What Is a SOC Audit: How It Works, Benefits, and Who Performs It

A SOC audit evaluates controls at a service organization and provides independent assurance through a formal SOC report. The appropriate report depends on whether the organization needs assurance related to financial reporting, security, availability, processing integrity, confidentiality, or privacy. A SOC examination should not be treated as automatic compliance with ISO 27001, NIST, or other frameworks because each serves a different purpose.

Key Takeaways

• A SOC audit (System and Organization Controls audit) examines controls at a service organization and results in a SOC report.
• SOC 1 focuses on controls relevant to customers' internal control over financial reporting, while SOC 2 evaluates controls against the Trust Services Criteria.
• Type I examines whether controls are suitably designed at a specified point in time, while Type II also evaluates their operating effectiveness over a defined period.
• SOC audit requirements depend on the report type, scope, applicable criteria, customer expectations, and the systems and controls being assessed.
• A SOC audit is not mandatory for every company. Organizations generally pursue one when customers, contracts, business requirements, or other applicable obligations require independent assurance.

What Is a SOC Audit?

A SOC audit is an independent examination of controls at a service organization that results in a formal SOC report. SOC stands for System and Organization Controls, and the engagement evaluates controls relevant to financial reporting or the AICPA's Trust Services Criteria.

A Security Operations Center is a cybersecurity function responsible for monitoring, detecting, investigating, and responding to threats. A SOC audit, by contrast, examines the controls maintained by a service organization.

A service organization is a company that provides services or processes systems on behalf of other organizations. Cloud providers, payment processors, payroll providers, and technology service providers can fall into this category.

The scope of a SOC audit depends on the report selected. SOC 1 addresses controls relevant to customers' internal control over financial reporting (ICFR). SOC 2 addresses controls against the Trust Services Criteria. SOC 3 also addresses the Trust Services Criteria but is designed as a general-use report with less detail than a SOC 2 report.

Customers, business partners, contractual obligations, or other business requirements may lead a service organization to pursue a SOC audit. The appropriate report should be selected based on the assurance requirement rather than simply choosing the most commonly requested option.

Who Needs a SOC Audit?

Service organizations that provide technology, cloud, data processing, financial, or other outsourced services may pursue a SOC audit when customers need independent assurance over relevant controls.

For instance, a cloud service provider may obtain a SOC 2 report to demonstrate how it manages security and other selected Trust Services Criteria. A provider whose systems affect a customer's financial reporting may instead require a SOC 1 report.

The starting point should therefore be the business requirement, the services being provided, and the controls that need to be examined.

What Is a SOC 2 Report?

A SOC 2 report evaluates controls at a service organization against the AICPA's Trust Services Criteria. These criteria cover security and, when relevant to the engagement, availability, processing integrity, confidentiality, and privacy.

The American Institute of Certified Public Accountants (AICPA) establishes the professional framework and Trust Services Criteria used for SOC engagements. The criteria address five areas:

• Security: Controls protect systems and information against unauthorized access, disclosure, damage, or disruption.
• Availability: Controls address whether systems are available for operation and use as committed or agreed.
• Processing Integrity: Controls address whether system processing is complete, valid, accurate, timely, and authorized.
• Confidentiality: Controls protect information designated as confidential.
• Privacy: Controls address the collection, use, retention, disclosure, and disposal of personal information.

Security is included in every SOC 2 examination. The remaining criteria are included when they are relevant to the organization's services and the agreed scope.

A SOC 2 report should not be presented as automatic compliance with ISO 27001, NIST, HIPAA, GDPR, or another framework or regulation. An organization may map its controls across several frameworks, but each framework or regulation has its own requirements and purpose.

For organizations developing their broader security operations, the SOC framework provides additional context on how security operations and controls fit into a wider cybersecurity program.

What Is a SOC 1 Report?

A SOC 1 report evaluates controls at a service organization that is relevant to customers' internal control over financial reporting. It is appropriate when a service provider's systems or processes can affect the financial reporting of its customers.

SOC 1 has a narrower financial-reporting focus than SOC 2. Its purpose is to assure controls that are relevant to how customers prepare and report their financial information.

Consider a payroll or transaction-processing provider. If its services can affect the financial records of its customers, those customers may need assurance about the provider's relevant controls. A SOC 1 report can address that requirement.

SOC 1 reports can be issued as Type I or Type II:

• SOC 1 Type I: Evaluates whether relevant controls are suitably designed as of a specified date.
• SOC 1 Type II: Evaluates the design of controls and their operating effectiveness over a specified period.

The right report ultimately depends on the services provided and the assurance customers require.

SOC 1 vs SOC 2

SOC 1 and SOC 2 both examine controls at service organizations, but they answer different assurance questions. SOC 1 focuses on controls relevant to financial reporting, whereas SOC 2 focuses on the Trust Services Criteria.

Some organizations need both reports. A service provider may, for example, have financial-reporting implications for one group of customers while other customers need broader assurance over security and related controls.

