What Is CAS (Cost Accounting Standards) and Why Does It Matter?

If your business is pursuing larger federal contracts, you may encounter Government Contract Cost Accounting Standards (CAS). These standards were established to ensure consistency and transparency in how contractors estimate, accumulate, and report costs to the government.

CAS is a set of 19 detailed standards issued by the Cost Accounting Standards Board (CASB). While small businesses and fixed-price contracts are often exempt, many cost-reimbursement contracts—especially those over $7.5 million—fall under full or modified CAS coverage.

So, why does CAS matter?

CAS compliance ensures that you treat similar costs in the same way across contracts and reporting periods. It helps prevent unfair cost allocation, double billing, and misrepresentation of indirect costs. The government uses these standards to protect taxpayer dollars and evaluate whether your pricing and billing practices are fair and consistent.

Failing to comply with Government Contract Cost Accounting Standards can lead to audit findings, contract disputes, and even financial penalties.

At N5 Specialized Accounting Services & Support, we help contractors determine whether CAS applies to them, implement compliant systems, and prepare for audits. If you’re scaling your government work or submitting cost proposals for major contracts, it’s critical to get ahead of CAS requirements.