Grant Thornton US Auditor Profile
Grant Thornton LLP is one of the largest professional services networks in the world, and its US member firm ranks among the top seven accounting firms nationally. With approximately 9,000 professionals in over 50 US offices, Grant Thornton serves a wide range of mid-market and enterprise clients across compliance, audit, tax, and advisory services.
What Grant Thornton US Does Well
Enterprise-grade capabilities at mid-market pricing is Grant Thornton's core value proposition. The firm invests heavily in methodology, technology, and training that rival the Big Four, while maintaining pricing that is meaningfully more accessible for mid-market companies.
Government and public sector expertise is a distinctive strength. Grant Thornton is one of the largest auditors of US government agencies and contractors, giving them unmatched experience with FedRAMP, CMMC, NIST 800-53, and other government-oriented frameworks.
Global network integration through Grant Thornton International means US clients expanding internationally can access consistent audit quality across 140+ countries. This is particularly valuable for multi-framework engagements that span jurisdictions.
Engagement Process
Grant Thornton follows a rigorous, risk-based audit methodology. Engagements begin with detailed planning and scoping, followed by control environment assessment, evidence collection, and substantive testing. The firm assigns dedicated engagement teams with framework-specific expertise and provides structured project management throughout.
Pricing Expectations
SOC 2 Type II audits for mid-market companies range from $30,000 to $65,000. FedRAMP 3PAO assessments are priced significantly higher, often $150,000 or more. ISO 27001 certification starts at $25,000. Grant Thornton positions its pricing between RSM and the Big Four.
Who Should Choose Grant Thornton US
Grant Thornton is best suited for mid-market and upper-mid-market companies that need robust audit capabilities, particularly those in government contracting, financial services, or technology. Organizations requiring international coverage will benefit from the global Grant Thornton network.