What Is the SOC Audit Process?

The SOC audit process involves defining the scope, selecting the appropriate report, assessing control readiness, engaging an independent service auditor, testing controls, addressing findings, and completing the final SOC report.

1. Determine the Need for a SOC Audit

First, establish why the organization needs a SOC report. Customer requirements, contractual obligations, financial reporting considerations, security assurance needs, and business objectives can all influence the decision.

The scope must also be defined at this stage. This includes identifying the relevant systems, services, locations, processes, and controls that will be examined.

2. Select the Type of SOC Report

The report should match the organization's assurance objective:

• SOC 1: Controls relevant to internal control over financial reporting.
• SOC 2: Controls evaluated against the Trust Services Criteria.
• SOC 3: A general-use report addressing the Trust Services Criteria with less detail than a SOC 2 report.

The organization must then decide whether a Type I or Type II examination is appropriate.

3. Conduct a Readiness Assessment

A readiness assessment identifies gaps before the formal examination begins. It reviews policies, procedures, control design, evidence, ownership, and implementation against the selected scope.

This stage can expose issues such as incomplete access reviews, inconsistent change-management records, missing security documentation, or insufficient evidence. Addressing these gaps before the examination can reduce avoidable findings.

4. Engage an External Auditor

A SOC examination is performed by an independent service auditor. CPA firms conduct SOC examinations under the applicable professional standards and reporting requirements.

At this stage, the organization and auditor establish the scope, criteria, examination period, responsibilities, evidence requirements, and reporting expectations.

5. Perform SOC Testing and Audit Execution

The auditor evaluates the controls within scope and examines the evidence supporting them. Depending on the engagement, testing can cover access management, change management, risk management, incident response, monitoring, vendor management, data protection, and other relevant controls.

For a Type II report, the examination goes further by assessing whether those controls operated effectively during the defined examination period.

6. Address Findings and Maintain Compliance

Identified control deficiencies should be addressed, while supporting evidence needs to remain available for future examinations. SOC readiness is therefore not something that ends when the report is issued.

Maintaining clear control ownership, collecting evidence consistently, monitoring controls, and documenting remediation throughout the year can make subsequent examinations more efficient.

If your organization is preparing for an external security or compliance assessment, a readiness or gap assessment can identify control weaknesses before they become audit findings. Eventus Security can help organizations assess their cybersecurity controls and prioritize security gaps.

What Is the Difference Between SOC 2 Type I and Type II?

SOC 2 Type I evaluates whether controls are suitably designed as of a specified date, while SOC 2 Type II evaluates control design and operating effectiveness over a defined examination period. Type II therefore requires evidence that controls operated effectively during that period.

The same Type I and Type II distinction applies to SOC 1 engagements.

A Type I report provides an assessment of control design at a specified date. A Type II report adds evidence about how those controls operated throughout the examination period.

Type II should not be described as continuous monitoring. It is an examination of operating effectiveness over a defined period.

Who Performs a SOC Audit?

A SOC audit is performed by an independent service auditor with the professional qualifications and expertise required for the engagement. CPA firms conduct SOC examinations under the applicable professional standards and reporting requirements.

What Qualifications Are Required for SOC Auditors?

A service auditor should have relevant experience in attestation engagements, service organization controls, audit methodology, and the subject matter covered by the engagement.

SOC 1 examinations require knowledge of controls relevant to financial reporting. SOC 2 examinations require expertise in the Trust Services Criteria and control testing.

Cybersecurity certifications can add technical expertise, but holding a cybersecurity certification alone does not make an organization the issuer of a SOC report.

What Is the Role of a SOC Auditor?

When supporting organizations with SOC audit readiness, at Eventus Security, our SOC auditor helps assess controls within the defined scope, review supporting evidence, identify control gaps, and prepare organizations for the formal examination. The assessment goes beyond reviewing whether policies exist; it considers whether relevant controls are suitably designed, implemented, and supported by appropriate evidence. For Type II engagements, organizations must also demonstrate that these controls operate effectively throughout the defined examination period. 

The examination goes beyond checking whether policies exist. It considers whether relevant controls are suitably designed and, for Type II engagements, whether they operated effectively during the defined examination period.

What Are the Benefits of a SOC Audit?

A SOC audit provides independent assurance over controls within a defined scope. It can help service organizations demonstrate control effectiveness to customers, support third-party risk assessments, identify control gaps, and provide structured evidence about their control environment.

Regulatory and Compliance Support

A SOC report can support broader compliance and assurance programs when customers or contractual requirements call for independent evidence. It does not, however, replace every regulatory requirement or certification.

Trust and Credibility

An independent SOC report gives customers structured information about controls relevant to the services they use. This can make third-party evaluations more efficient by giving customers a standardized source of control information.

Risk Management

The examination can reveal weaknesses in internal controls, documentation, evidence collection, access management, change management, and other controls within scope.

