Business partnership: what it means in United Kingdom law, the three forms and the liability nobody expects

Search for "business partner" and you get two unrelated things. In an HR department it is an internal job title, the person who sits with one part of the business and owns the people consequences of its plan. In law and in commerce it means something else: two or more people carrying on a business together, sharing the profits and, in the form most people fall into by accident, sharing the debts out of their own pockets. This article is about the second one, the legal and commercial structure, under United Kingdom law. A partnership employs people like any other business, and the appraisals still have to get finished whatever sits on the headed paper, so see how New Dynamics performance reviews run a cycle for a firm of fifteen or five hundred. If you arrived wanting the HR job title, read the HR business partner role and ignore the rest of this page.

Everything below is general information about United Kingdom law and tax, read from the official sources on 6 November 2026. It is not legal, tax or accounting advice. Take advice before you form a partnership, and again before you change one. These structures decide who pays when a contract goes wrong.

What a business partnership is: the one-sentence definition

The definition has not changed since 1890, and it is shorter than people expect. Section 1(1) of the Partnership Act 1890 says:

"Partnership is the relation which subsists between persons carrying on a business in common with a view of profit."

Read it again, because three things are missing. There is no document. There is no registration. There is nobody you have to tell. A partnership is a relation, not a thing you create by filing a form. Two people who start selling something together and split what is left are in a partnership whether or not either has used the word.

Each phrase carries weight. "Business" is defined broadly in section 45: the expression "includes every trade, occupation, or profession". "In common" means the business is carried on for the benefit of all of them, not one person's business with the others helping.

Section 4 names the collective: "Persons who have entered into partnership with one another are for the purposes of this Act called collectively a firm". One Scottish difference appears here and matters later. Section 4(2) provides that "In Scotland a firm is a legal person distinct from the partners of whom it is composed". In England, Wales and Northern Ireland it is not. The firm is the partners.

What is not a partnership

Section 2 exists because people kept arguing about this in court. Joint ownership of property "does not of itself create a partnership", even where the owners share what it earns, and nor does sharing gross returns. A share of profits is "primâ facie evidence that he is a partner", but a profit share paid to an employee, or a loan at interest varying with profits, does not make the recipient one.

How many partnerships there are

Partnerships are a shrinking minority of British business. The business population estimates for the UK and regions 2026 statistical release, from the Department for Business, Innovation, Science and Trade on 5 November 2026, reports that at the start of 2026 "the UK private sector business population comprised 3.1 million sole proprietorships (55% of the total), 2.2 million actively trading companies (39%) and 343,000 ordinary partnerships (6%)", of which 77,000 were employers. The release defines an ordinary partnership as "an unincorporated business run by 2 or more self-employed people", so LLPs are counted under companies, and its status "remains as official statistics in development".

The three forms of partnership in United Kingdom law

Most confusion comes from one word covering three structures with different consequences.

1. A general partnership, sometimes called an ordinary partnership, governed by the Partnership Act 1890. No registration at Companies House, no public filing, and each partner personally liable for the firm's debts.
2. A limited partnership, governed by the Limited Partnerships Act 1907. Registered at Companies House, with at least one general partner carrying full liability and limited partners capped at what they put in, provided they stay out of management.
3. A limited liability partnership, usually written LLP, governed by the Limited Liability Partnerships Act 2000. A body corporate with its own legal personality, which files accounts at Companies House, and whose members are not personally liable for its debts.

The extent of each Act is worth stating rather than assuming. The Partnership Act 1890 extends to England and Wales, Scotland and Northern Ireland. So does the Limited Partnerships Act 1907: legislation.gov.uk records that the Act, as in force in Great Britain, was extended to Northern Ireland on 1 October 2009 by section 1286(2)(b) of the Companies Act 2006. And section 19(4) of the Limited Liability Partnerships Act 2000, itself substituted on that same date, says in terms: "This Act extends to the whole of the United Kingdom."

