How do I switch SOC 2 auditors?
Wait until your current report is issued, gather your scope and prior reports, request quotes from new firms, sign an engagement letter, and hand over your system description and evidence. No AICPA approval or transfer process is required.
The full answer
The switch is a procurement decision, not a regulated handoff. Because SOC 2 reports are attestations issued under the AICPA's SSAE No. 18 standards, there is no central registry or approval step; you simply end one engagement and start another. Time it for after your current report is delivered to avoid overlapping periods.
Prepare a scope package for new firms: which Trust Services Criteria you cover, your system description, your GRC platform, headcount, and copies of prior SOC 2 reports. Sharing prior reports (under NDA, since they are confidential) helps a new auditor scope accurately and quote fairly.
Collect quotes and compare. The typical US market range is $5,000 to $60,000-plus depending on scope per Vanta, Drata, and Secureframe guides; audits booked through the AuditNex network start at $2,500 and average about $5,000. Confirm the firm is a licensed CPA firm and ask about platform integrations that pull evidence directly.
Sign the new engagement letter, confirm your report period, and provide access to your evidence and systems. If there is a gap between your last period end and the new one, management can issue a bridge letter covering up to about three months.
Go deeper
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Related questions
Can I switch SOC 2 auditors mid-cycle?
Yes. No AICPA rule locks you to one auditor. It is cleanest to switch between report periods, but you can change mid-cycle if your current engagement has not started fieldwork or has stalled.
Can I use a different auditor for Type 1 and Type 2?
Yes. Type 1 and Type 2 are separate engagements, so you can use different CPA firms for each. Many companies do, though keeping one firm can streamline the Type 2 since it already knows your controls.
Do I lose my SOC 2 history if I change auditors?
No. You keep every SOC 2 report you have already received, and your control and evidence history stays yours. A new auditor builds on that record; changing firms does not erase your prior reports.
Does a new auditor accept my old SOC 2 evidence?
Often yes, but they must re-test it themselves. A new auditor can review evidence and prior reports you provide, yet independence rules mean they form their own conclusions rather than relying on the previous firm's work.
How much can I save by switching SOC 2 auditors?
Potentially thousands, depending on scope. US SOC 2 audits range from $5,000 to $60,000-plus, while audits booked through the AuditNex network start at $2,500 and average about $5,000, so overpaying firms leave real room to save.
When is the best time to switch SOC 2 auditors?
Right after your current report is issued and before your next observation period begins. That timing avoids splitting a Type 2 window, keeps coverage continuous, and gives the new firm a clean period to plan.
Sources: AICPA SSAE No. 18 attestation standards; Vanta, Drata, and Secureframe SOC 2 pricing guides, 2024-2026; AuditNex network rate card, 2026. Answer written and maintained by the AuditNex research team; last reviewed July 26, 2026. AuditNex is a marketplace — accredited firms price and scope engagements independently.