Client Assurance

SOC reports can form part of customer due diligence and third-party risk assessments. They give customers a consistent way to understand the service organization's control environment.

Operational Improvement

Preparing for an examination often requires clearer control ownership, more consistent evidence collection, better monitoring, and documented remediation. Those practices can also improve readiness for future assessments.

How Much Does a SOC Audit Cost?

SOC audit cost depends on the report type, scope, organization size, system complexity, number of controls, examination period, readiness requirements, and auditor fees. Type II engagements generally require more extensive testing than Type I engagements because operating effectiveness is evaluated over a defined period.

There is no single SOC audit cost that applies to every organization.

The final cost can be influenced by:

• SOC 1, SOC 2, or SOC 3 scope
• Type I or Type II examination
• Number of systems and services in scope
• Number and complexity of controls
• Number of locations or business processes involved
• Readiness and remediation requirements
• Availability and quality of audit evidence
• Auditor and professional service fees
• Additional technical assessments required by customers or contracts

Organizations should therefore request a scope-based quotation rather than rely on a generic SOC audit cost estimate.

Is a SOC Audit Mandatory for All Companies?

No. A SOC audit is not mandatory for every company. Organizations generally pursue a SOC examination when customers, contracts, business requirements, or other applicable obligations require independent assurance over relevant controls.

A service organization may be asked to provide a SOC report during enterprise procurement or a third-party risk assessment. The specific requirement can vary by customer: one may request SOC 2 because it needs assurance over security and other Trust Services Criteria, while another may require SOC 1 because the service affects financial reporting.

The requirement is therefore context-dependent rather than universal.

SOC Audit in India

SOC audits are not a blanket statutory requirement for every company operating in India. Organizations may nevertheless pursue SOC 1, SOC 2, or SOC 3 reports because of customer requirements, global contracts, sector expectations, or internal assurance objectives.

SOC audits should also be distinguished from CERT-In cybersecurity audits. CERT-In's Comprehensive Cyber Security Audit Policy Guidelines, issued on July 25, 2025, provide a framework for cybersecurity audits and outline responsibilities, methodologies, audit processes, and reporting expectations for auditing organizations and auditee organizations.

A CERT-In cybersecurity audit and a SOC examination are therefore different forms of assurance and should not be presented as interchangeable.

For Indian organizations dealing with multiple security and regulatory requirements, keeping the scopes separate helps clarify what each assessment actually demonstrates. Eventus Security's CERT-In compliance and SOC audit guidance provides additional context on CERT-In requirements and SOC-related security operations.

How Can Eventus Security Help With SOC and Cybersecurity Assessments?

Eventus Security provides cybersecurity assessment and audit-related services that can help organizations identify security gaps, evaluate controls, and prepare for applicable security and compliance requirements. Eventus Security is CERT-In empanelled for information security auditing services.

Eventus supports organizations through activities such as vulnerability assessment, penetration testing, security auditing, incident readiness and response, and related cybersecurity assessments. These services can help identify weaknesses before an external assessment.

For organizations preparing for a SOC engagement, these technical assessments can complement—not replace—the formal SOC examination performed by the appropriate independent service auditor.

Organizations preparing for a CERT-In-aligned assessment can also refer to Eventus' CERT-In VAPT guidelines for information on assessment scope, methodology, evidence, reporting, and remediation.

FAQs

What Does SOC Audit Stand For?

SOC audit stands for System and Organization Controls audit. It is an independent examination of controls at a service organization that results in a SOC report. SOC 1, SOC 2, and SOC 3 address different assurance objectives.

What Is the Difference Between SOC 1 and SOC 2?

SOC 1 focuses on controls relevant to internal control over financial reporting, while SOC 2 evaluates controls against the Trust Services Criteria, including security and, when relevant, availability, processing integrity, confidentiality, and privacy.

What Is the Difference Between SOC 2 Type I and Type II?

SOC 2 Type I evaluates whether controls are suitably designed at a specified point in time. SOC 2 Type II evaluates control design and operating effectiveness over a defined examination period.

Is SOC 2 Mandatory?

SOC 2 is not universally mandatory for all companies. A service organization may pursue SOC 2 because customers, contracts, procurement requirements, or business objectives require independent assurance over its controls.

How Much Does a SOC Audit Cost?

SOC audit cost depends on the report type, scope, organization size, control complexity, examination period, auditor fees, and readiness requirements. A scope-based quotation is more reliable than a standard industry-wide price.

Add these two brand-specific FAQs:

Can Eventus Security Help With SOC Audit Preparation?

Eventus Security can support organizations with cybersecurity assessments, control-gap identification, vulnerability assessment, penetration testing, and related security activities that can help strengthen readiness before a formal SOC examination.

Does Eventus Security Perform SOC Audits?

Eventus Security supports organizations with cybersecurity assessment and audit-readiness activities. The formal SOC examination and SOC report are issued by the appropriate independent service auditor; Eventus' assessments can complement that process by identifying security and control gaps beforehand.