Written by Fraz Butt, Senior Director · SRA-regulated · Last reviewed 8 September 2026
Choosing a business structure in the UK usually comes down to a decision between operating as a sole trader, forming a partnership, or incorporating a limited company, and the right choice depends on your appetite for personal liability, your plans for growth and investment, and how you want to be taxed. Most founders who plan to bring in co-founders, investors or employees choose a limited company, but it is not always the right answer for every business. This guide sets out the key differences.
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Operating as a Sole Trader
As a sole trader, you and the business are legally the same entity. This is the simplest structure to set up and involves the least administration, but it also means you are personally liable for any debts or claims against the business, without the protection of limited liability.
This structure suits low risk, single founder businesses, particularly in the early testing phase, but it becomes harder to justify once the business takes on any meaningful risk, or once you want to bring in a co-founder or investor.
Forming a Partnership
A traditional partnership involves two or more people running a business together, sharing profits and, importantly, sharing unlimited personal liability for the business’s debts, including debts caused by the other partner. A limited liability partnership, or LLP, offers more protection, since liability is generally limited to what each partner has invested, but it still requires a well drafted partnership or members agreement to avoid disputes.
Partnerships are common in professional services, but for most trading or product businesses, a limited company structure now tends to offer a better balance of protection and flexibility.
Incorporating a Limited Company
A limited company is a separate legal entity from its owners, meaning shareholders are generally only liable up to the value of their shares. This structure makes it far easier to bring in co-founders, employees through share schemes, and outside investors, and it is the structure most investors expect to see.
The trade off is more administrative and reporting obligations, including annual accounts and confirmation statements at Companies House, and a formal governance structure through directors and shareholders.
Related reading: our startup legal checklist.
Tax Considerations Between Structures
Sole traders and partners are taxed through income tax and national insurance on business profits. Limited companies pay corporation tax on profits, and directors and shareholders are then taxed separately on any salary or dividends they draw from the company. Depending on profit levels, this can be more tax efficient, but it depends heavily on individual circumstances, and we always recommend taking accountancy advice alongside legal advice on this point.
Converting Structures as You Grow
It is entirely possible to start as a sole trader and later incorporate as a limited company once the business grows, and many founders do exactly this. The process involves transferring the business and its assets into the new company, and it is worth taking advice on how contracts, employees and any intellectual property transfer across, so nothing is left behind or exposed.
Structure and Your Shareholder Arrangements
If you incorporate with a co-founder, the choice of structure is only the first step. You will also need to agree how shares are split, how decisions are made, and what happens if one founder wants to leave. These questions are addressed in a shareholders agreement, which we cover in detail separately.
Related reading: shareholders agreements explained.
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Frequently Asked Questions / Questions & Answers
What is the main advantage of a limited company over a sole trader?
The main advantage is limited liability, meaning your personal assets are generally protected if the business runs into debt or is sued, provided you have acted properly as a director. A limited company also makes it easier to raise investment.
Can I change from a sole trader to a limited company later?
Yes, this is a common and straightforward path. You will need to transfer the business and its assets into the new company and update contracts, registrations and any agreements accordingly.
Is a partnership a good idea for a new business?
A traditional partnership carries unlimited personal liability for all partners, including for the actions of the other partner, so most new businesses with more than one founder choose a limited company or a limited liability partnership instead.
Should I get advice before choosing a structure?
It is worth doing so, particularly if you plan to bring in investors or co-founders, since the right structure at the start can be difficult or costly to unwind later.
Which structure do investors prefer?
Most UK investors, including those investing through SEIS or EIS, expect to invest in a limited company, since it provides a clear framework for share ownership and governance.
Speak to Saracens Solicitors
For advice on which structure is right for your business, speak to our Corporate Law team.
Visit our Corporate Law service page or call us on +44 (0)20 3588 3500 to arrange a consultation.
Saracens Solicitors, Thanet House, 231 to 232 Strand, London, WC2R 1DA.
