SOC 2, which stands for System and Organization Controls 2, is an independent assurance reporting framework developed by the American Institute of Certified Public Accountants (AICPA). It is used to evaluate and report on controls at service organisations that are relevant to the security, availability, processing integrity, confidentiality or privacy of information and systems. SOC 2 reports provide customers and other relevant stakeholders with information about how a service provider manages selected security and operational risks.
SOC 2 is particularly relevant to cloud service providers, Software as a Service (SaaS) businesses, data processors, managed technology providers and organisations delivering services that involve customer information or critical systems. An independent licensed CPA firm examines the organisation’s system description and applicable controls against defined Trust Services Criteria. Depending on the report type, the examination may evaluate the design of controls at a particular date or their design and operating effectiveness over a specified period.
For UK businesses, particularly financial services firms, legal practices and organisations outsourcing technology services, SOC 2 reports can provide useful evidence during supplier due diligence and cybersecurity assurance activities. Although SOC 2 originates from the United States, reports are frequently requested by international customers and organisations evaluating cloud or technology providers. However, SOC 2 is an attestation reporting framework rather than a general cybersecurity certification, and obtaining a report does not automatically establish compliance with UK GDPR, FCA requirements or ISO 27001.
Why SOC 2 Is Important for Businesses
Modern organisations increasingly rely on external technology providers to store information, operate applications and support essential business processes.
This creates a need for reliable information about how suppliers protect systems, manage access permissions, respond to incidents and maintain relevant security controls.
Supplier questionnaires and marketing statements can provide some information, but they may not offer sufficient independent assurance about the provider’s actual control environment.
SOC 2 addresses this challenge through a structured examination performed by an independent auditor.
Key Benefits of SOC 2 Include:
- Independent Security Assurance: Provides an auditor’s opinion on defined controls against recognised criteria.
- Greater Supplier Transparency: Helps customers understand relevant security arrangements and operational responsibilities.
- Improved Cybersecurity Governance: Encourages service providers to document and maintain appropriate controls.
- Stronger Customer Due Diligence: Supports assessments of cloud, SaaS and outsourced technology providers.
- Better Control Accountability: Requires clear descriptions of systems, processes and relevant responsibilities.
- Evidence of Operating Effectiveness: Type 2 reports evaluate how specified controls operated during the examination period.
- More Efficient Security Reviews: Can reduce duplication when customers request information about similar security controls.
- Greater Commercial Confidence: Helps service providers respond to security expectations during procurement and contract negotiations.
For example, a UK financial technology company may use an external cloud platform to process customer information.
Before entering into a contract, the company may request the provider’s SOC 2 report to understand whether relevant access controls, monitoring arrangements and operational safeguards have been independently examined.
The report can help identify which controls were tested, whether exceptions were identified and which responsibilities remain with the customer.
SOC 2 provides valuable assurance information, but it should not be treated as a guarantee that a supplier will never experience a security incident.
The report’s usefulness depends on its scope, examination period, findings and relevance to the services being purchased.
How SOC 2 Works
SOC 2 examinations evaluate a service organisation’s system and related controls against relevant Trust Services Criteria established by the AICPA.
The organisation identifies the services and systems to be included, determines which criteria apply and documents the controls used to meet those criteria.
An independent CPA firm then performs the examination and issues a report containing its opinion and supporting information.
A Typical SOC 2 Process Includes:
- Define the Examination Scope: Identify the services, systems, infrastructure, personnel and processes included in the assessment.
- Select Relevant Trust Services Criteria: Determine which criteria apply to the organisation and the services being examined.
- Document the Control Environment: Describe relevant policies, procedures, technical safeguards and operational responsibilities.
- Conduct a Readiness Assessment: Identify potential gaps before the formal examination, where appropriate.
- Implement Necessary Improvements: Address weaknesses in security controls, documentation and supporting processes.
- Engage an Independent CPA Firm: Appoint an appropriately qualified auditor to perform the SOC 2 examination.
- Provide Supporting Evidence: Submit relevant policies, configurations, records and control testing information.
- Complete the Examination: Allow the auditor to evaluate the controls according to the selected report type.
- Receive the SOC 2 Report: Review the auditor’s opinion, findings and relevant control information.
- Maintain Ongoing Controls: Continue operating and reviewing security arrangements after the examination.
The specific procedures depend on whether the organisation obtains a Type 1 or Type 2 report.
SOC 2 Type 1
A SOC 2 Type 1 report evaluates the description of the service organisation’s system and the suitability of the design of relevant controls as of a specified date.
It provides assurance concerning the control design at that point in time.
However, it does not provide the same evidence of sustained operating effectiveness as a Type 2 examination.
