SOC 1 vs SOC 2: The Complete 2026 Comparison Guide

SOC 1 vs SOC 2 is the first question a service organisation faces once a customer asks for “your SOC report”, and the answer depends on what the customer’s auditor is worried about. SOC 1 is about the numbers: controls at your organisation that affect your customers’ financial statements. SOC 2 is about the system: security, availability, processing integrity, confidentiality and privacy, for anyone who relies on it. This guide sets out the SOC 1 vs SOC 2 difference, who asks for which, when you need both, and what changes in the work.

What this guide covers

• SOC 1 vs SOC 2 in one table
• SOC 1 vs SOC 2: what SOC 1 covers that SOC 2 does not
• SOC 1 vs SOC 2: what SOC 2 covers that SOC 1 does not
• SOC 1 vs SOC 2: who asks for which
• SOC 1 vs SOC 2, or both: when a service organisation needs two reports
• SOC 1 vs SOC 2: what changes in the work
• SOC 1 vs SOC 2 vs ISO 27001
• Getting the SOC 1 vs SOC 2 decision right
• Frequently asked questions

SOC 1 vs SOC 2 in one table

SOC 1 vs SOC 2: what SOC 1 covers that SOC 2 does not

A SOC 1 report answers a question a user auditor is obliged to ask under AU-C 402 or ISA 402: can the controls at this service organisation be relied on for the transactions and balances that flow into my client’s financial statements? Its control objectives are written around financial-statement assertions — that transactions are authorised, complete, accurate, recorded in the right period and reported correctly — and around the IT general controls those application controls depend on. Management specifies the objectives itself, which means a SOC 1 report for a payroll processor and one for a fund administrator have different objectives, tailored to what each does. Our SOC 1 report guide walks through the document.

A SOC 2 report has nothing to say about whether payroll deductions were calculated correctly. It can say that access to the payroll system was restricted, that changes were controlled and that the system was available — but not that the number on the customer’s ledger is right. A customer’s auditor holding only a SOC 2 report has evidence about the environment and none about the processing.

SOC 1 vs SOC 2: what SOC 2 covers that SOC 1 does not

SOC 2 is written against the Trust Services Criteria, a published set that is the same for every organisation, organised on the common criteria (CC1 to CC9) plus the additional criteria for availability, processing integrity, confidentiality and privacy. It reaches every part of a system that handles customer data, whether or not any of that data ends up in a financial statement. Business continuity, vendor management, incident response, encryption and privacy practices all belong in a SOC 2 report; in a SOC 1 report they belong, at most, in the unaudited “other information” section. The Trust Services Criteria explained sets out the categories.

The reader is different too, and that is the SOC 1 vs SOC 2 distinction in practice. A SOC 2 report is read by a security team deciding whether to onboard a vendor, and by a procurement team ticking a due-diligence box. Those readers are not the intended users of a SOC 1 report, and a SOC 2 report is not written for a financial-statement auditor’s reliance.

SOC 1 vs SOC 2: who asks for which

The request tells you which side of SOC 1 vs SOC 2 you are on, if you listen to where it came from.

• “Our auditors need your SOC 1.” The customer is audited, your service touches its books, and its auditor needs evidence of operating effectiveness across its financial year. SOC 1 Type 2. This is the request every payroll, benefits, custody and claims provider receives.
• “Send us your SOC 2 before we can sign.” The customer’s security or vendor-risk function is assessing you as a supplier. SOC 2 Type 2; the security criteria are the part every SOC 2 report must include. This is the request every SaaS company receives.
• “We need a SOC 1 and a SOC 2.” The customer relies on you for financial processing and holds its data with you. A hosted general-ledger, a payroll platform that is also a SaaS product, a fund administrator running a client portal. Both, and the ITGC evidence overlaps.
• “Are you SOC compliant?” The customer has not decided what it needs. Ask which of its functions is asking — finance and audit means SOC 1, security and procurement means SOC 2 — before quoting for either.

SOC 1 vs SOC 2, or both: when a service organisation needs two reports

A company that processes financial transactions for customers and holds their data is on both sides of SOC 1 vs SOC 2, and the two reports are two engagements with two descriptions, two sets of criteria and two opinions — usually from the same auditor, in the same fieldwork window, but reported separately. What overlaps is the IT general controls: logical access, change management, computer operations, backup and physical security appear in a SOC 1 report as ITGC objectives and in a SOC 2 report under the common criteria, and the same evidence serves both if the control descriptions are written once and mapped.

