Moving from sole trader to limited company is more than filling in a form. You are creating a new legal entity, closing one set of tax records and opening another. Done in the right order it is straightforward. Done in the wrong order it can mean missed registrations, awkward asset transfers and tax surprises. This checklist walks through the switch in a sensible sequence.
Key takeaways
- Decide first whether a company really suits your profit level and lifestyle.
- The company is a separate legal entity, with its own bank account, tax registrations and accounts.
- You must close your sole trader business properly with HMRC, including a final Self Assessment return.
- Plan what happens to assets, contracts, clients and your own pay before you move.
What changes when you incorporate
As a sole trader you and the business are one and the same for tax purposes. A limited company is separate: it owns the contracts, pays corporation tax on its profits and has directors and shareholders. You can no longer treat business money as your own. You usually take money out as salary, dividends or loan repayments, each with different tax treatment. Our comparison of limited company vs sole trader explains the trade-offs, and our guide to director salary vs dividends covers pay.
The switch checklist
| Stage | Task | Notes |
|---|---|---|
| 1. Decide | Model your tax as sole trader and as a company | Do not switch on a hunch |
| 2. Form the company | Choose a name, register with Companies House, appoint directors | Check the name is available and suitable |
| 3. Register for tax | Corporation tax, and PAYE or VAT if needed | Registration deadlines apply |
| 4. Open banking | Business bank account in the company name | Keep personal and company money apart |
| 5. Move the business | Contracts, clients, insurance, licences, assets | Some contracts need the other party's consent |
| 6. Close the sole trade | Tell HMRC, file the final return | Know your cessation date |
| 7. Set up records | Bookkeeping, payroll, year-end diary | Companies House and HMRC deadlines both apply |
Registering with HMRC and Companies House
Form the company first. Companies House will issue a company number, and the company then needs its own HMRC registrations. Corporation tax registration is needed once the company begins trading, and if you will pay yourself a salary or employ anyone you must set up PAYE. VAT registration depends on the company's turnover, so read our guide to the VAT registration threshold. You can see the official routes on GOV.UK's guide to setting up a limited company.
Closing the sole trader business
You need to tell HMRC that you have stopped trading as a sole trader and prepare a final set of accounts and a Self Assessment return covering the last period. Overlap rules and payments on account can make the final year more complicated than usual, which is why timing the switch matters. Read GOV.UK's guidance on stopping self-employment and our explanation of payments on account before you pick a date.
Assets, contracts and clients
A vehicle, tools or equipment you own personally can be sold to the company, put in at a value, or kept personal and charged for use. Each option has different tax effects, including possible capital gains or capital allowance implications, so do not move anything without advice. Contracts with platforms, clients or suppliers may need to be re-papered in the company name, and insurance, licences and permits must match the new trading entity. Tell your customers if invoices will change, and update your invoice template with the company name and number.
Worked example (illustrative)
"Nadia", an illustrative example, is a self-employed courier whose profit has grown. She asks an accountant to compare her tax as a sole trader and as a company, including the extra admin cost. The numbers favour a company, so she forms one, opens a company bank account and registers for corporation tax and PAYE. She moves her client contracts across, keeps her van personal and charges a mileage-based rate for its use, and agrees a cessation date for her sole trade with her accountant. She files her final sole trader return on time and sets up monthly bookkeeping for the company. The example is invented to illustrate the sequence, not to suggest that a company is right for everyone.
Common mistakes
- Switching without running the numbers. A company is not automatically cheaper once admin costs are included.
- Mixing personal and company money. It creates a director's loan account problem. See our guide to the director's loan account.
- Forgetting the final sole trader return. The old business still needs closing properly.
- Moving assets casually. Transfers can trigger tax.
- Missing registrations. Corporation tax, PAYE and VAT each have their own triggers.
We help sole traders move across smoothly. See our limited company packages, or get in touch to plan your switch.
Frequently Asked Questions
Do I have to close my sole trader business to form a company?
Effectively yes, because the company becomes a separate legal entity that carries on the trade. You need to tell HMRC that you have stopped trading as a sole trader and complete a final Self Assessment return for the period.
What happens to my business assets when I switch?
Assets such as a vehicle or equipment can be sold or transferred to the company, which may have tax consequences. The right approach depends on the asset and its value, so get advice before you move anything.
Do I need a new bank account?
Yes. A limited company is a separate legal entity, so it needs its own business bank account, and company money must be kept apart from personal money.
Will I need to register for VAT, PAYE or both?
The company is a new taxpayer, so it must consider its own VAT, PAYE and corporation tax registrations. Whether you must register depends on turnover and on whether you pay yourself a salary or employ staff.
Is switching always worth it?
No. A company brings extra admin and costs, and the tax saving depends on your profit and how you extract money. Run the numbers for your own case before deciding.
Related reading
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Schedule a consultation →Written by the Berber Accounts & Tax team, 124 City Road, London EC1V 2NX, United Kingdom.
Last reviewed: 3 October 2026.
This article is general information, not personal tax advice. Speak to a qualified accountant about your own circumstances before acting on it.