Cost Accounting Standards (CAS)
Cost Accounting Standards (CAS) are a set of 19 standards designed to achieve uniformity and consistency in the cost accounting practices used by certain government contractors. CAS ensures that the federal government pays fair and reasonable prices by requiring contractors to apply consistent cost allocation and accounting methods across contracts.
What Are Cost Accounting Standards (CAS)?
Cost Accounting Standards (CAS) are a set of 19 standards designed to achieve uniformity and consistency in the cost accounting practices used by certain government contractors.
CAS ensures that the federal government pays fair and reasonable prices by requiring contractors to apply consistent cost allocation and accounting methods across contracts.
CAS is administered by the Cost Accounting Standards Board (CASB) and codified in Title 48, Chapter 99 of the Code of Federal Regulations and Federal Acquisition Regulation Part 30. CAS requirements are incorporated into contracts through specific FAR clauses.
Key Characteristics of CAS
The 19 standards address areas such as consistency in estimating, accumulating, and reporting costs; allocation of indirect costs; treatment of depreciation; pension costs; home office allocations; and independent research and development (IR&D).
Contractors under full CAS coverage must submit a CAS Disclosure Statement detailing cost accounting practices, indirect cost allocation methods, treatment of direct vs. indirect costs, and home office allocation structures — creating transparency and allowing auditors to verify consistency.
Full CAS Coverage
Applies when a contractor receives a single CAS-covered award of $50 million or more, or $50 million in net CAS-covered awards during the preceding cost accounting period. Requires submission of a formal Disclosure Statement.
Modified CAS Coverage
Applies to negotiated contracts over $7.5 million if the contractor is not otherwise exempt. Requires compliance with a subset of the 19 standards.
Exempt Contracts
Certain contracts are exempt, including small business contracts, sealed bid contracts, contracts below the Truthful Cost or Pricing Data threshold, and commercial item contracts.
Regulatory Framework
CAS compliance is governed by:
Title 48, Chapter 99 of the Code of Federal Regulations
Federal Acquisition Regulation Part 30 (CAS Administration)
Cost Accounting Standards Board (CASB) rules and interpretations
The Defense Contract Audit Agency (DCAA) frequently reviews CAS compliance during pre-award accounting system reviews, forward pricing audits, incurred cost audits, and business system audits.
Why CAS Matters for Contractors
CAS protects taxpayer dollars by enabling consistent cost audits and preventing cost manipulation. For contractors, CAS compliance enables eligibility for large negotiated contracts, reduces risk of cost disallowance, prevents retroactive adjustments, and improves audit defensibility. Noncompliance can lead to:
Cost disallowances
Contract price adjustments
Payment withholds
Financial penalties
For example, without CAS, one contractor might allocate overhead heavily to government work while another spreads overhead differently. CAS requires both to apply consistent, disclosed cost allocation methods, ensuring the government can fairly compare proposals and audit costs on a $100 million cost-reimbursement contract.
Common Misconceptions About CAS
CAS applies to all contracts.
CAS applies only to certain negotiated contracts above specific dollar thresholds.
CAS and FAR are the same.
FAR governs procurement broadly. CAS specifically governs cost accounting consistency.
CAS compliance is only about accounting.
CAS affects pricing strategy, indirect rate structures, and overall business systems.
Frequently Asked Questions
What happens if a contractor changes its accounting practice?
A change must be disclosed and evaluated for cost impact. The government may require a price adjustment.
Are subcontractors subject to CAS?
Yes, if the subcontract meets CAS thresholds and is not otherwise exempt.
What is a CAS noncompliance finding?
A determination that a contractor's accounting practices do not comply with CAS requirements, potentially requiring financial adjustments.
Related Government Contracting Topics
Truthful Cost or Pricing Data Requirements: Federal requirements for contractors to submit accurate cost data in support of price negotiations.
Indirect Rate Structures: The allocation methodology for overhead and G&A costs across contracts.
Cost-Reimbursement Contracts: Contract type where the government pays allowable incurred costs, making CAS compliance especially critical.
Business System Reviews: DCMA and DCAA evaluations of contractor accounting, estimating, and purchasing systems.
Incurred Cost Submissions: Annual contractor filings for auditing actual costs incurred on cost-reimbursement contracts.
Cost Accounting Standards form one of the most technically significant compliance frameworks in federal contracting. For contractors pursuing large negotiated awards, CAS compliance is not optional. It is foundational to pricing credibility, audit readiness, and long-term eligibility for major government contracts.