What is SOC 1?
SOC 1 is not an ISO management-system standard and there is no accredited certification body behind it. It's an attestation report, issued under the AICPA's attestation standards by an independent, licensed CPA firm, on a service organization's controls that are relevant to its clients' internal control over financial reporting (ICFR).
At its core, a SOC 1 report is not a pass/fail certificate. It's the CPA firm's written opinion on whether management's description of its system is fairly presented and whether the related controls are suitably designed (Type I) and, if tested over a period, operating effectively (Type II).
Simple Analogy: Think of a SOC 1 report as a reference letter written by an independent CPA firm and addressed to your customers' own auditors, confirming that the controls relevant to their financial reporting are properly designed and, for a Type II report, actually working as described over a review period, so those customer auditors don't have to test your controls themselves.
Historical Context: Reports on service organization controls trace back to SAS 70, issued by the AICPA in 1992. SSAE 16, effective in 2011, replaced SAS 70 and introduced the "SOC 1" name and the Type I/Type II structure still used today. SSAE 18, effective in 2017, is the current attestation standard governing SOC 1 engagements.
Why Is SOC 1 Important?
When a company outsources a process that touches its financial statements, payroll processing, loan servicing, claims administration, fund administration, or the data centers and SaaS platforms underneath them, that company's external auditor still has to obtain evidence about the controls at the service organization. Auditing standards such as AU-C 402 in the U.S. (and ISAE 3402 internationally) require it. A SOC 1 report is the standard way service organizations provide that evidence, so their customers' auditors don't need to visit and test controls on site.
Without a SOC 1 report, a service organization providing finance-adjacent services can face repeated, disruptive audit visits from multiple customers' auditors each year, or lose deals outright when prospective customers' auditors won't sign off without one. A single SOC 1 Type II report, refreshed annually, lets one audit stand in for many.
Key Insight
For payroll processors, fund administrators, and SaaS providers whose platforms touch customers' financial reporting, a SOC 1 Type II report is often the fastest way to satisfy nearly every customer's audit evidence request without a site visit.
What Is SOC 1?
SOC 1 (System and Organization Controls 1) is an AICPA attestation report on the internal controls at a service organization that are relevant to its clients’ internal control over financial reporting (ICFR). It is essential for payroll processors, data centres, and software that affect customers’ financial statements.
SOC 1 vs SOC 2
SOC 1 covers controls relevant to financial reporting (ICFR); SOC 2 covers security and the Trust Services Criteria. Choose SOC 1 if your service affects clients’ financials, SOC 2 if the concern is data security.
SOC 1 Type I vs Type II
Type I assesses control design at a point in time; Type II tests operating effectiveness over a period. Auditors and customers typically expect Type II. Readiness usually takes 3-6 months; the audit is performed by a CPA firm. Request a free quote.
Key Principles: The Five Components of Internal Control
SOC 1 examinations evaluate controls relevant to ICFR against the widely used COSO Internal Control Integrated Framework, which organizes internal control into five components:
Control Environment
The tone at the top, integrity, ethical values, and organizational structure that underpin all other controls.
Risk Assessment
How the organization identifies and analyzes risks to achieving accurate financial reporting, including risk from change.
Control Activities
The policies and procedures, such as approvals, reconciliations, and system access restrictions, that help ensure management's directives are carried out.
Information and Communication
How relevant, quality information is identified, captured, and communicated in a form and timeframe that lets people carry out their control responsibilities.
Monitoring Activities
Ongoing evaluations to check that each of the other four components is present and functioning, with deficiencies reported and corrected.
Why It Matters: Reliance by User Auditors
Under auditing standards such as AU-C 402 (U.S.) and ISAE 3402 (international), when a company's financial statements depend on processes performed by a service organization, the company's auditor must obtain sufficient evidence about the relevant controls, even though those controls sit outside the company's own walls.
Why it matters
A SOC 1 report, especially a Type II report covering operating effectiveness over time, is the mechanism that lets a user auditor rely on the service organization's controls instead of testing them directly, which is why customers' finance and audit teams so often request one by name.
How Does SOC 1 Work?
Management first documents a written description of the system, the services provided, and the control objectives (or criteria) relevant to ICFR. An independent CPA firm then examines that description and either tests the design of controls at a point in time (Type I) or tests both design and operating effectiveness over a review period, typically six to twelve months (Type II). The result is a report containing management's assertion, the auditor's opinion, the system description, and, for Type II, the detailed tests performed and their results.
Why it matters
Because Type II testing happens over months rather than on a single day, it gives customers' auditors far stronger evidence than a one-time assessment, which is why most customers expect Type II once a service organization has matured past its first Type I report.
