What Does SOX Compliance Actually Cost?
SOX (Sarbanes-Oxley) compliance is mandatory for public companies. Costs depend on company size, complexity of financial processes, and whether you are a smaller reporting company or a large accelerated filer.
| Company Size | Estimated Annual Cost | Key Cost Drivers |
|---|---|---|
| Smaller reporting company | $50,000 – $200,000 | External audit, internal testing, documentation |
| Mid-cap ($250M – $1B revenue) | $200,000 – $1,000,000 | Internal audit team, IT controls, external audit |
| Large-cap ($1B+ revenue) | $1,000,000 – $5,000,000+ | Full internal audit function, extensive ITGC testing |
Section 404(b) external auditor attestation is required for accelerated filers and adds significant cost — often $100,000 – $500,000+ annually.
Budget Tier Recommendations
Smaller reporting company (under $150,000): Leverage the COSO 2013 framework with automation tooling. Smaller reporting companies may be exempt from Section 404(b) external attestation, which is the biggest cost saver.
Mid-cap ($150,000 – $500,000): Automation platform for ITGC testing and evidence collection, supplemented by a co-sourced internal audit function. Budget for external auditor attestation.
Large-cap ($500,000+): Full internal audit team, dedicated GRC platform, and a Big 4 or large regional external auditor.
Our Recommendation
For the cheapest path, we recommend LowerPlane — starting at $4,000/year, it automates IT general control (ITGC) testing, evidence collection for Section 404 walkthroughs, and maps controls to the COSO framework. Customers typically reduce external audit fees by up to 30% through organized, pre-tested evidence packages.
Where to Cut Costs
- Automate ITGC testing. IT general controls (change management, access controls, operations) are the most labor-intensive area. Automation cuts testing time by 50% or more.
- Rationalize your control environment. Fewer key controls means less testing. Eliminate redundant controls.
- Use data analytics for testing. Automated testing of full populations is often cheaper and more effective than manual sampling.
- Co-source internal audit. A co-sourced model costs less than a full-time internal audit department.
Where Not to Cut Costs
- External auditor quality. Your Section 404(b) attestation firm must satisfy PCAOB standards. Cutting corners here risks restatements.
- Entity-level controls. Tone at the top and control environment are foundational. Weak entity-level controls affect the entire assessment.
- IT change management. Deficiencies in change management are the most common material weakness in IT controls.
Get Started
Try LowerPlane → and reduce your SOX compliance costs.