A general partnership under the Partnership Act 1890

This is the default form, and the one people are in without choosing it. There is nothing to register at Companies House, only with HM Revenue and Customs. GOV.UK's guidance on how to set up a business partnership states the whole obligation in three lines: choose a name, choose a "nominated partner", and register with HMRC. It defines the role plainly: "The 'nominated partner' is responsible for managing the partnership's tax returns and keeping business records."

On liability, which gets its own section below, GOV.UK does not soften it: "In a partnership, you and your partner (or partners) personally share responsibility for your business", including "any losses your business makes" and "bills for things you buy for your business, like stock or equipment". It also notes that "A partner does not have to be an actual person", so a limited company can be a partner too.

A limited partnership under the Limited Partnerships Act 1907

A limited partnership is a general partnership with a second class of partner bolted on by statute. Section 4(2) requires that it "must consist of one or more persons called general partners, who shall be liable for all debts and obligations of the firm", and "one or more persons to be called limited partners". Section 4(2A) caps the limited partner's exposure: a limited partner, other than in a private fund limited partnership, must "contribute to the partnership a sum or sums as capital or property valued at a stated amount", and "shall not be liable for the debts or obligations of the firm" beyond the amount so contributed.

Registration is compulsory. Section 5 says "Every limited partnership must be registered as such in accordance with the provisions of this Act". GOV.UK's guidance on how to set up and run a limited partnership gives the mechanics: the application goes to Companies House by post with a fee of £71, all partners must sign, and registration usually follows "within 5 days of getting your application". Until then the protection does not exist, because "All partners are equally responsible for any debts or obligations until the partnership has been registered."

The management trap in section 6(1)

This is the provision that catches people. Section 6(1) begins: "A limited partner shall not take part in the management of the partnership business, and shall not have power to bind the firm". A limited partner may inspect the books and "advise with the partners thereon", but no further. The sanction follows in the same subsection: "If a limited partner takes part in the management of the partnership business he shall be liable for all debts and obligations of the firm" incurred while taking part in the management "as though he were a general partner". GOV.UK says the same plainly: a limited partner "cannot manage the business" and "cannot remove your original contribution". An investor who starts making operational decisions has given up the protection they paid for.

The 1890 Act does not stop applying either: section 7 applies it, and "the rules of equity and of common law applicable to partnerships", to limited partnerships.

One live caveat. The Economic Crime and Corporate Transparency Act 2023 rewrites large parts of the 1907 Act, adding registered office and email requirements, identity verification and annual confirmation statements. On legislation.gov.uk most of those amendments are still marked prospective, so check the current Companies House guidance before relying on them.

A limited liability partnership under the Limited Liability Partnerships Act 2000

An LLP is not a partnership with better insurance. It is a different legal animal that borrows the tax treatment of a partnership. Section 1 of the Limited Liability Partnerships Act 2000 creates it as such: "There shall be a new form of legal entity to be known as a limited liability partnership", described in subsection (2) as "a body corporate (with legal personality separate from that of its members) which is formed by being incorporated under this Act". Subsection (5) then draws the line: "except as far as otherwise provided by this Act or any other enactment, the law relating to partnerships does not apply to a limited liability partnership." So the Partnership Act 1890 does not govern an LLP, and nothing in this article about joint liability, dissolution on death or the 1890 defaults applies to one.

Incorporation looks like a company's. GOV.UK's guidance on how to set up and run a limited liability partnership requires two or more members, a name ending in "Limited Liability Partnership" or "LLP", an appropriate registered office address and registered email address in the United Kingdom, at least two designated members, an LLP agreement and registration with Companies House, at a stated £100 using software, £124 on paper or £156 same day. Designated members carry the filing burden: Self Assessment registration, VAT above £90,000 of sales, accounting records, and the duty to "prepare, sign and send annual accounts to Companies House" with a confirmation statement. GOV.UK warns that they "can be prosecuted if they do not meet their legal obligations".

Limited liability is not unconditional. Section 4A provides that where an LLP carries on business with fewer than two members for more than six months, a member who knows that and stays is "liable (jointly and severally with the limited liability partnership) for the payment of the limited liability partnership's debts contracted during the period". And where a member is personally liable for a wrongful act in the course of the LLP's business, section 6 makes the LLP "liable to the same extent as the member", so limited liability protects members from the entity's debts, not from their own negligence.

