Registering a Partnership: Options and Process

Choosing to set up a partnership is a big decision, whether you’re going into business with family, friends, or colleagues. The rules, registration process, and risks are very different from going it alone as a sole trader or setting up a limited company. This guide gives UK small business owners the complete, no-nonsense lowdown on partnership types, registration steps, ongoing requirements, and what to watch out for. By the end, you’ll know exactly how to register a partnership that’s right for you — and avoid the costly mistakes many make.

Before you can register your partnership, it’s essential to understand the three main types of partnership recognised in UK law: the 'ordinary partnership', the 'limited partnership' (LP), and the 'limited liability partnership (LLP)'. Each comes with very different legal structures, liabilities, and administrative requirements.

An ordinary partnership is the simplest structure, governed by the Partnership Act 1890. Here, two or more people share responsibility for the business, including profits, losses, and liabilities. There is no legal separation between the business and the partners. This means each partner is personally liable for all business debts — even those incurred by other partners.

A limited partnership introduces two classes of partner: 'general partners', who run the business and hold unlimited liability, and 'limited partners', who contribute capital but have liability only up to the amount they invest. Limited partnerships are regulated by the Limited Partnerships Act 1907 and are less common for standard small businesses, but can be useful for certain investment or property arrangements.

A limited liability partnership (LLP) is a more modern structure, introduced in 2001, and is popular with professional services (such as accountants and solicitors). LLPs are a legal entity separate from their members, and partners’ liability is usually limited to their capital contribution. However, LLPs are required to register with Companies House and face stricter reporting and tax obligations.

• Ordinary Partnership: Simple, flexible, but unlimited personal liability.
• Limited Partnership: Allows for 'silent' investors with limited liability, but at least one general partner must have unlimited liability.
• LLP: Legal entity, limited liability for all members, Companies House registration required.

Choosing a partnership structure is not just about paperwork — it profoundly affects risk, tax, control, and succession. Partnerships are popular with businesses that value flexibility and personal relationships, but there are clear trade-offs compared to sole trader or limited company status.

On the plus side, partnerships are generally easier and cheaper to set up than companies. They allow for shared responsibility, pooled resources, and a broader skill set. Profits can often be split flexibly, and partnerships are not generally subject to Corporation Tax; instead, each partner is taxed individually on their share of profit.

However, the biggest downside — particularly with ordinary partnerships — is unlimited personal liability. If the partnership can’t pay its debts, partners can be pursued personally, including for debts caused by another partner’s actions. Partners can also face disputes, especially if there’s no written agreement. LLPs address the liability issue, but at the cost of higher admin and public disclosure.

• Simple set-up, minimal paperwork (especially for ordinary partnerships)
• Shared decision-making and pooled expertise
• Flexibility in profit-sharing arrangements
• Unlimited liability for ordinary partnerships (serious risk to personal assets)
• LLPs and LPs face increased registration and reporting costs
• Potential for disputes if roles and expectations are not clearly set out

Registering an ordinary partnership is far less formal than registering a company or LLP. There is no requirement to register the partnership itself with Companies House, but each partner must register as self-employed with HMRC — usually within three months of starting trading, to avoid penalties.

You’ll need to choose a business name, though you can trade under the partners’ names (e.g. 'Smith & Jones'). If you opt for a business name, it must not be offensive, misleading, or too similar to existing names, and certain words (like 'bank' or 'insurance') are restricted or require permission. There are also disclosure requirements — your partnership name and address must appear on business documents, invoices, and the website.

Each partner is individually responsible for their own Income Tax and National Insurance Contributions (NICs) on their share of profits. The partnership as a whole must also file a Partnership Tax Return (SA800) each year, detailing profits and how they are split. This is in addition to each partner’s personal Self Assessment tax return.

While there is no legal obligation to have a written partnership agreement, it’s highly recommended. The default rules under the Partnership Act 1890 are very basic, and can lead to unintended consequences — for example, equal profit sharing regardless of investment or effort, and automatic dissolution if a partner leaves or dies.

• Register with HMRC as soon as you start trading to avoid fines
• Nominate one partner to deal with Partnership Tax Returns
• Keep clear records of partner contributions and drawings
• Disclose partnership name and address on all official documents

Limited partnerships are less common among standard UK businesses, but are sometimes used for investment vehicles or property ventures. The big attraction is that limited partners (those who only invest, not manage) have liability only up to the amount they contribute. However, at least one general partner must have unlimited liability and be responsible for the day-to-day running.

To register a limited partnership, you must submit form LP5 to Companies House, either online or by post. You’ll need to provide details of all partners, the business address, nature of the business, and the split between general and limited partners. There’s a one-off fee of £20 (as of 2026). Unlike LLPs, LPs do not file annual accounts or returns to Companies House, but do have to update Companies House if the partnership’s details change.

Taxation of limited partnerships is similar to ordinary partnerships: the partnership is not taxed itself, but each partner is taxed individually on their share of profits. Both general and limited partners must register for Self Assessment with HMRC, and the partnership should file an SA800 Partnership Tax Return each year.

It’s especially important to have a robust written agreement in an LP, as the division between general and limited partners can easily lead to disputes or confusion over roles and liability.

• Form LP5 is required for Companies House registration
• General partners have unlimited liability; limited partners have liability capped at their investment
• Notify Companies House of any changes in partners or business address
• All partners must register with HMRC and file tax returns

LLPs are increasingly popular for small businesses that want the flexibility of a partnership but protection against personal liability. An LLP is a distinct legal entity, so it can own assets, enter contracts, and employ staff in its own right. Members (partners) are generally only liable for the amount they invest or guarantee.

