UK Business Structures Explained: Which One Is Right for You?

One of the first decisions you’ll make when going into business for yourself is which legal structure to use. It affects your tax, your paperwork, your personal liability, and how easy your business is to run day to day.

The good news: for most people just starting out, the decision is simpler than it looks. This guide explains the four most common UK business structures, what each one means in practice, and who tends to choose each one — so you can make an informed decision rather than just picking what sounds right.

Disclaimer: I’m a Chartered Accountant but I’m not your accountant. This post is for guidance and information only. Business structure decisions can have real tax and legal implications — if you’re unsure, speak to a qualified professional before deciding.

The Four Main UK Business Structures

Most people reading this are choosing between sole trader and limited company. We’ll cover all four in detail below — but if that’s your main question, here’s a deeper look at sole trader vs limited company specifically.

1. Sole Trader

The simplest and most common way to run a business in the UK. As a sole trader, you and your business are legally the same entity — you own everything the business earns, and you’re personally responsible for everything it owes.

What it means in practice

You register with HMRC, keep records of your income and expenses, and file a Self Assessment tax return (or quarterly MTD updates if you’re above the income threshold) each year. There’s no Companies House registration, no public filing of accounts, and no requirement to have a separate business bank account — although having one makes your life significantly easier.

Pros

• Simplest structure to set up — register online with HMRC in 20 minutes
• No registration fee if you do it yourself
• Minimal reporting requirements compared to other structures
• All profits belong to you after tax
• Easy to switch to a limited company later if your circumstances change
• Your finances remain private — nothing publicly filed

Cons

• You’re personally liable for all business debts — no separation between you and the business
• Can be harder to access certain types of finance
• Tax can be higher at elevated profit levels compared to a limited company

Tax

As a sole trader you pay:

• Income Tax on profits above the personal allowance (£12,570 for 2026/27)
• Class 4 National Insurance on profits above the same threshold — 6% up to £50,270, 2% above

Class 2 NIC was abolished for most sole traders from April 2024. Voluntary Class 2 contributions at £3.65/week are still available if your profits are below the Small Profits Threshold and you want to protect your State Pension entitlement.

Reporting requirements

• Register with HMRC by 5 October following the tax year you started earning
• File a Self Assessment tax return by 31 January each year (or quarterly MTD updates if your gross self-employment income exceeds £50,000 — the threshold drops to £30,000 from April 2027)
• Pay any tax owed by 31 January, with a payment on account in July if applicable

Who chooses this?

• People starting a new business who want to keep things simple
• Freelancers, consultants, tradespeople, and creatives working on their own
• Anyone whose profits don’t yet justify the additional cost and complexity of a limited company
• People who want to test an idea before committing to a more formal structure

Read => How to Register as Self-Employed in the UK
Read => Self-Employed Tax: How It Works and What You Need to Know

Running your business as a sole trader? Members of The Self Employed Club get handpicked deals on the tools sole traders actually use — accounting software, business banking, insurance, and more. Free to join. Browse deals →

2. Limited Company

A limited company is a separate legal entity from you personally. The company owns its own assets, enters its own contracts, and is responsible for its own debts. You run it as a director and extract money via a combination of salary and dividends.

What it means in practice

You register the company at Companies House, open a business bank account in the company’s name, and run all business income and expenses through the company. At the end of each financial year, you file company accounts and a Corporation Tax return. You also file a personal Self Assessment return for your own income.

Pros

• Personal assets are legally separate from business liabilities
• More credibility with some lenders and larger clients
• Tax-efficient at higher profit levels through the salary-plus-dividends structure
• Easier to bring in investors, co-directors, or sell the business eventually

Cons

• Significantly more reporting requirements — Companies House accounts, Corporation Tax return, Confirmation Statement, director’s Self Assessment
• A simplified version of your annual accounts is publicly available at Companies House
• Most directors need an accountant — budget £500–£2,000/year
• Banks and lenders routinely require personal guarantees, limiting the liability protection in practice
• The dividend allowance has dropped to just £500/year, narrowing the historic tax advantage

Tax

• The company pays Corporation Tax on its profits — 19% on profits up to £50,000 (small profits rate), rising on a sliding scale to 25% on profits over £250,000
• You pay yourself a low salary (typically just above the NIC threshold) plus dividends
• Dividends are taxed at 8.75% (basic rate), 33.75% (higher rate), or 39.35% (additional rate) — lower than Income Tax rates but subject to the £500 annual dividend allowance

The tax advantage of a limited company has narrowed significantly since 2023, when Corporation Tax increased and the dividend allowance dropped. At current rates, incorporating generally makes financial sense once profits consistently exceed £50,000–£60,000 — below that, the admin costs typically outweigh the tax saving.

Reporting requirements

• Annual accounts filed at Companies House
• Corporation Tax return (CT600) filed with HMRC
• Annual Confirmation Statement filed at Companies House
• Director’s Self Assessment tax return
• PAYE registration if you pay yourself a salary
• Any changes to directors, shareholders, or registered address must be reported separately

Who chooses this?

• Sole traders whose profits consistently exceed £50,000–£60,000 and want to reduce their tax bill
• People who need the liability protection for the nature of their work
• Anyone planning to scale, take on employees, bring in investors, or eventually sell the business
• Those whose clients or industry expect or require limited company status

Read => Sole Trader vs Limited Company: Is It Worth Incorporating?

