LLPs are incorporated by two or more persons (this includes individuals, companies or firms), associated for carrying on a business with a view to profit. Form LL IN01 needs to be completed and sent to Companies House. Part 6 (Authentication) of Form LL IN01 must be signed by a member or solicitor acting for the LLP to confirm compliance with the requirements of the Limited Liability Partnership Act 2000. Details of current incorporation fees are available on the Companies House website.

Form LL IN01 requires the following information:

• the LLP's name. The ECCTA has introduced greater controls in respect of LLP names, increasing the range of circumstances in which names can be prohibited; 
• where the registered office of the LLP is to be situated (i.e. England and Wales, Wales, Scotland or Northern Ireland); 
• the registered office address (which must be appropriate); 
• the LLP's registered email address (which must be appropriate);
• that 2 or more persons have subscribed their name to the incorporation document for carrying on lawful business with a view to profit;
• whether the LLP is to have specified members as designated members or whether all members are to be designated members; 
• details of each proposed member, including whether that member is to be a designated member. Note that a person may not become a member of an LLP if they are disqualified under director disqualification legislation; 
• confirmation that each proposed member of the LLP has already verified their identity under section 1110A of the Companies Act 2006;
• details of people with significant control (PSCs), or other legally required statements such as a statement that the LLP does not have any PSCs. Note that each person appointed as a PSC can confirm in form LL IN01 that they have verified their identity in accordance with the Companies Act 2006, however unlike for members, PSCs are not required to verify their identity in advance. For new PSCs from 18 November 2025, the PSC has 14 days from the date of their registration with Companies House to provide their statement and personal code; and
• a statement of compliance.