Comparison Guide · Updated May 2026

Sole Trader vs General Partnership UK 2026/27: Liability, Tax, Profit-Sharing, Partnership Agreements and When to Use Each

Both a sole trader and a general partnership have unlimited personal liability — your personal assets are at risk if the business fails. A sole trader operates alone; a general partnership has two or more people sharing profits and liabilities. Both are tax-transparent: profits flow through to personal Income Tax and Class 4 National Insurance via Self Assessment. The partnership's key advantage is profit- sharing flexibility and avoiding employer NI on co-working partners. Without a written agreement, the Partnership Act 1890 defaults apply (equal splits, equal management rights, automatic dissolution on death). For liability protection with partnership tax treatment, a Limited Liability Partnership (LLP)is often better. For optimised tax at higher profits, alimited company may win. This comparison covers all these trade-offs for 2026/27.

Last updated: 25 May 2026Last reviewed: 25 May 2026How we verify

At a Glance — Side-by-Side Comparison

Feature	Sole Trader	General Partnership
Legal entity	No (same as individual)	No (collection of individuals)
Liability	Unlimited — personal assets at risk	Unlimited — jointly & severally all partners
Minimum people	1	2 (no maximum)
Setup	Register HMRC as self-employed	Register HMRC + partnership + each partner SA
Profit tax	Income Tax on all profit	Income Tax on each partner's profit share
NI	Class 4 (6%/2%) on profit	Class 4 on each partner's share — no employer NI
VAT	Register if turnover >£90k	Partnership registers for VAT (not individual)
Profit sharing	All profit to sole trader	Flexible per partnership agreement
Written agreement	N/A	Not required — but strongly recommended
Dissolution	Cease trading / de-register	1890 Act defaults: death/bankruptcy dissolves; or notice
Public filing	None	None (unlike LLP/Ltd)

Tax Treatment — Self Assessment for Both

Both sole traders and partnerships pay tax through Self Assessment. The key similarity: no separate business-level tax— profits flow directly to personal Income Tax.

For a partnership, the nominated partner files an SA800 (Partnership Tax Return) and issues each partner a statement of their profit share. Each partner then includes this share on their personal SA return.

Tax comparison: 2 people, total £80,000 profit (2025/26)

Scenario	Income Tax	NI total	Grand total
Sole trader (Alex on £80k), Sam employed (£0)	~£26,432	~£2,256	~£28,688
Sole trader (£80k) + Sam on £40k salary = £120k total	~£24,432 + £7,486	~£2,256 + £3,744 empNI	~£37,918
50/50 Partnership (£40k each)	~£5,486 × 2 = £10,972	~£1,645 × 2 = £3,290	~£14,262

Estimates using 2025/26 rates. Partnership wins on lower total tax when both partners have equal contribution. No employer NI on partners.

Unlimited Liability — The Shared Risk

Both structures carry unlimited personal liability. In a general partnership, the liability is joint and several: each partner can be held personally responsible for the entire business debt, even if caused by another partner.

This is the most significant risk of the general partnership over a sole trader: you take on personal responsibility not just for your own actions but for your partners' actions in conducting partnership business.

Example: Partner A signs a contract the other partners knew nothing about, creating a £100,000 liability. All partners are jointly liable — the creditor can pursue any partner for the full £100,000.

Solution: Limited Liability Partnership (LLP)

An LLP provides the same tax-transparent treatment as a partnership but with limited liability — partners' personal assets are protected. Required to register at Companies House and file public accounts. Suitable for professional partnerships, builders, consultancies, and any multi-partner business where liability protection matters.

Partnership Agreement — What to Include

Without a written agreement, the Partnership Act 1890 defaults are very rigid and often unsuitable. A well-drafted agreement should cover:

Profit-sharing ratios: not necessarily equal; can be based on capital contributed, hours worked, or any agreed formula
Capital contributions: how much each partner contributes, and whether interest is paid on capital
Drawings: how much each partner can take out during the year (separate from profit share)
Management: decision-making, voting rights, veto powers for major decisions
New partners: process and conditions for admitting new partners
Retirement: how a partner's share is valued and paid out on retirement
Expulsion: grounds and process for removing a partner
Dissolution: how the business winds down (assets realised, debts settled, balances distributed)
Restraint of trade: non-compete clauses post-retirement

When to Choose Each Structure

Decision framework

Situation	Best structure
Working alone, low/medium turnover	Sole Trader
Working with one or more genuine co-owners	General Partnership (if low risk) or LLP
High liability risk (construction, professional advice)	LLP or Ltd Company
Want flexibility on profit-splitting	General Partnership or LLP
Profits over ~£50k each	Ltd Company with salary + dividends usually wins on tax
Professional partnership (law, accountancy)	LLP (industry norm, client trust)
Family business with two spouses	Partnership (if both genuinely active) or Ltd Company

VAT — Partnership Registers, Not Individual Partners

For VAT purposes, a partnership is treated as a single entity. The partnership (not individual partners) registers for VAT when turnover exceeds £90,000. Partners do not separately register for VAT on their profit shares.