3. Partnership

A partnership is essentially the sole trader structure extended to two or more people. Each partner co-owns the business, shares in the profits, and is personally liable for the debts — including debts they didn’t personally agree to.

What it means in practice

The partnership itself isn’t a separate legal entity — it’s the partners collectively. You’ll want a formal partnership agreement that sets out how profits are split, how decisions are made, and what happens if one partner wants to leave. Getting this in writing upfront avoids significant problems later.

Pros

• Quick and straightforward to set up — no registration fee
• Minimal reporting requirements
• Shared costs, responsibilities, and start-up capital
• Simpler to wind down than a limited company if things don’t work out

Cons

• Each partner is personally liable for all business debts — including ones incurred by their partner
• Running a business with another person is genuinely harder than it looks
• Profits must be shared
• May not be the most tax-efficient structure at higher profit levels

Tax

• The partnership files its own tax return summarising the business income
• Each partner then reports their share of profits on their own Self Assessment return
• Each partner pays Income Tax and Class 4 NIC on their share of profits — the same taxes as a sole trader

Reporting requirements

• Register the partnership with HMRC and nominate a responsible partner for tax administration
• The partnership files an annual tax return by 31 January
• Each partner files their own Self Assessment return by 31 January

Who chooses this?

• Two or more people going into business together who want a simple shared structure
• Those who want a formal arrangement for splitting profits without the complexity of a limited company

4. Limited Liability Partnership (LLP)

An LLP combines elements of a partnership and a limited company. It’s a separate legal entity — meaning partners aren’t personally liable for the business’s debts — but it’s taxed like a partnership, with each partner paying Income Tax on their share of profits.

LLPs must have a minimum of two partners and are registered at Companies House.

What it means in practice

You get the liability protection of a limited company with the tax transparency of a partnership. It’s a more complex structure to set up and administer than a standard partnership, and annual accounts are publicly available at Companies House.

Pros

• Partners’ personal assets are protected from business liabilities
• Partners can have different levels of responsibility and profit share
• The LLP name is protected at Companies House — no other LLP can use the same name

Cons

• Annual accounts filed publicly at Companies House
• Each partner pays Income Tax on their share — at higher profit levels, this can mean paying more tax than through a limited company
• More complex and costly to set up and run than a standard partnership

Tax

• Each partner reports their share of LLP profits on their own Self Assessment return
• Tax is paid in the same way as a sole trader — Income Tax and Class 4 NIC on each partner’s share

Reporting requirements

• Annual accounts filed at Companies House
• Annual Confirmation Statement filed at Companies House
• Each partner files their own Self Assessment return
• Any changes to partners or registered office must be reported separately

Who chooses this?

• Professional partnerships (solicitors, accountants, architects, consultants) who want liability protection without incorporating as a limited company
• Two or more people going into business together who want formal liability protection and a shared structure

Which Structure Should You Choose?

For most people starting out — especially those going it alone — sole trader is the right starting point. It’s the simplest, cheapest, and easiest to understand. You can always incorporate later if your profits grow or your circumstances change, and moving from sole trader to limited company is significantly more straightforward than going the other direction.

Here’s a simple guide:

One thing worth saying clearly: the best business structure for tax purposes depends heavily on your individual circumstances — your profit level, how much you need to draw personally, whether you have other income, and more. Generic advice from the internet (including this post) is a starting point, not a substitute for proper advice on your specific numbers.

Getting Set Up as a Sole Trader

If you’ve decided sole trader is the right structure for now — which it is for most people starting out — here’s what to do next:

1. Register with HMRC as self-employed
2. Open a business bank account to keep finances separate
3. Set up a system for tracking income and expenses from day one
4. Understand what expenses you can claim to reduce your tax bill

The Self Employed Club is built for exactly this stage. Free membership, handpicked deals on the tools sole traders actually use — accounting software, banking, insurance, and more. Join free and browse the deals →

FAQs

What is the most common business structure in the UK?

Sole trader — it’s the simplest to set up and the most common choice for people going self-employed, particularly in the early stages of a business.

Do I need a limited company to run a business in the UK?

No. There’s no legal requirement to have a limited company. Many successful businesses operate as sole traders indefinitely. Here’s a full comparison of sole trader vs limited company →

What’s the difference between a sole trader and a limited company?

As a sole trader, you and your business are legally the same thing — simple, private, and lower cost to run. A limited company is a separate legal entity, offers more liability protection, and can be tax-efficient at higher profit levels — but comes with significantly more admin and cost.

When should I consider switching from sole trader to limited company?

Generally when your profits consistently exceed £50,000–£60,000, when you need stronger liability protection, or when you’re planning to scale the business significantly. Always get professional advice on your specific numbers before making the switch.

What taxes does a sole trader pay?

Income Tax on profits above the personal allowance (£12,570 in 2026/27), and Class 4 National Insurance. Full guide to self-employed tax here →

What is an LLP?

A Limited Liability Partnership — a business structure that gives partners liability protection (like a limited company) while taxing them individually on their share of profits (like a partnership). Used mainly by professional firms.

Can I change my business structure later?

Yes. Moving from sole trader to limited company is relatively straightforward. Going from limited company back to sole trader is more complex. Starting simple and incorporating when the time is right is generally the lowest-risk approach.