Joint and several liability: the part nobody understands until it matters

Here is the provision that ends friendships. Section 9 reads:

"Every partner in a firm is liable jointly with the other partners, and in Scotland severally also, for all debts and obligations of the firm incurred while he is a partner; and after his death his estate is also severally liable in a due course of administration for such debts and obligations, so far as they remain unsatisfied, but subject in England or Ireland to the prior payment of his separate debts."

You are liable for the whole debt, not your share. In a general partnership there is no cap and no shield. A creditor of a two-partner firm facing a £400,000 shortfall is not politely owed £200,000 by each of you; the firm's debt is enforceable against the partners. Note the Scottish difference in the section: there, partners are liable severally as well as jointly, following from the firm being a legal person under section 4(2).

You are liable for what your partner did without asking you. Section 5 makes "Every partner" an agent of the firm and the other partners, so the acts of any partner "who does any act for carrying on in the usual way business of the kind carried on by the firm" bind the firm and the partners, unless that partner had no authority and the other side knew it. Your partner's signature on a supply contract is your signature. For wrongs rather than contracts, section 12 is blunter: "Every partner is liable jointly with his co-partners and also severally for everything for which the firm while he is a partner therein becomes liable" under the sections on wrongful acts and misapplied money.

Leaving does not clear the slate. Section 17 provides that "A partner who retires from a firm does not thereby cease to be liable for partnership debts or obligations incurred before his retirement", although an incoming partner "does not thereby become liable to the creditors of the firm for anything done before he became a partner". A retiring partner can be released, but only by agreement "between himself and the members of the firm as newly constituted and the creditors", and creditors have no reason to sign.

What a partnership agreement should settle

The Act contains a complete set of default terms for partners who never wrote anything down: somebody else's answers, written in 1890, to questions you have never discussed. Section 19 is the hinge: "The mutual rights and duties of partners, whether ascertained by agreement or defined by this Act, may be varied by the consent of all the partners".

Profit shares. Section 24 starts from strict equality: "All the partners are entitled to share equally in the capital and profits of the business, and must contribute equally towards the losses whether of capital or otherwise sustained by the firm." That holds even where one partner put in all the money.

Decisions. Section 24(5) says "Every partner may take part in the management of the partnership business". Section 24(8) splits decisions in two: "Any difference arising as to ordinary matters connected with the partnership business may be decided by a majority of the partners, but no change may be made in the nature of the partnership business without the consent of all existing partners." So a majority runs the business while one partner can veto a change of direction, or a new partner under section 24(7). Write down what happens when a two-partner firm deadlocks, because the Act has no answer to a tie.

Drawings and capital. Section 24(6) is the one that shocks new partners: "No partner shall be entitled to remuneration for acting in the partnership business." There is no salary by default. Agree monthly drawings, and what happens when profits do not support them.

Expulsion and exit. Section 25 is one sentence with large consequences: "No majority of the partners can expel any partner unless a power to do so has been conferred by express agreement between the partners." Without an expulsion clause you cannot remove a partner who is damaging the firm, however the others vote; the remaining route is a court application under section 35. In the other direction, section 26 lets any partner in a firm with no fixed term "determine the partnership at any time on giving notice", and section 32 dissolves it on that notice. No notice period, no cooling-off. One email can dissolve the firm.

Death. Section 33 is the default most people would never choose: "Subject to any agreement between the partners, every partnership is dissolved as regards all the partners by the death or bankruptcy of any partner." A three-partner firm where one partner dies is dissolved, not reduced to two. A continuation clause, a valuation method and a funded buyout are what stop a bereavement from closing the business, because section 42 otherwise leaves the estate choosing between post-dissolution profits and five per cent interest on its share of the assets.

For an LLP the same questions arrive through a different document. GOV.UK says you "should make an LLP agreement with any other members as part of setting up your LLP", covering "how profits are shared among members", "who needs to agree decisions", "members' responsibilities" and "how members can join or leave the LLP". It adds that "You can find a solicitor to help you prepare an agreement, or you can write your own". Take the first option: a partnership agreement is the clearest example of a document where general information is not enough.