The partnership VAT registration covers all partners' activities within the partnership business. If a partner also runs a separate sole-trader business, that business is assessed separately for VAT (with combined turnover considered for avoidance — HMRC looks at connected persons/businesses).

Related Guides

See our Sole Trader vs Limited Company comparison for when incorporation makes financial sense, or our Self-Employed Tax UK guide for Income Tax and NI on sole trader profits.

Key Sources

Frequently Asked Questions

What is the key difference between a sole trader and a general partnership?

A sole trader is a single individual running a business alone. A general partnership (under the Partnership Act 1890) is two or more people carrying on business together with a view to profit. Both structures have UNLIMITED PERSONAL LIABILITY — if the business fails, personal assets (home, savings) can be used to settle business debts. The key operational difference: in a sole trader, one person makes all decisions and keeps all profits; in a partnership, partners share profits/losses according to their partnership agreement (or equally under the 1890 Act default if no written agreement). Partnerships must have at least 2 partners; no upper limit. The partnership itself is not a separate legal entity — it is a collection of individuals (unlike a limited company, which is separate from its shareholders). Each partner is jointly and severally liable for ALL debts of the partnership — if one partner creates a debt, all partners can be pursued for the full amount.

How is a partnership taxed — does the partnership pay tax?

A UK general partnership is TAX-TRANSPARENT — the partnership itself does not pay Income Tax or Corporation Tax. Instead, each partner pays Income Tax on their individual share of the partnership profit, through Self Assessment. Each partner files their own SA return and includes a share of the partnership profits on the partnership pages (SA800 is filed by the nominated partner; each partner gets a K1-style statement of their profit share). Each partner is separately liable for: (1) INCOME TAX on their profit share at 20%/40%/45%; (2) CLASS 4 NATIONAL INSURANCE on their profit share (6% on profits £12,570-£50,270; 2% above £50,270); (3) CLASS 2 NI effectively subsumed into the Class 4 system for 2024/25 onwards. The partnership does NOT pay employer NI on partner profit drawings — partners are not employees of the partnership. Crucially: if a partner receives a salary from the partnership, this is NOT an employment salary for tax purposes — it is just a profit allocation (drawings) and is taxed as self-employment income.

What is the tax difference between sole trader and partnership for two people with equal profits?

SCENARIO: Two people, Alex and Sam, each work together in a business generating £100,000 total profit. OPTION A — Alex sole trader, Sam employed: Alex pays IT + Class 4 NI on £100,000 profit. Sam earns a salary (say £50,000) paid by Alex's business. Alex pays employer NI (13.8%) on Sam's salary — approximately £5,155/year. Alex deducts Sam's salary as a business expense. Alex's profit = £100,000 − £50,000 = £50,000. Total IT+NI: Alex pays on £50,000 + employer NI £5,155. OPTION B — General Partnership, 50/50 split: Each partner takes £50,000 profit share. Each pays IT on £50,000 + Class 4 NI individually. NO employer NI (partners are not employees). Partnership structure saves Alex the £5,155 employer NI. At £50,000 each: Class 4 NI = (£50,000 − £12,570) × 6% = £2,245.80 + (nothing above £50,270 at this level) = £2,245.80 each. CONCLUSION: The partnership structure saves employer NI on co-workers who are genuine joint business owners (not employees). However, if the person is truly an employee (not a co-owner), HMRC may challenge a partnership arrangement as a sham.

Show 4 more questions

Do I need a written partnership agreement?

No — a written partnership agreement is not a legal requirement in the UK. A partnership can exist by verbal agreement or by conduct (two people behaving as partners is enough under the Partnership Act 1890). However, WITHOUT a written agreement, the Partnership Act 1890 defaults apply: (1) all partners share profits and losses EQUALLY (regardless of capital contributed or hours worked); (2) all partners have equal rights to participate in management; (3) no partner is entitled to a salary (all drawings are profit shares); (4) no interest is payable on capital contributions; (5) the partnership dissolves on the death or bankruptcy of any partner; (6) any partner can dissolve the partnership by giving notice at any time. These defaults are frequently unsuitable for real-world arrangements. A WRITTEN PARTNERSHIP AGREEMENT should address: profit-sharing ratios; capital contributions and interest; partners' drawings; management decisions (voting, veto rights); admission of new partners; retirement and exit procedures; restraint of trade; dispute resolution. A solicitor or accountant should draft the agreement — cost typically £500-£2,000 depending on complexity.

What is a Limited Liability Partnership (LLP) and how does it differ?

