01Use the low end for specialist CPA firms
Specialists usually price lower when the scope is Security-only and evidence is already organized.
Adjust company size, audit type, auditor tier, Trust Services Criteria, readiness, vendors, and locations. The calculator gives a planning range, then the cost guide explains the underlying ranges.
Estimate your audit cost based on your specific requirements
Tell us your scope. We send it to firms that fit. They reply with a ballpark, a timeline, and what makes them different.
Free. Side-by-side on price, timeline, and fit. Pick one firm. Have one call.
The calculator is a planning tool. Real quotes still depend on scope, systems, criteria, and how much readiness work is left.
Specialists usually price lower when the scope is Security-only and evidence is already organized.
Multiple criteria, regulated buyers, complex infrastructure, and Big Four requirements push cost up.
The audit fee is not the whole cost. Budget for GRC software, evidence owners, remediation, and optional testing.
What the estimate means and when to use the cost guide instead.
Send the scope once and ask firms to reply against the same assumptions.
Free. Side-by-side on price, timeline, and fit. Pick one firm. Have one call.