To register an LLP, you must submit an incorporation application (LL IN01) to Companies House, either online or by post. This requires at least two designated members, who take on additional legal responsibilities. You’ll need a registered office address and must choose a name that complies with Companies House rules (ending in 'LLP'). There is a registration fee of £40 (paper) or £12 (online, as of 2026).

Unlike ordinary and limited partnerships, LLPs are subject to Companies House filing requirements. This includes submitting annual accounts, a confirmation statement (previously annual return), and notifying Companies House of any changes. Failure to comply can result in fines or the LLP being struck off the register.

For tax, LLPs are treated like partnerships: the LLP itself does not pay tax, but each member is taxed on their individual share of profits. However, if the LLP is deemed 'not carrying on a business with a view to profit', HMRC may treat it differently — so it’s vital to have clear evidence of trading activity.

• Register online at Companies House for quickest processing
• Appoint at least two designated members to handle legal filings
• File annual accounts and confirmation statements on time — deadlines are strict
• Maintain a registered office address in the UK

LLPs must keep up with more ongoing admin. For example, missing the accounts filing deadline leads to automatic penalties starting at £150 and increasing sharply. Designated members are legally responsible for ensuring compliance. Many LLPs also choose to have a formal LLP agreement (not legally required, but highly recommended) to manage profit sharing, roles, and dispute resolution.

No matter which partnership structure you choose, tax and compliance are serious business. For most partnerships (including LLPs), the partnership itself does not pay tax. Instead, each partner is taxed on their share of the profits as if they were self-employed. This means filing a Self Assessment tax return (SA100), and paying Income Tax and Class 2 and Class 4 National Insurance Contributions on profits above the relevant thresholds.

The partnership must also file an annual Partnership Tax Return (SA800), showing total profits and how they are split among partners. For LLPs, this is in addition to Companies House filings. Partners in an LLP or LP still need to register as self-employed with HMRC, unless they are not UK resident or are only silent investors in certain LPs.

If your partnership turnover exceeds the VAT registration threshold (£85,000 in 2026/27), you must register for VAT and file quarterly returns. If you employ staff, you’ll need to register as an employer with HMRC and operate PAYE, pay at least the National Minimum Wage, and meet pension auto-enrolment duties.

• Register for VAT if turnover will exceed the threshold
• Keep accurate records for at least 5 years after the tax year
• Register as an employer before paying any staff
• Pay partners through drawings (not salary, unless the LLP employs them)

Although UK law does not require a written partnership agreement, skipping this step is a recipe for disaster. Without one, your business will default to the Partnership Act 1890 — which, while historic, rarely matches the needs of modern businesses. For example, all profits and losses are split equally, regardless of effort or investment, and the partnership is dissolved automatically if a partner leaves or dies.

A good partnership agreement sets out exactly how profits are shared, who contributes what, how decisions are made, and what happens if there’s a dispute or a partner wants to leave. It can cover working hours, holidays, capital contributions, dispute resolution, and even how to value the business if a partner exits.

For LLPs, while an agreement is not legally required, Companies House and most banks will expect one. It’s also vital for attracting investors or new members. For LPs, the agreement is critical to clarify the roles and liability split between general and limited partners.

• Profit and loss sharing arrangements
• Decision-making and dispute resolution processes
• Partner roles, responsibilities, and exit procedures
• Rules for admitting new partners or removing existing ones
• What happens if a partner dies or becomes incapacitated

Even experienced business people can stumble when setting up a partnership. The most frequent error is assuming the process is 'just paperwork' — when in fact, the choices you make now can determine whether your business survives disputes or crisis. Here are some of the most common mistakes, and how to avoid them.

Many partnerships forget to register all partners for Self Assessment, leading to fines or tax issues down the line. Others fail to file the Partnership Tax Return (SA800), not realising it is required even if there is no profit or trading activity. For LLPs, missing Companies House deadlines is a fast track to penalties and even being struck off.

Not having a written agreement is by far the biggest risk. Without one, you’re subject to default rules that rarely suit modern business — and personal and financial disputes can quickly escalate. It’s also common for partners to misunderstand their personal liability, especially in ordinary partnerships, leading to ruined credit or legal action if things go wrong.

• Failing to register all partners with HMRC for Self Assessment
• Missing the annual SA800 Partnership Tax Return deadline
• Assuming a partnership offers limited liability when it does not
• Not updating Companies House when details change (LLP/LP)
• Skipping a written partnership agreement
• Not understanding VAT or PAYE registration triggers

Registering a partnership is only the start. You also need to run the business in line with UK law, keep up with tax and filing deadlines, and protect your business and personal interests. This means setting up robust record-keeping, getting the right insurance, and planning for changes in your partnership.

You’ll need to keep detailed financial records for at least five years after the tax year. This includes sales, expenses, drawings, and capital contributions. If you take on staff, you must register for PAYE, pay at least the National Minimum Wage, and enrol eligible employees in a pension scheme under auto-enrolment rules. You also need to comply with data protection (ICO registration), health and safety (HSE), and sector-specific regulations as relevant.

It’s wise to review your partnership agreement regularly, especially if partners join or leave, or your business direction changes. Make sure you have adequate insurance — public liability, professional indemnity, or employer’s liability, depending on your activities.

• Set up an accounting system (cloud software is recommended)
• Arrange appropriate business insurance
• Check if you need sector licences or regulatory approval
• Register with the ICO if you handle customer data
• Review and update your partnership agreement as needed
• Keep Companies House and HMRC up to date with any changes (for LLP/LP)