A Limited Liability Partnership (LLP) is a corporate structure introduced by the Limited Liability Partnerships Act 2000. It combines features of a partnership and a limited company: (1) LIMITED LIABILITY — like a limited company, an LLP is a separate legal entity. Members' (partners') personal liability is limited to their agreed capital contribution. Unlike a general partnership, personal assets are protected. (2) TAX TRANSPARENT — like a general partnership, an LLP is tax-transparent. Members pay Income Tax on their profit shares (not Corporation Tax). (3) REGISTERED AT COMPANIES HOUSE — an LLP must register at Companies House, file annual accounts (publicly available), and has a similar administrative burden to a limited company. (4) MINIMUM MEMBERS — at least 2 designated members (responsible for admin obligations). (5) WHEN TO USE: professional firms (law, accountancy, medicine) where partners want personal liability protection but prefer partnership tax treatment. Legal sector and large accountancy firms typically use LLP structure. (6) LLP vs LIMITED COMPANY: Ltd company offers more flexibility on dividends, Corporation Tax planning, and shares. LLP is simpler for professional partnerships and preferred where professional rules require partnership structure.

Can a spouse or family member be a partner to reduce tax?

Yes — family members can be genuine partners in a partnership, and this is a legitimate tax planning strategy if: (1) the family member is a GENUINE PARTNER — they actively work in the business, take on liability, and participate in management; (2) the profit split is COMMERCIALLY JUSTIFIABLE — HMRC expects profit shares to reflect the economic contribution of each partner (hours, skills, capital). A 50/50 split where one partner works full-time and the other does nothing would be challenged under HMRC's income-shifting rules and the Arctic Systems case (though the case established that spouses in a genuine commercial partnership are not automatically suspect). (3) A WRITTEN AGREEMENT is even more important for family partnerships to evidence the genuine commercial nature. WHAT HMRC CHALLENGES: a sole trader who gives a nominal salary to a spouse to shift profits to their lower personal allowance — this is income-shifting and can be challenged. A genuine partner who provides capital, takes on liability and performs agreed services is different. TAX BENEFIT: if Spouse A is a higher-rate taxpayer (40%) and Spouse B is a basic-rate taxpayer (20%), shifting £20,000 of profit to Spouse B saves 20% × £20,000 = £4,000/year in income tax (plus NI differences). The shift must be based on genuine economic contribution, not just a tax avoidance structure.

How does a general partnership compare to a limited company for two co-founders?

SCENARIO: Two co-founders, total business profit £200,000 (£100,000 each). GENERAL PARTNERSHIP: Each partner pays Income Tax on £100,000 profit share. At £100,000: Personal Allowance £12,570 lost (high-income restriction applies partially). Tax: approximately £38,000 each (based on 2025/26 rates). Class 4 NI: (£50,270 − £12,570) × 6% + (£100,000 − £50,270) × 2% = £2,262 + £994.60 = £3,256.60 each. Total tax per person: ~£41,257. No employer NI on partners. LIMITED COMPANY (£100k salary each): Each director on £100k salary pays PAYE tax + employee NI. Company pays employer NI. After all taxes, effective rate higher due to double-NI. ALTERNATIVE LIMITED COMPANY (optimal salary + dividends): Each director takes £12,570 salary + dividends. Company pays 25% Corp Tax on profit (£200k × 25% = £50k tax). Remaining profit distributed as dividends — 33.75% higher-rate dividend tax. Total extraction efficiency depends on details but typically better than partnership at high profit levels due to Corp Tax at 25% vs IT at 40-45%. CONCLUSION: partnership is simpler and better at lower profit levels (under ~£50k each); Ltd company with salary + dividends wins at higher profits due to Corporation Tax arbitrage. LLP provides liability protection with partnership tax treatment.

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About the author

Emma Clarke

UK Tax Writer

Emma Clarke has been writing about UK personal tax since 2018, with a particular focus on Self Assessment, PAYE coding and the practical mechanics of how HMRC actually applies the rules to ordinary salaries. Her work concentrates on translating the dense language of HMRC manuals and Finance Act schedules into worked examples that show, pound by pound, how income tax and National Insurance reduce a gross salary to the figure that lands in a UK bank account. Emma covers the full PAYE lifecycle: tax codes (1257L, BR, K codes, emergency codes), the Marriage Allowance, the High Income Child Benefit Charge, salary sacrifice arrangements and their effect on pensionable pay, the Apprenticeship Levy, and the differences between the rUK and Scottish income-tax regimes. She is particularly interested in the edge cases that catch PAYE employees out — the £100,000 personal-allowance taper, the 60% effective marginal rate it creates, and the interaction between student-loan plans and pension contributions. Every figure in Emma's articles is verified against the current HMRC rates pages and worked through a Self Assessment calculation by hand before publication. She writes to CalcHub's editorial standards: primary-source citations, plain English, no promotional language, and clear "this is general information, not financial advice" disclaimers where appropriate.

Personal-finance writer since 2018
UK tax specialism — PAYE, Self Assessment, National Insurance
Writes to CalcHub editorial standards (primary-source citation, annual review)

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