SOC 2 Type 2
A SOC 2 Type 2 report evaluates the system description, the suitability of control design and the operating effectiveness of relevant controls over a defined period.
The auditor examines evidence showing how controls operated during the examination period.
This provides customers with additional information about whether the organisation consistently performed the relevant security and operational activities.
SOC 2 Type 1 vs Type 2
| Feature | SOC 2 Type 1 | SOC 2 Type 2 |
| Assessment Focus | Control design at a specified date | Control design and operating effectiveness over a period |
| Time Coverage | Point in time | Defined examination period |
| Operating Effectiveness Testing | Not included as a period-based opinion | Included |
| Typical Purpose | Assess whether relevant controls are suitably designed | Assess whether relevant controls operated effectively |
| Evidence | System description and control design evidence | System description, control design and operational evidence |
| Customer Assurance | Useful initial assurance | More detailed assurance concerning control operation |
Neither report type guarantees complete protection from cyber incidents.
Businesses should review the actual audit opinion, scope and findings rather than assuming that one report type automatically addresses every security concern.
The Five SOC 2 Trust Services Criteria
SOC 2 examinations use the AICPA Trust Services Criteria to evaluate controls relevant to defined assurance objectives.
There are five Trust Services Categories: Security, Availability, Processing Integrity, Confidentiality and Privacy.
Security is the foundation of a SOC 2 examination, while the other categories are included when relevant to the service organisation’s commitments and system requirements.
Security
The Security category concerns protecting information and systems against unauthorised access, disclosure or damage that could compromise their availability, integrity, confidentiality or privacy.
Relevant controls may include:
- Identity and access management
- Multi-Factor Authentication
- Network and endpoint security
- Vulnerability management
- Security monitoring
- Incident response
- Risk assessment and governance
Security controls help establish the organisation’s ability to protect its systems against relevant threats.
Availability
Availability concerns whether systems are available for operation and use in accordance with relevant commitments and system requirements.
Assessment areas may include infrastructure monitoring, capacity management, incident response and recovery arrangements.
Availability does not automatically mean that a service is continuously accessible without interruption.
Processing Integrity
Processing Integrity concerns whether system processing is complete, valid, accurate, timely and authorised in accordance with relevant objectives.
This category is particularly important for services where incorrect processing could affect transactions, calculations or business records.
Confidentiality
Confidentiality concerns protecting information designated as confidential from inappropriate access, use or disclosure.
Relevant controls may include access restrictions, encryption, secure disposal and information handling procedures.
Privacy
Privacy concerns the collection, use, retention, disclosure and disposal of personal information in accordance with relevant privacy commitments and criteria.
The Privacy category is distinct from Confidentiality because it addresses broader information processing practices and commitments concerning personal data.
SOC 2 Trust Services Criteria Compared
| Category | Primary Focus | Example of Relevant Controls |
| Security | Protection against unauthorised access and security threats | MFA, vulnerability management, security monitoring |
| Availability | Reliable operation and accessibility of systems | Infrastructure monitoring, continuity and recovery planning |
| Processing Integrity | Complete, accurate, valid and authorised processing | Transaction validation, processing controls |
| Confidentiality | Protection of information classified as confidential | Encryption, access restrictions, information handling |
| Privacy | Responsible processing of personal information | Privacy governance, retention and disclosure controls |
Not every SOC 2 report covers all five categories.
A business reviewing a supplier’s report should confirm which Trust Services Criteria were included and whether they are relevant to the services and risks being assessed.
For example, a report addressing Security alone may provide useful information about protection against unauthorised access but may not offer the same assurance concerning Availability or Processing Integrity.
This distinction is particularly important when a service supports critical business operations or processes sensitive information.
Common SOC 2 Risks and Challenges
SOC 2 reports can provide valuable assurance, but their findings may be misunderstood when businesses focus only on whether a supplier has completed an examination.
One common mistake is referring to SOC 2 as a certification. Unlike ISO 27001 certification, SOC 2 results in an independent attestation report containing an auditor’s opinion.
Another challenge involves assuming that the report covers the supplier’s entire organisation or every service it provides.
Common SOC 2 Challenges Include:
- Misunderstanding Report Scope: Customers assume all systems and services were examined when only selected components were included.
- Confusing Type 1 and Type 2: A point-in-time report is treated as evidence of controls operating effectively over an extended period.
- Ignoring Audit Exceptions: Significant findings or testing exceptions are overlooked.
- Outdated Examination Periods: A report may not reflect recent changes to the supplier’s technology environment.
- Unclear Customer Responsibilities: Customers overlook controls they must implement themselves.
