Self assessment tax returns ― partnerships and partners

Copyright © 2026 LexisNexis
Produced by a Tolley Owner-Managed Businesses expert
Owner-Managed Businesses
Guidance

Self assessment tax returns ― partnerships and partners

Copyright © 2026 LexisNexis
Produced by a Tolley Owner-Managed Businesses expert
Owner-Managed Businesses
Guidance
imgtext

Self assessment tax returns must be filed by the partnership (a partnership tax return, SA800) and by each individual partner (SA100 with the partnership supplementary pages, SA104S or SA104F).

Corporate partners include their share of the partnership income in their company tax return (see the Corporation tax self assessment (CTSA) returns guidance note).

Registering partnerships

Limited liability partnerships (LLP) and limited partnerships (LP) are automatically registered for self assessment by Companies House when they are formed. However, all other partnerships will need to register with HMRC directly. This should be done within six months of the end of the tax year of commencement.

This can be done online (or by using postal forms if the online service cannot be used). The form that needs to be submitted is form SA400.

In addition, the partners will also need to register for self assessment (and, if appropriate, Class 2 National Insurance Contributions (NICs)). If the partner is an individual then form SA401 should be used and if they are not an individual (eg they are

Continue reading the full document
To gain access to additional expert tax guidance, workflow tools, generative tax AI, and tax research, register for a free trial of Tolley+™
TAKE A FREE TRIAL NOW
Powered by Tolley+™
  • 23 Mar 2025 22:45

Home/ Tolley Tax Guidance/ Owner-Managed Businesses / Administration

Popular Articles

Personal Tax

Foreign tax relief

Foreign tax reliefIncome and gains may be taxable in more than one country. The UK has three ways of ensuring that the individual does not bear a double burden:1)treaty tax relief may reduce or eliminate the double tax2)if there is no treaty, the individual can claim ‘unilateral’ relief by deducting

14 Jul 2020 11:44 | Produced by Tolley Read more Read more
tag-icon Tax Returns
Employment Tax

Long service awards

Long service awardsEmployee recognition by an employer can be an important motivational tool, as well as having a positive effect on retention. Most employer awards made to an employee are treated as taxable earnings under ITEPA 2003, s 62 or as a benefit under ITEPA 2003, s 201 because they are

14 Jul 2020 12:11 | Produced by Tolley Read more Read more
Personal Tax

Gilts

Gilts‘Gilts’ are securities that are also known by a number of different names (eg gilt-edged securities, Government securities or treasury stock).The Government sells gilts to fund the deficit between public spending and tax receipts. Normally, the Government pays interest to the holder of the gilt

14 Jul 2020 11:48 | Produced by Tolley Read more Read more