How partners are taxed: self-employed, not payroll

A partnership is not taxed as a business. Its profits are taxed in the hands of the partners, each of whom is self-employed. Section 848 of the Income Tax (Trading and Other Income) Act 2005 states the principle: "Unless otherwise indicated (whether expressly or by implication), a firm is not to be regarded for income tax purposes as an entity separate and distinct from the partners."

The same treatment reaches LLPs even though they are bodies corporate. Section 863 provides that where an LLP carries on a trade, profession or business with a view to profit, "all the activities of the limited liability partnership are treated as carried on in partnership by its members (and not by the limited liability partnership as such)". That is why an LLP member takes a profit share and files a Self Assessment return rather than appearing on a payroll.

1. The nominated partner registers the partnership. GOV.UK: "You must register your partnership for Self Assessment with HM Revenue and Customs (HMRC) if you're the 'nominated partner'", which means "you're responsible for sending the partnership tax return".
2. Every partner registers separately. The guidance is explicit that "The other partners need to register separately" and "All partners also need to send their own tax returns as individuals".
3. The deadline is 5 October in the second tax year. GOV.UK: "You must register by 5 October in your business's second tax year, or you could be charged a penalty." Forms SA400 and SA401 cover it where you cannot register online.
4. Check VAT. Registration is compulsory "if your VAT taxable turnover is more than £90,000", and voluntary below that.
5. Then the returns. GOV.UK's Self Assessment guidance lists being "a partner in a business partnership" among the circumstances in which you must send a tax return, whatever you earned.

National Insurance follows the self-employed rules. GOV.UK's guidance on self-employed National Insurance rates states that for the 2026 to 2027 tax year Class 4 contributions are "6% on profits over £12,570 up to £50,270" and "2% on profits over £50,270", and that Class 2 contributions are treated as paid where profits are £7,105 or more. Thresholds change every year, so check the current figures.

One penalty deserves its own sentence. On late filing, GOV.UK says: "All partners will be charged a penalty if a partnership tax return is late." One partner's missed deadline is everybody's £100, plus the daily penalties that follow. Our post on employment status covers who in your business is self-employed, and payroll services for a small business the mechanics once you have a payroll. This remains general information, not tax advice.

What a partnership means for the people it employs

A partnership can employ staff, and those employees are in the ordinary position of employees. The structure above them changes little about their rights and a great deal about who carries the obligations.

The partners are not on the payroll; the staff are. Section 24(6) removes any default entitlement to partner remuneration, and partners pay tax through Self Assessment. Employees are different. You must register as an employer with HMRC and, as GOV.UK's guidance on registering as an employer puts it, "You must register before the first payday to get your employer PAYE reference number." GOV.UK's steps to take before employing someone adds the National Minimum Wage, employer National Insurance, sick pay, pension duties, parental pay, discrimination and health and safety obligations, and employers' liability insurance.

Members of an LLP sit in a stranger position. Section 4(4) of the Limited Liability Partnerships Act 2000 says a member is not to be "regarded for any purpose as employed by the limited liability partnership" unless they would have been had the members been partners in a partnership. A test rather than an answer, and a question for advice.

Appraisals do not care about your legal form. A firm of fifteen with two partners has the same completion problem as a company of fifteen with two directors: a cycle in a spreadsheet and a Word form, a mid-year that quietly does not happen, and nobody with time to do the chasing. It is often harder in a partnership, because the partners are owners rather than managers and central HR is one person doing three jobs. The wider picture on headcount and turnover sits in our HR statistics hub, and the mechanics of running a cycle without chasing in New Dynamics workflows. Partner performance is governed by the agreement, not a contract of employment, so no escalation route exists unless the agreement creates one.

The honest warning: a handshake defaults to the 1890 Act

Put the three facts together. A partnership exists as soon as people carry on a business in common with a view of profit. The terms of a partnership with no written agreement are supplied by an Act passed in 1890. And liability for the firm's debts in that default form reaches the partners personally.

