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 atRegister a partnership for Self Assessment (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

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+™
  • 03 Sep 2026 08:43

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

Popular Articles

Corporation Tax

Corporate interest restriction ― administrative aspects

Corporate interest restriction ― administrative aspectsThe corporate interest restriction (CIR) regime has some specific administrative rules in addition to the general administrative requirements for corporation tax returns. This guidance note does not include commentary on provisions that are

14 Jul 2020 11:19 | Produced by Tolley Read more Read more
Employment Tax

Income tax paid on behalf of employee

Income tax paid on behalf of employeeIntroductionEmployers may wish to make payments of employment income to an employee / director without the employee suffering a tax or NIC cost on that pay. In other words, the employer wants to pay an amount net of tax and NIC. In some instances, often with

14 Jul 2020 11:58 | Produced by Tolley in association with Paul Tew Read more Read more
Owner-Managed Businesses

Capital allowances on cars

Capital allowances on carsSummary of capital allowances on carsThe current capital allowance rates applicable to cars are as follows:Pool typeDescription of carRateLegislationMain rate poolNew and unused cars with CO2 emissions of 50g/km and below 18%CAA 2001, s 104AASecondhand cars with CO2

14 Jul 2020 11:08 | Produced by Tolley Read more Read more