SOC 1 vs SOC 2: What's the Difference?
SOC 1 and SOC 2 are both AICPA System and Organization Controls reports produced by an independent auditor, but they answer different questions. SOC 1 is about controls at a service organization that are relevant to its customers' internal control over financial reporting (ICFR) — it matters when the service you provide could affect your customers' financial statements, such as payroll processing, payment handling or claims administration. SOC 2 is about controls relevant to security and, optionally, availability, processing integrity, confidentiality and privacy — it is evaluated against the AICPA's Trust Services Criteria and is the report most technology and SaaS vendors are asked for by security-conscious customers. Each comes in two flavours: a Type I report assesses whether the controls are suitably designed at a single point in time, while a Type II report tests whether those controls actually operated effectively over a period, usually several months to a year — Type II carries far more weight because it shows the controls work in practice, not just on paper. Which one you need depends on what you do: a vendor whose service touches customers' financial reporting needs SOC 1; a vendor handling customer data who wants to demonstrate security posture needs SOC 2. SOC 3 is a related report — a public, general-use summary of a SOC 2 examination that can be shared freely for marketing, without the detailed control descriptions and test results that make a full SOC 2 restricted-use. This article is general information, not legal advice.
SOC 1 and SOC 2 are both independent audit reports under the AICPA's System and Organization Controls framework, but they answer different questions. The quickest way to remember it: SOC 1 is about controls that could affect your customers' financial reporting; SOC 2 is about how you protect customer data. This article is general information, not legal advice.
What SOC reports are
A SOC report is produced by an independent CPA firm that examines the controls at a "service organization" — a company that operates systems or processes on behalf of its customers — and issues an opinion. The point is assurance for someone else: your customers (and their auditors) want independent evidence that the controls you claim to have actually exist and work, without having to audit you themselves. SOC 1 and SOC 2 differ in which controls are in scope and against what criteria they are judged.
SOC 1: controls over financial reporting
SOC 1 focuses on controls at a service organization that are relevant to its customers' internal control over financial reporting (ICFR). It matters when the service you provide feeds into your customers' financial statements. Classic SOC 1 candidates are payroll processors, payment processors, billing and collections services, and insurance claims administrators — organisations whose processing, if it went wrong, could misstate a customer's financial results. The scope of a SOC 1 is defined by control objectives tied to financial reporting, and its primary audience is your customers' finance teams and their external auditors.
SOC 2: controls over security and data
SOC 2 focuses on controls relevant to the AICPA's Trust Services Criteria: Security (always included — it is the common criteria), plus any of Availability, Processing Integrity, Confidentiality and Privacy that you choose to include based on what you promise customers. SOC 2 is the report most SaaS, cloud and B2B technology vendors are asked for, because it speaks to the question security-conscious buyers actually care about: can we trust you with our data? The scope is defined by which Trust Services Criteria you include, so two SOC 2 reports are not necessarily comparable — always check which criteria a report covers. Preparing for one is largely a matter of closing the gap between your actual controls and the criteria, which is what a SOC 2 readiness checklist is designed to do before you ever engage an auditor.
Type I versus Type II
Both SOC 1 and SOC 2 come in two types, and the difference is about design versus operation:
- Type I evaluates whether the controls are suitably designed at a single point in time. It is a snapshot — it says the right controls exist and are designed to meet the objectives as of a specific date.
- Type II goes further and tests whether those controls operated effectively over a period of time, usually several months up to a year. It samples evidence across the period to show the controls were actually followed, consistently, not just present on one day.
Type II carries much more weight with sophisticated buyers precisely because it demonstrates the controls work in practice over time. Many organisations start with a Type I to show design, then move to Type II once they have run the controls long enough to be examined over a period. When a customer asks for "your SOC 2," they very often mean a SOC 2 Type II.
Who needs which
Match the report to what your service does:
- You affect customers' financial reporting — payroll, payments, billing, claims. You need a SOC 1.
- You handle customer data and want to prove security — SaaS, cloud, data processors, most B2B tech. You need a SOC 2.
- Both are true — for example a fintech that both processes money relevant to financial statements and stores sensitive customer data. You may need both.
If you are the one requesting reports from a vendor rather than producing them, knowing which report to expect for a given service is part of due diligence; our vendor security assessment checklist and a vendor risk scorecard help you ask for the right report, with the right scope and type, and read it critically.
Where SOC 3 fits
SOC 3 is based on the same Trust Services Criteria examination as SOC 2, but it is a general-use, public report. A full SOC 2 contains detailed system and control descriptions and the auditor's test results, which is sensitive, so SOC 2 reports are restricted-use and usually shared under NDA. A SOC 3 strips out that detail and presents just the auditor's opinion, so it can be published openly on a website or handed to anyone. Think of SOC 3 as the shareable marketing summary of a SOC 2.
A note on "certification"
SOC reports are attestations, not certificates. An independent CPA firm examines your controls and issues a report with an opinion; there is no pass/fail badge and no central registry. So "SOC 2 certified" really means "we have a SOC 2 report" — and the useful questions are always which criteria it covers, whether it is Type I or Type II, what period it covers, and whether the opinion is clean. If you also pursue an ISO 27001-based ISMS, note that ISO 27001 does issue a certificate, which is one of the practical differences between the two approaches; our ISO 27001 readiness checklist covers that path.
Frequently asked questions
What is the difference between SOC 1 and SOC 2? SOC 1 covers controls relevant to customers' financial reporting (ICFR); SOC 2 covers security and optionally availability, processing integrity, confidentiality and privacy, against the Trust Services Criteria.
Type I vs Type II? Type I checks that controls are suitably designed at a point in time; Type II tests that they operated effectively over a period, so it carries more weight.
Who needs which? SOC 1 if your service affects customers' financial statements (payroll, payments, claims); SOC 2 if you handle customer data and must demonstrate security; sometimes both.
What is SOC 3? A public, general-use summary of a SOC 2 examination, without the sensitive detail, suitable for sharing openly.
Is SOC 2 a certification? No — it is an attestation report with an auditor's opinion, not a certificate. "SOC 2 certified" means "has a SOC 2 report"; always check its scope, type and period.
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