Collection

How to become an SIA approved contractor

How to get your company approved by the Security Industry Authority.

• From: Security Industry Authority
• Published: 22 April 2021
• Last updated: 19 January 2026 — See all updates

What you need to know

What you need to know if you are thinking of applying to be an SIA approved contractor.

• Learn about our Approved Contractor Scheme
  • 10 August 2020
  • Guidance
• Find out why you should apply for ACS approval
  • 16 October 2020
  • Guidance
• Apply for ACS approval
  • 19 January 2026
  • Guidance
• ACS approval: additional conditions
  • 6 January 2026
  • Guidance
• If we refuse your application for ACS approval
  • 14 October 2020
  • Guidance
• Keep your ACS approval
  • 19 January 2026
  • Guidance

Documents

• SIA: Get Approved
  • 6 January 2026
  • Guidance
• ACS self-assessment workbook
  • 19 January 2026
  • Form
• SIA Approved Contractor Scheme application forms
  • 19 January 2026
  • Form
• SIA Approved Contractor Scheme payment slip
  • 19 January 2026
  • Form
• Maintaining your ACS approval
  • 19 January 2026
  • Guidance

Published 22 April 2021

Last updated 19 January 2026 + show all updates

1. 19 January 2026

   Updated the 'Documents' section to include links to: the 'ACS self-assessment workbook' page; the 'SIA Approved Contractor Scheme application forms' page; 'SIA Approved Contractor Scheme payment slip' page.

2. 6 January 2026

   Added links to the new 'SIA: Get Approved' and 'ACS approval: additional conditions' pages.

3. 22 April 2021

   First published.