So the typical accidental partnership runs on these terms, whether anybody has read them or not. Profits split equally regardless of what each partner contributed. No salary for anyone. No power to expel a partner who stops working. Dissolution on one partner's notice, with no notice period, and on a partner's death, with no continuation and no agreed valuation. Full personal liability for debts your partner incurred without consulting you. Every partner carrying a penalty when one files the return late.

None of those defaults is a scandal. Each is a defensible answer to a question the partners never asked. The problem is that they come into force by silence, while the business is going well and nobody wants to raise the awkward hypothetical. Decide which form you want before you trade, get the agreement drafted by somebody qualified to draft it, register what has to be registered on time, and take legal, tax and accounting advice on all of it. This article is general information about United Kingdom law as it stood on 6 November 2026. We do not recommend, rank or price any firm or adviser.

Frequently asked questions

What is a business partnership?

A relation rather than a registered entity. Section 1(1) of the Partnership Act 1890 defines it as "the relation which subsists between persons carrying on a business in common with a view of profit", and section 45 defines business as including "every trade, occupation, or profession". No document or registration creates one, although the partnership and each partner must register with HMRC. General information, not legal advice.

How is a business partnership different from an HR business partner?

They are unrelated. A business partnership is a legal and commercial structure in which two or more people carry on a business together and share the profits. An HR business partner is an internal job title inside a human resources function, held by someone accountable for the people consequences of one business area's plan. Our post on the HR business partner role covers the job title.

What are the three types of business partnership in the United Kingdom?

A general or ordinary partnership under the Partnership Act 1890, with no Companies House registration and personal liability for the firm's debts. A limited partnership under the Limited Partnerships Act 1907, registered at Companies House, with at least one fully liable general partner and limited partners capped at their contribution if they take no part in management. And a limited liability partnership under the Limited Liability Partnerships Act 2000, a body corporate whose members are not personally liable.

Are partners personally liable for the partnership's debts?

In a general partnership, yes. Section 9 of the Partnership Act 1890 makes every partner "liable jointly with the other partners, and in Scotland severally also, for all debts and obligations of the firm incurred while he is a partner". Section 5 makes each partner an agent of the firm, so one partner's contract binds the others, and section 17 keeps a retiring partner liable for earlier debts unless the creditors release them.

How are business partners taxed?

As self-employed individuals, not through payroll. The Income Tax (Trading and Other Income) Act 2005 provides that a firm "is not to be regarded for income tax purposes as an entity separate and distinct from the partners", and section 863 applies the same treatment to LLP members. The nominated partner files the partnership return, every partner files their own Self Assessment return, and registration is due by 5 October in the business's second tax year. Not tax advice: check the current rates and take advice.

Do you need a written partnership agreement?

Legally, no. Practically, yes. Without one, the Partnership Act 1890 supplies the terms: equal profit shares under section 24(1), no remuneration under section 24(6), no power to expel a partner under section 25, dissolution on any partner's notice under section 32, and dissolution on a partner's death or bankruptcy under section 33. Section 19 allows those to be varied by consent, which is what an agreement does. Have one drafted before you trade.

Your next step: decide the form before you trade

1. Work out which form you are in. If two or more of you are carrying on a business in common with a view of profit and nothing has been registered, that is a general partnership under the Partnership Act 1890, with personal liability attached.
2. Get an agreement drafted. Profit shares, decision thresholds, drawings, outside work, notice periods, expulsion, death and a valuation method. Take legal advice rather than adapting a template.
3. Register what the form requires, on time. HMRC for a general partnership and every partner in it, Companies House for a limited partnership or an LLP, VAT above the threshold, and PAYE before the first payday.
4. Check the moving parts. The Economic Crime and Corporate Transparency Act 2023 changes to limited partnerships are being commenced in stages, so confirm the current Companies House position before you file.
5. Decide how partner and staff performance will be reviewed, and write the partner half into the agreement, because no manager sits above a partner by default.

For a way to run the cycle for the staff a partnership employs, read and download our performance review guide. The guide is free to read, and the PDF uses our short download form.

Want your appraisals to finish without a partner spending December chasing them? Book a New Dynamics demo and send us the review form you use today, or email contact@new-dynamics.com.