Sole trader or limited company in the UK: liability and responsibilities

A comparison of business structures in the UK, explaining liability for debts and the responsibilities of a company director.

Status checked: November 2, 2026. We are not a law firm. This text is for informational and educational purposes only and does not constitute individual legal advice. Before making a decision, check the regulations applicable to the location and type of business and consult a lawyer or other appropriate specialist.

Two different forms of running a business

A sole trader runs the business in their own name. No separate company is formed, and the owner is liable for the business's obligations. They can use a trading name and employ people, but should check the relevant registration, tax, and industry obligations.

A private limited company is a separate entity registered with Companies House. The owner and the company are not the same entity, and management is the responsibility of the directors. A shareholder and a director can be the same person, but these roles entail different rights and responsibilities.

What limited liability means

Debts incurred by the company are generally its debts. However, the term “limited” should not be viewed as full protection of personal assets. A separate liability may arise, for example, by signing a personal guarantee for the repayment of a debt. It is essential to check the document's content, limit, duration, and conditions for its expiration.

GOV.UK also explains that in cases of insolvency, improper actions by the director may lead to personal liability under certain circumstances. Simply being in a difficult financial situation does not automatically imply the director's fault. When arrears arise, a prompt assessment of the situation and obligations to creditors is necessary.

Documents and director's responsibilities

The director is responsible for maintaining documentation, providing required information, reports, and accounts of the company. They may use the services of an accountant, but delegating work to another person does not absolve them of their own responsibilities. Set a calendar of deadlines and check confirmations of document submissions.

Compare the data in Companies House with internal documents and check who is authorized to sign contracts. Separate company funds from personal funds, document expenses, and the basis for withdrawals. The rules for remuneration, dividends, and taxes require individual calculations.

How to choose a form

List the anticipated risks, revenues, costs, financing needs, and whether you plan to have partners. Compare not only the tax rate but also the costs of administration, public access to registration data, required documents, and how to use company funds. Do not assume that one form always wins for everyone.

Example: a company needs leasing, and the financier requires a personal guarantee from the director. Simply registering a limited company does not eliminate the risk arising from the signed guarantee. Before signing, check its scope and ask an independent specialist to explain the implications.

How to calculate costs and compare risks

Prepare two separate statements: anticipated revenues and costs of the business and the money the owner wants to withdraw for personal needs. For a limited company, check with an accountant the possible methods of withdrawal and their implications. The tax rate on one part of the settlement does not show the total burden.

To the comparison, add the cost of maintaining documentation, accounting, required filings, and any insurance. Analyze contracts with clients, loans, and guarantees. Two companies with similar turnovers may have very different risks if one rents premises and employs staff, while the other provides services independently.

In case of changing the form, do not assume that existing contracts, licenses, accounts, and obligations will automatically transfer to the new entity. Establish with contractors and advisors what approvals, new contracts, or filings are needed before the company starts operations.

Frequently asked questions

Does a limited company protect against every personal obligation?

No. A personal guarantee or other circumstances provided by law may lead to personal liability.

Does an accountant take over the director's responsibility?

No, not automatically. The director should still ensure that the company's obligations are being fulfilled.

Related guides

• Protecting personal assets in Poland

Sources