When Should You Switch from Sole Trader to Limited Company?

Signs It Might Be Time

Your Profits Consistently Exceed £40,000-£50,000

This is the rough crossover point where the combined Corporation Tax and dividend tax becomes more efficient than income tax and NI. The exact figure depends on your personal circumstances, but if you are regularly earning above this level, it is worth running the numbers.

You Want to Save for Retirement Tax-Efficiently

Employer pension contributions from a limited company are Corporation Tax deductible and free from National Insurance. This can save thousands compared to personal contributions from sole trader income.

You Need Limited Liability

If your business carries risk — contracts with large clients, potential for disputes, working in high-liability areas — a limited company protects your personal assets.

Clients Require It

Some industries and clients prefer or require working with limited companies, particularly in IT contracting and consultancy.

You Want to Retain Profits

A limited company can retain profits (taxed at 25% Corporation Tax) rather than distributing everything. This is useful if you want to reinvest in equipment, marketing, or future growth.

Signs to Stay as a Sole Trader

• Profits under £40,000
• You value simplicity over tax savings
• You do not want the cost of accountancy for a limited company (£1,000-£3,000 per year)
• Your income is variable and incorporation may not consistently save tax
• You mainly work for one client (IR35 risk)

The Process

1. Register a company with Companies House (£12 online)
2. Register for Corporation Tax with HMRC
3. Open a company bank account
4. Set up PAYE for your salary
5. Continue trading through the company
6. Close your sole trader Self Assessment (or keep it if you have other personal income)

Get Advice

The decision to incorporate has long-term implications. Speak to an accountant who can run the numbers for your specific situation. The cost of a one-hour consultation is nothing compared to making the wrong structural decision.

In the meantime, keep your sole trader finances organised with Accounted — clean records make the transition smoother.

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Grow your business, then grow your structure. Sign up for Accounted and let Penny keep your finances ready for whatever comes next.