SOC 1 Requirements Explained
SOC 1 has no fixed, universal control list like ISO 27001's Annex A. Management defines the control objectives relevant to its own services, subject to the auditor's judgment that they suitably address risks to ICFR. Reports must also identify Complementary User Entity Controls (CUECs), controls the customer itself is expected to operate, and Complementary Subservice Organization Controls (CSOCs) for any subprocessors the service organization relies on.
Why it matters
Missing or poorly defined CUECs and CSOCs are among the most common gaps found during readiness assessments, and they matter to customers directly: a CUEC is a control the customer has to operate on its own side for your report's assurance to hold.
Implementation Process
Readiness for a SOC 1 engagement typically involves scoping the in-scope services and systems, defining control objectives tied to ICFR risks, documenting policies and procedures, remediating control gaps, and running a readiness assessment or mock examination before engaging a CPA firm for the formal Type I or Type II examination.
Why it matters
Organizations pursuing SOC 1 for the first time usually start with a Type I report to validate control design, then move to Type II once controls have operated consistently for a full review period. Avantcert supports scoping, control design, and remediation ahead of your CPA firm's examination.
Certification Process, and Why It Works Differently
SOC 1 is not a certification, and there is no ISO-style accredited certification body involved. The examination is performed by an independent, licensed CPA firm, licensed by a state board of accountancy and subject to AICPA peer review, not accredited under ISO/IEC 17021. The deliverable is an attestation report bearing the CPA firm's opinion, distributed under NDA to existing and prospective customers and their auditors, not a public certificate or logo.
Why it matters
Because the report itself, not a certificate, is the deliverable, choosing an experienced CPA firm and preparing thoroughly for the examination matters more than for a typical ISO audit. Avantcert helps you prepare your control environment and documentation so the CPA firm's examination goes smoothly.
Benefits of SOC 1
A current SOC 1 report reduces the number of one-off audit visits and security questionnaires a service organization has to field each year, since it gives customers' auditors evidence they can rely on directly. It's frequently a stated requirement in RFPs and vendor due-diligence processes for payroll, fund administration, claims processing, and finance-adjacent SaaS providers, and the underlying readiness work tends to sharpen internal control discipline more broadly.
Why it matters
A SOC 1 Type II report, refreshed annually, becomes a standing answer to most customer audit-evidence requests, freeing your team from repeating the same control walkthroughs for every customer's auditor individually.
Conclusion
A SOC 1 report is not a certificate and there's no accredited body issuing one, it's an independent CPA firm's opinion on controls relevant to your customers' financial reporting. Getting to a clean Type II opinion takes real work: scoping, control design, remediation, and sustained operation of those controls over the review period, but the result is evidence your customers' auditors can actually rely on. Whether you're preparing your first Type I report or maintaining an annual Type II cycle, SOC 1 gives your customers' finance and audit teams a standard, trusted way to get comfort over your controls without visiting your facility themselves.
Getting Started with SOC 1
Avantcert has supported 3,000+ organizations across 40+ markets on their certification and compliance journeys. For SOC 1, our experts handle the heavy lifting, from gap analysis through implementation to your SOC 1 report, so your team can stay focused on the business.
Your timeline and cost depend on your size, scope, and current maturity. See our certification cost guide for the cost drivers, or use the free estimator for a tailored figure. When you’re ready, talk to an Avantcert SOC 1 expert for a free quote and a clear roadmap.
About Avantcert
Avantcert is an ISO and compliance certification consultancy that helps organizations achieve SOC 1 compliance through readiness assessment, control design, remediation support, and coordination with your independent CPA audit firm. Avantcert has supported 3,000+ organizations across 40+ markets, following a proven four-stage methodology, Gap Analysis, Implementation, Internal Review, and Audit Support. To begin your SOC 1 readiness journey, request a free quote or talk to an Avantcert expert.
SOC 1 FAQs
What is SOC 1?
SOC 1 is an AICPA attestation report on a service organization’s controls that are relevant to its clients’ internal control over financial reporting (ICFR).
What is the difference between SOC 1 and SOC 2?
SOC 1 covers controls relevant to clients’ financial reporting; SOC 2 covers security and the Trust Services Criteria. Pick SOC 1 if you affect clients’ financials, SOC 2 for data security.
What is the difference between SOC 1 Type I and Type II?
Type I assesses control design at a point in time; Type II tests operating effectiveness over a period. Customers typically expect Type II.
Who needs SOC 1?
Payroll processors, data centres, and software/service providers whose services affect their customers’ financial statements.
How long and how much does SOC 1 cost?
Readiness typically takes 3-6 months. The audit is performed by a licensed CPA firm and billed separately.
Related certifications
Avantcert also helps organizations achieve these related standards, often alongside SOC 1 as part of one programme: ISO 27001, SOC 2, CMMC 2.0, NIST CSF, HITRUST, PCI DSS. Not sure which you need? Use the free estimator or talk to an expert.
Official reference: AICPA, SOC reports.
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