Pillar Guide · Updated July 2026
UK Business Partnership Taxation: A Complete Guide for 2026/27
An ordinary business partnership is not itself taxed on its profits — instead, each partner is taxed individually on their share, alongside filing a joint partnership return. This guide explains how partnership profits are allocated and taxed, the paperwork involved, National Insurance for partners, and how ordinary partnerships differ from limited partnerships and LLPs.
What a Partnership Is
An ordinary business partnership is two or more people (or companies) running a business together and sharing responsibility for its profits, losses and any debts. Unlike a limited company, an ordinary partnership has no separate legal identity from its partners, and each partner is personally liable, without limit, for the debts of the business, including those run up by other partners in the ordinary course of business.
Why Partnerships Are Tax-Transparent
For tax purposes, an ordinary partnership is 'transparent': the partnership itself does not pay Income Tax or Corporation Tax on its profits. Instead, each partner is taxed as though they had earned their agreed share of the profit directly, in the same way a sole trader is taxed on the profits of their own business, and reports that share on their own Self Assessment return.
How Profits Are Shared and Taxed
The partnership agreement (or, in its absence, statutory default rules) sets out how profits and losses are divided between the partners, which does not have to be equal and can reflect capital contributed, hours worked, or seniority. Each partner then pays Income Tax at their own marginal rate — 20%, 40% or 45% in the rest of the UK, or the equivalent Scottish bands for Scottish taxpayers — on their share, in the same way as any other self-employed income.
The Partnership Tax Return
The partnership must file its own SA800 partnership tax return showing the total profit or loss for the year and how it was divided between the partners, even though the partnership itself does not pay tax on that profit. Each individual partner then also completes the partnership pages of their own personal Self Assessment return (SA100), reporting their specific share, and pays tax and Class 4 National Insurance on it accordingly.
National Insurance for Partners
Individual partners pay Class 2 National Insurance where their profits exceed the small profits threshold (Class 2 is treated as paid automatically once profits reach the threshold, protecting entitlement to contributory benefits and the State Pension) and Class 4 National Insurance on profits above the lower profits limit, calculated in the same way as for a sole trader based on each partner's individual share of the partnership profit.
VAT Registration
A partnership registers for VAT as a single entity in its own right once its taxable turnover exceeds the VAT registration threshold of £90,000, rather than each partner registering separately, and it charges and reclaims VAT under one VAT registration number covering the whole partnership business.
The Nominated Partner's Role
Partners must nominate one partner to be responsible for filing the partnership tax return and dealing with HMRC on the partnership's behalf, though this does not remove each individual partner's own responsibility for correctly reporting and paying tax on their personal share of the profit. HMRC can charge penalties against the nominated partner for late or incorrect partnership returns.
Limited Partnerships and LLPs Compared
An ordinary partnership gives every partner unlimited personal liability for the business's debts. A limited partnership allows some 'limited partners' to cap their liability to the amount they invest, provided they take no part in managing the business, while at least one 'general partner' retains unlimited liability. A Limited Liability Partnership (LLP) is a different, separately incorporated structure that gives all members limited liability similar to a company, while still generally being taxed as though it were a transparent partnership for Income Tax purposes.