How to choose a SOC 2 auditor: cost and scope
Interactive estimators
Cost ranges
| Item | Range | Notes |
|---|---|---|
| Boutique CPA firm | $12K–$35K | Often efficient for focused, single-product scopes |
| National or specialist firm | $25K–$70K+ | Pricing reflects complexity, service model, and reviewer depth |
| Large global firm | $50K–$150K+ | May suit buyer expectations or complex multinational scopes |
| Change-of-auditor transition | $3K–$15K internal effort | Budget for walkthroughs, evidence remapping, and procurement |
What drives variance
Auditor selection should optimize competence, independence, communication, report acceptance, and scope fit—not the lowest fee. Quotes diverge when firms assume different system boundaries, categories, sample sizes, observation windows, or readiness levels. Confirm whether remediation follow-up, bridge letters, extra locations, and report revisions are included. Automation-platform marketplace relationships can simplify intake, but management should independently verify licensure and independence.
Sources & methodology
Frequently Asked Questions
Not by default. Compare scope assumptions, TSC categories, observation window, sample sizes, remediation support, and whether your target buyers accept the firm's brand — a cheap quote with a mismatched boundary often costs more later.
Confirm CPA licensure and SOC practice experience. Use state board or CPAverify lookups and ask for peer references from SaaS companies with similar system complexity.
Same system description boundary, in-scope TSC categories, Type I vs Type II, observation period, entity list, subservice organization treatment, and deliverable format — otherwise fee comparisons mislead.
When enterprise procurement names a firm, multi-entity scope is complex, or global coordination is required. Many mid-market SaaS companies succeed with specialist or boutique CPAs at lower cost.
Platforms may streamline intake, but management selects the CPA firm. Verify independence, scope, and pricing directly with the auditor — platform relationships are convenience, not a substitute for diligence.