Form AR21: Annual return for trade unions

Blank form AR21 with guidance notes


FORM AR21: Annual Return for Trade Unions

This file is in an OpenDocument format


A Form AR21 is used by trade unions to make an annual return to the Certification Officer.

Additional reporting requirements resulting from the Trade Union Act 2016 which came into effect from 1 March 2017 (for reporting periods that begin on the day after 1 March 2017):

Unions whose reporting periods begin on the day after 1 March 2017 must now report on ballots held in respect of industrial action by the trade union during the reporting year and details of any industrial action taken during that period. For those unions with political funds there is a requirement for additional information for political fund expenditure.

All trade unions must complete the new pages 18-21 on ballots held and industrial action taken. Guidance on completing this section is at notes 74-81 of the guidance notes.

Those trade unions who hold Political Funds must complete pages 9 and 9i – 9vii. Guidance on how to complete this section is at notes 24-33 of the guidance notes.

AR21s not completed with this additional information will not comply with the duties on trade unions as provided in the Trade Union and Labour Relations (Consolidation) Act 1992 (as amended by the Trade Union Act 2016).

Published 30 October 2014
Last updated 5 December 2018 + show all updates
  1. We have updated the AR21 form. Please ensure that you use this version when reporting to the Certification Office.
  2. Note 81 about industrial action has been expanded.
  3. Updates to information on industrial action ballots and minor changes.
  4. The AR21 form with Membership Audit Certificate has been revised.
  5. First published.