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June 22, 2026
6 min read
Having the proper credentials can make a significant difference in the security industry. The SIA Approved Contractor Scheme (ACS) is one such credential that sets companies apart, ensuring they adhere to the highest standards.
The Security Industry Authority (SIA) is the organisation responsible for regulating the private security industry in the UK. The Approved Contractor Scheme (ACS) is a voluntary program that improves standards in private security services. Being an SIA Approved Contractor means a company meets high customer service, operations, and employee development criteria. This builds client trust and helps the company stand out from competitors.
Getting ACS accreditation shows that your business meets high standards, builds trust, and improves its reputation. It helps your company stand out in a competitive market, attracting more clients who value good service. Having ACS status can also give you access to contracts and opportunities that require this certification. Plus, it encourages your business to keep improving and staying efficient over time.
To apply, your organisation must:
Be based in the UK
Provide services in the private security sector
Hold a valid SIA license for relevant activities
The SAW helps you identify areas where your business complies with ACS requirements and where improvements are needed.
An independent assessor reviews your organisation to verify compliance with ACS standards.
Once approved, you must maintain the standards to keep your accreditation.
Criteria | Description |
Fit and Proper | Ensuring business owners and managers are suitable for running a security firm |
Service Delivery | Showing efficient, high-quality services to clients |
Leadership | Showing strong, ethical leadership within the organisation |
People Management | Supporting employee growth and ensuring welfare |
Corporate Social Responsibility | Adopting practices that benefit the community and environment |
Meeting ACS requirements can be challenging for businesses, as it takes a lot of effort to meet the high standards. Assessments and improvements can be costly but valuable investments in long-term success. The accreditation also needs ongoing effort and regular reviews to maintain the standards.
Most SIA-approved contractors measure their performance against the ACS standard annually, with scores verified by independent assessors. However, businesses approved through accredited passport schemes are not required to submit scores.
A company's score can give a general idea of its quality but doesn't provide the whole picture. A low overall score might still mean the company excels in certain areas, while a high score might hide weaknesses in specific aspects. That's why it's also essential to consider the company's reputation and the quality of its proposals and, if possible, review its assessment report (available with the contractor's permission).
Contractors are assessed on 78 indicators, covering staff training, financial management, and health and safety. A score above zero shows the company is exceeding minimum requirements. Companies scoring below the standard must improve or risk losing their approval. The maximum score a company can achieve is 145.
Average scores vary based on the organisation's size, measured by the number of licensable staff. Comparing scores alongside other factors can help you make a more informed choice.
Choosing an SIA Approved Contractor ensures you work with a trusted security provider that meets industry standards. Whether you're hiring for door supervision, close protection, security guarding, or CCTV operations, approved contractors deliver reliable and professional services. SIA courses are important for obtaining an SIA license and opening doors to opportunities in the security industry.
Clients feel reassured knowing that their security provider adheres to the highest industry standards, offering them confidence in the quality of service. SIA Approved Contractors are also less likely to encounter legal or regulatory issues, providing clients with added peace of mind. Furthermore, the rigorous assessments in the approval process ensure that all operations are transparent and trustworthy, reinforcing the provider's reliability and professionalism.
When hiring a private security company, you can choose between an SIA-approved contractor and a company that has not been approved. Here are some key reasons why selecting an approved contractor is a better choice.
The Approved Contractor Scheme (ACS) is a trusted mark of quality in the private security industry. Approved contractors are assessed across 78 business areas, including staff training, financial management, and health and safety policies. Choosing an approved contractor ensures you work with a business that has undergone a thorough quality assurance process.
The ACS is a voluntary scheme, meaning that companies join because they are committed to maintaining high standards. It is also a progressive standard, with continually updated requirements to raise the level of quality businesses must achieve.
In the private security industry, sub-contracting is common. Approved contractors can only sub-contract to other approved contractors unless special permission is granted. This ensures that the high quality of service you expect is consistently maintained.
The ACS encourages approved contractors to tailor their services to meet your needs, ensuring a personalised and customer-focused approach.
An SIA Approved Contractor is a security business that has voluntarily met the high standards of the Security Industry Authority (SIA). These companies are recognised for their excellence in customer service, operational performance, and employee development.
Hiring an approved contractor ensures you work with a reliable provider that meets strict industry standards. These contractors offer professional services, are less likely to face legal issues and provide tailored solutions to meet your needs.
Contractors are assessed across 78 performance indicators, including staff training, financial management, and health and safety. A positive score shows the company exceeds minimum standards, while ongoing compliance ensures quality service.
Clients choose approved contractors for their adherence to high industry standards, commitment to legal compliance, and transparent operations. These factors provide peace of mind and ensure reliable, professional service.
The SIA Approved Contractor Scheme (ACS) benchmarks excellence in the UK security industry. It helps businesses improve their services, gain client trust, and access exclusive opportunities. Choosing an approved contractor guarantees clients high-quality, customer-focused, and legally compliant services. Whether you're hiring for door supervision, close protection, security guarding, or CCTV operations, SIA-approved contractors offer top-level professionalism.
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