- Limited Subservice Organisation Visibility: Important underlying providers may be excluded from the examined control environment.
- Assuming Complete Regulatory Compliance: SOC 2 is incorrectly treated as proof of compliance with all applicable laws.
- Insufficient Review of Auditor Opinion: The conclusion is accepted without considering qualifications or other relevant reporting details.
- Overreliance on a Single Report: Customers fail to assess risks outside the SOC 2 examination scope.
- Weak Ongoing Supplier Monitoring: Organisations review the report during procurement but do not reassess the provider when circumstances change.
For example, a cloud service provider may present a SOC 2 Type 2 report covering its primary hosting platform.
However, the organisation purchasing the service may also rely on a separate application or support function that falls outside the examined scope.
The customer should understand these boundaries before relying on the report as part of its supplier assessment.
Another important consideration involves Complementary User Entity Controls (CUECs).
These are controls that the service organisation assumes its customers will implement for the overall control objectives to be achieved.
For example, a cloud provider may maintain secure infrastructure while expecting customers to configure appropriate authentication and user permissions.
If customers fail to implement relevant CUECs, the provider’s SOC 2 report does not compensate for those missing safeguards.
SOC 2 reports may also describe complementary controls at subservice organisations, making it important to understand which underlying services and responsibilities are included or excluded.
A SOC 2 report should therefore be reviewed as a detailed assurance document rather than a simple security approval badge.
Best Practices for SOC 2 Readiness and Report Evaluation
Effective SOC 2 management involves two related responsibilities.
Service providers need to maintain controls and evidence that support an independent examination. Customers and business partners need to interpret the resulting reports correctly when evaluating supplier risk.
Both activities benefit from clear documentation, appropriate control ownership and regular review.
Best Practices for SOC 2 Readiness Include:
- Define the Examination Scope: Identify the systems, services and operational processes relevant to customer commitments.
- Select Appropriate Trust Services Criteria: Include categories that reflect the organisation’s services and assurance requirements.
- Establish Security Control Ownership: Assign responsibility for implementing, reviewing and maintaining relevant safeguards.
- Maintain Accurate System Documentation: Record important infrastructure, applications, processes and service dependencies.
- Strengthen Identity Security: Apply appropriate authentication, privileged access restrictions and account management controls.
- Document Security Operations: Maintain evidence of vulnerability management, monitoring, incident response and relevant changes.
- Evaluate Supplier Dependencies: Understand controls operated by important subservice organisations.
- Test Control Effectiveness: Confirm that relevant activities are operating as intended rather than existing only in policy documents.
- Track Remediation Actions: Assign ownership and deadlines to identified weaknesses.
- Maintain Evidence Throughout the Year: Keep records of control operation rather than gathering information only before an examination.
- Review Audit Findings: Address exceptions and weaknesses identified during the assessment.
- Reassess Controls After Significant Changes: Update documentation and security arrangements as technology and business requirements evolve.
For organisations evaluating a supplier’s SOC 2 report, several additional checks are important.
The customer should confirm the report type, examination period, covered services, applicable Trust Services Criteria, auditor’s opinion and relevant testing exceptions.
It should also review identified customer responsibilities and any important subservice organisation arrangements.
For example, a UK financial services company assessing a SaaS provider could use the SOC 2 report alongside contractual security requirements, supplier risk assessments and business continuity information.
If the service processes personal data, the company must separately evaluate applicable UK GDPR obligations and the adequacy of relevant contractual safeguards.
A SOC 2 report can support this process but does not replace it.
For London SMEs and regulated firms, SOC 2 is particularly useful as part of wider third-party security assurance. Its value increases when findings are connected to practical risk management decisions rather than simply recorded as evidence that the supplier has undergone an audit.
Conclusion: Why SOC 2 Matters
SOC 2 provides an independent assurance reporting framework for evaluating controls relevant to the security, availability, processing integrity, confidentiality and privacy of information and systems. By examining a service organisation’s control environment, it gives customers and business partners more structured information about how selected technology risks are managed.
For London SMEs and regulated firms, SOC 2 reports can support supplier due diligence, cybersecurity assurance and stronger oversight of outsourced technology services. However, the usefulness of a report depends on its type, scope, examination period, auditor’s opinion and identified control responsibilities. A SOC 2 examination does not guarantee complete security or automatically establish compliance with UK regulatory requirements.
A well-understood SOC 2 report helps businesses make more informed decisions about the suppliers they trust with important systems and information. When combined with appropriate contractual safeguards, ongoing monitoring and risk-based assessment, it becomes a valuable source of evidence within a broader technology governance and security assurance programme.