Cost Accounting Standards Compliance Guide: Reduce Audit Risk and Win More Federal Contracts for Small Businesses

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A plain guide to Cost Accounting Standards for small federal contractors. It explains thresholds, exceptions, and steps to cut audit risk and win bigger contracts.

• Check if CAS rules apply by looking at contract type, dollar limits, and exemptions such as small business or sealed bidding.

• Build a simple, recorded cost system with clear policies, a chart of accounts, and a structure for indirect rates before you seek CAS contracts.

• Follow FAR Part 30 and CAS Board rules to limit audit issues and protect your fee.

• Use market data (for example, from USAspending.gov) to see if chasing CAS work fits your growth plan.

• Use GovScout to search SAM.gov faster (/search), save & track opportunities (/pipeline), and draft AI proposal outlines (/ai-proposals) that match your cost system.

Why Cost Accounting Standards Matter Now

Cost Accounting Standards are federal rules that set how some contractors measure, assign, and share costs on government contracts. They matter because:

• Many small firms now go after larger cost-reimbursement and IDIQ orders that reach CAS limits.

• Agencies and auditors (DCAA/DCMA) closely view indirect rates and cost splits.

• Not meeting CAS rules can cause audit findings, price changes, holds, and poor past performance records that hurt future wins.

When you know when CAS applies and set up a simple, right-size compliance plan, you let your firm grow into bigger contracts without tough audit issues.

Step-by-Step: Managing Cost Accounting Standards as a Small Business

Step 1: Understand What Cost Accounting Standards Are (and Aren’t)

CAS stands for a set of 19 rules from the Cost Accounting Standards Board. These rules guide how you measure and assign costs on some contracts. In short:

• CAS gives rules for cost consistency.

• FAR Part 31 tells which costs count or do not count on government contracts.

• GAAP is for overall financial reporting and does not control federal cost rules.

Even if you follow GAAP, you might break CAS if you change methods between contracts or over time.

When evaluators look at your work, they see that your costs depend on consistent and recorded practices. They also see that you keep cost methods alike across contracts and periods, so costs do not shift to hide overruns.

Step 2: Decide If CAS Applies to You

First, decide if a contract is:

• CAS-exempt

• Modified CAS-covered

• Full CAS-covered

2.1 Learn Key Limits and Exceptions

Read these sources:

• 41 U.S.C. chapter 15 (CAS statutes)

• 48 CFR Chapter 99 (CAS Board rules)

• FAR Part 30 (CAS administration) and FAR 52.230-x clauses

Do not guess. Check current limits because they change.

Typical exemptions include:

• Sealed bid contracts

• Contracts below the CAS dollar level

• Contracts for small businesses

• Contracts with prices fixed by law or regulation

• Commercial item contracts

• Contracts with foreign governments under some deals

Compliance Watch

Look at all contract clauses. If you see any FAR 52.230-1 through 52.230-6 clauses, then CAS rules hold. If they are absent, you may count as exempt. Confirm details if the contract value nears the limit.

2.2 Quick Check Table for CAS Status

(This table is an example; check current limits in the rules)

Small business on any contract

Often Exempt

Confirm with FAR clauses. Keep consistent work.

Commercial item contract

Use FAR Part 12 and 31 instead of CAS.

Sealed bid, firm-fixed-price below limit

Use standard accounting, yet be consistent.

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