What Is SIA ACS and How Do You Get Approved?
A complete guide to the SIA Approved Contractor Scheme for UK security companies. Learn what ACS is, why it matters, how to prepare for your audit, and how digital tools help you meet the standard.
By Michael Bryce · 11 March 2026 · Updated 25 April 2026 · 3 min read
Understanding the Approved Contractor Scheme
For ACS compliance, this is important. The SIA Approved Contractor Scheme (ACS) is a voluntary accreditation programme run by the Security Industry Authority. It sets a benchmark for quality and professionalism in the UK private security industry. Companies that achieve ACS status have demonstrated that they meet defined standards across staffing, training, management, and service delivery.
While ACS isn’t legally required, it’s become a de facto requirement for winning larger contracts. Many corporate clients, local authorities, and public sector bodies will only work with ACS-approved contractors.
Why ACS Matters for Growing Companies
If you’re running a security company with 30 to 50 guards and you’re looking to grow, ACS accreditation opens doors that are otherwise firmly shut:
- Contract eligibility: Many tender documents require ACS status as a minimum qualification
- Client confidence: The ACS badge signals professionalism and accountability
- Competitive edge: In a crowded market, accreditation differentiates you from companies that can’t or won’t meet the standard
- Staff retention: Guards prefer working for reputable, accredited employers
- Insurance benefits: Some insurers offer better rates to ACS-approved companies
What the ACS Audit Covers
The ACS assessment is scored across several areas. You need to achieve a minimum score in each to gain approval. The key areas include:
- Staffing and recruitment: Are your guards properly licensed? Do you verify SIA licences? What’s your vetting process?
- Training and development: Do you provide ongoing training beyond the SIA minimum? Can you evidence it?
- Service delivery: How do you manage deployments, incidents, and client relationships?
- Management and supervision: What oversight systems are in place? How do you monitor guard performance?
- Compliance and documentation: Can you produce records, reports, and evidence of your processes on demand?
How to Prepare for ACS Accreditation
Preparation is everything. Companies that fail ACS audits usually do so because they can’t evidence what they’re already doing. Here’s how to get ready:
1. Document Everything
If it isn’t written down, it didn’t happen. Create standard operating procedures for recruitment, training, deployment, incident management, and client reporting. Keep records of every training session, every licence check, every supervision visit.
2. Centralise Your Records
Auditors want to see your systems, not your filing cabinets. Having a digital system where you can pull up any guard’s licence status, training history, and deployment record in seconds makes a powerful impression.
3. Standardise Your Reporting
Consistent, professional incident reports demonstrate operational maturity. Use standardised templates or digital tools that ensure every report contains the required information.
4. Implement Proper Supervision
Show that you have systems for monitoring guard welfare, performance, and compliance. Check call systems, GPS tracking, and patrol verification all demonstrate active management.
How Digital Tools Help
Guard management platforms like TacDesk are designed with ACS requirements in mind. Features like SIA licence tracking with automatic expiry alerts, digital incident reporting with timestamps and GPS data, NFC checkpoint patrols, check call systems, and Digital Occurrence Books create the evidence trail that auditors want to see.
When an auditor asks “how do you track licence expiry?” and you can show them a live dashboard with every guard’s status, renewal dates, and alert history — that’s the kind of answer that scores well.
Preparing for ACS? Explore TacDesk’s demo to see how digital tools support every area of the ACS assessment.
Related Articles
- → The 7 ACS Compliance Criteria Explained
- → How to Prepare for an ACS Audit: A Practical Checklist
- → How to Stay SIA Compliant: A Complete Guide for UK Security Companies
- → Right to Work Checks for Security Guards: The UK Security Company Guide
- → Best Guard Management Software UK 2026: An Honest Comparison
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Michael Bryce
Founder of TacDesk. Writes about SIA compliance, operations, and running a UK security company — from someone who actually works the shifts.
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