings real liability protection — personal assets protected from business debts, with exceptions — alongside higher credibility through the ‘Ltd’ designation and the ability to issue shares to investors if you want to raise capital. The tradeoff is administrative: a Confirmation Statement, annual accounts, and a Corporation Tax return every year, versus a sole trader's single Self Assessment return. Company details are also public on the Companies House register, where a sole trader's are not.
When Each Structure Actually Fits
Form a limited company if you want liability protection, plan to hire employees, want to raise investment, or your business carries real financial risk and you are planning significant growth. Stay a sole trader if you are testing a business idea, want minimal administration and complete privacy, or plan to extract all profits immediately rather than reinvesting them — the tax efficiency argument for incorporating weakens considerably at lower profit levels, since the compliance cost is roughly fixed regardless of how much the business actually earns.
Where to Go From Here
The Complete UK Limited Company Formation Guide covers the full decision matrix, plus the complete formation process, required documents, and the annual compliance calendar once you have decided to incorporate.
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This article is for educational and informational purposes only and does not constitute tax or legal advice. Tax rates and thresholds change — confirm current figures on GOV.UK and consult a qualified accountant for your specific situation.