What does not overlap in SOC 1 vs SOC 2 is the business-process layer. The SOC 1 objectives about authorised, complete and accurate processing have no SOC 2 counterpart, and the SOC 2 criteria on risk assessment, monitoring, vendor management and incident response have no place in a SOC 1 examination unless they support a stated financial-reporting objective. The two descriptions are different documents; a service organisation that submits its SOC 2 system description for a SOC 1 engagement will be asked to start again.

SOC 1 vs SOC 2: what changes in the work

SOC 1 vs SOC 2 also differs in where the effort falls. For a SOC 2 examination the hard work is implementing controls against criteria someone else wrote and evidencing them across the period.

For a SOC 1 examination the hard work is earlier: management has to specify its own control objectives, and they have to be reasonable — relevant to user entities’ financial-statement assertions, objective, measurable and complete. The AICPA’s guidance for management spells out those four attributes, and an objective worded so it can never fail, or so two readers would disagree on whether it was met, will be raised by the auditor. Then management writes the description of the system to eight required elements, states complementary user entity controls and subservice organisation dependencies, and signs an assertion the auditor examines.

Both sides of SOC 1 vs SOC 2 share the Type 1 / Type 2 distinction — a date or a period — and the discipline that follows from it: evidence retained from day one, changes captured through the period, deviations recorded whoever finds them. Our SOC 1 Type 2 vs Type 1 and SOC 2 Type 1 vs Type 2 guides cover each side.

SOC 1 vs SOC 2 vs ISO 27001

ISO 27001 is a certification of an information security management system against a published standard, issued by an accredited certification body and valid for three years with surveillance audits. It is closer to SOC 2 in subject and unlike either SOC report in form: a certificate, not an auditor’s opinion on a description. It has nothing to do with financial reporting, so it never substitutes for a SOC 1 report. Our ISO 27001 vs SOC 2 comparison covers the security side of that choice.

Getting the SOC 1 vs SOC 2 decision right

Decide from the request, not the brand. If a customer’s auditor is asking, it is SOC 1 and it is Type 2. If a customer’s security team is asking, it is SOC 2. If both are asking, run both from one set of ITGC controls.

For the SOC 1 side, the SOC 1 Toolkit supplies what management has to write — the description in every required section, a library of 19 control objectives with 76 risks and 77 controls, the CUEC and subservice registers, both assertions and the representation checklist — and its ITGC crosswalk maps the eight IT general control objectives to the SOC 2 common criteria so the shared controls are written once.

For the security side, the SOC 2 Toolkit is the policy set. If you are starting with the financial-reporting question, start with the SOC 1 Toolkit.

Further reading in this series: SSAE 18 explained and ISAE 3402 explained on the two SOC 1 standards, SOC 1 control objectives on what replaces the Trust Services Criteria, the SOC 1 audit checklist, and SOC 1 audit cost.

Frequently asked questions

Is SOC 1 or SOC 2 harder to obtain?

SOC 1 vs SOC 2 is hard in different places. SOC 1 requires management to specify and defend its own control objectives and to write a description of transaction processing that a financial-statement auditor can follow. SOC 2 requires implementing and evidencing the Trust Services Criteria across a whole system. A service organisation with mature financial controls and thin security practices will find SOC 2 harder; a SaaS company will find SOC 1 harder, because it has never had to think in financial-statement assertions.

Can a SOC 2 report replace a SOC 1 report?

No, and this is the misunderstanding that costs the most. A SOC 2 report says nothing about whether transactions were processed completely and accurately, which is what a user auditor needs. The AICPA’s SOC suite overview sets the two apart by subject matter and intended user.

Which one does SOX 404 care about?

SOC 1, and the answer here is settled by who relies on the report. A company subject to SOX 404 that outsources payroll or another financial process relies on the provider’s SOC 1 report as evidence about that process, and its auditor evaluates the report under AU-C 402. SOC 2 reports may still be reviewed for IT general controls, but the financial-process reliance is SOC 1.

Is SOC 1 the same as SSAE 18?

SSAE 18 is the AICPA statement that issued AT-C section 320, the standard under which a SOC 1 examination is performed. SOC 1 is the name of the report. An “SSAE 18 report” and a SOC 1 report are the same document.