FAR 52.230-2—Cost Accounting Standards.
Plain-English Summary
FAR 52.230-2, Cost Accounting Standards, is the core contract clause that implements CAS coverage for negotiated federal contracts that are not exempt. It tells the contractor when the CAS rules in 48 CFR Parts 9903 and 9904 apply, when a Disclosure Statement is required, how cost accounting practices must be consistently followed, when changes to those practices must be applied prospectively and disclosed, and when equitable adjustments or price/cost allowance adjustments are required. The clause also addresses interest on Government recoveries, dispute resolution under the Contract Disputes Act, Government access to records for compliance review, and mandatory flowdown to covered negotiated subcontracts. In practice, this clause is about preventing cost shifting and ensuring the Government pays only for costs measured under consistent, disclosed, and compliant accounting practices. It is especially important for contractors with multiple CAS-covered contracts, because a change in one practice can affect pricing, billing, and final settlement across several contracts and subcontracts.
Key Rules
CAS applies unless exempt
The clause incorporates 48 CFR Part 9903 by reference unless the contract is exempt under 48 CFR 9903.201-1 or 9903.201-2. If the contract is covered, the contractor must comply with the CAS framework and related rules in Parts 9903 and 9904.
Disclosure Statement required for covered contracts
For CAS-covered contracts, the contractor must disclose its cost accounting practices in writing through a Disclosure Statement, including how it separates direct and indirect costs and how it allocates indirect costs. The disclosed practices must match the contractor’s practices used on other CAS-covered contracts and subcontracts.
Consistent cost accounting practices
The contractor must consistently use its established cost accounting practices when accumulating and reporting contract performance costs. Inconsistent treatment of similar costs can trigger noncompliance and price adjustments if the Government pays increased costs.
Changes must be prospective and disclosed
If the contractor changes a cost accounting practice for a CAS-covered contract or subcontract, the change must be applied prospectively and the Disclosure Statement must be amended. If the change affects contract price or cost allowance, the contract must be adjusted under the Changes clause or by negotiated equitable adjustment, as applicable.
CAS compliance date and later applicability
The contractor must comply with the CAS in effect on the award date, or on the date of final price agreement if certified cost or pricing data were submitted. The contractor must also comply prospectively with any CAS requirements that later become applicable to the contract or subcontract.
Government recovery for noncompliance
If the contractor or a subcontractor fails to comply with CAS or fails to follow cost accounting practices consistently and the Government pays increased costs, the contract price or cost allowance must be adjusted to recover those increased costs, plus interest. Recovery is generally limited to the Government’s increased costs on the relevant contracts, unless the contractor failed to disclose a known or knowable practice change during price negotiations.
Disputes go under the CDA
If the parties cannot agree on CAS compliance or on the amount of any cost adjustment, the disagreement is a contract dispute under 41 U.S.C. chapter 71. This means the issue is handled through the Contract Disputes Act process rather than informal disagreement alone.
Government audit and record access
The contractor must allow authorized Government representatives to examine and copy documents, papers, and records related to compliance with the clause. This supports audits, compliance reviews, and price adjustment determinations.
Mandatory subcontract flowdown
The contractor must include the substance of the clause, except the disputes paragraph, in all negotiated subcontracts and require inclusion in lower-tier subcontracts as applicable. The flowdown applies only to negotiated subcontracts above the lower CAS threshold, unless the subcontract is otherwise exempt.
Responsibilities
Contracting Officer
Determine whether the contract is exempt or CAS-covered, ensure the correct clause is included, evaluate disclosed practice changes, and negotiate or process equitable adjustments and price reductions when CAS-related changes or noncompliance affect contract cost or price.
Contractor
Disclose cost accounting practices when required, keep those practices consistent, amend the Disclosure Statement when practices change, comply with applicable CAS and related rules, permit Government access to records, and flow down the required clause to covered subcontracts.
Subcontractor
Comply with applicable CAS requirements for covered subcontracts, follow disclosed and consistent cost accounting practices, and accept the flowed-down substance of the clause when the subcontract is subject to the CAS threshold and not exempt.
Government auditors and authorized representatives
Review records, examine supporting documentation, and assess whether the contractor or subcontractor is complying with CAS, the Disclosure Statement, and consistent cost accounting practice requirements.
Agency or United States Government
Recover increased costs caused by CAS noncompliance or inconsistent practices, apply interest as required, and pursue disputes through the Contract Disputes Act process when agreement cannot be reached.
Practical Implications
This clause can affect pricing, billing, incurred cost submissions, and final indirect rate settlements, so contractors need strong internal controls over cost accounting practice changes.
A common pitfall is changing a practice for one contract or business unit without updating the Disclosure Statement or considering the impact on all CAS-covered work.
Another frequent issue is inconsistent treatment of similar costs as direct in some cases and indirect in others, which can create noncompliance and repayment exposure.
Contractors should track when CAS coverage begins, because the applicable CAS version depends on the award date or the date of final price agreement if certified cost or pricing data were used.
Prime contractors must not overlook subcontract flowdown obligations; failure to include the clause in covered subcontracts can create downstream compliance and recovery problems.
Official Regulatory Text
As prescribed in 30.201-4 (a)(1) , insert the following clause: Cost Accounting Standards (Jun 2020) (a) Unless the contract is exempt under 48 CFR 9903.201-1 and 9903.201-2, the provisions of 48 CFR Part 9903 are incorporated herein by reference and the Contractor, in connection with this contract, shall- (1) (CAS-covered Contracts Only) By submission of a Disclosure Statement, disclose in writing the Contractor’s cost accounting practices as required by 48 CFR 9903.202-1 through 9903.202-5, including methods of distinguishing direct costs from indirect costs and the basis used for allocating indirect costs. The practices disclosed for this contract shall be the same as the practices currently disclosed and applied on all other contracts and subcontracts being performed by the Contractor and which contain a Cost Accounting Standards (CAS) clause. If the Contractor has notified the Contracting Officer that the Disclosure Statement contains trade secrets and commercial or financial information which is privileged and confidential, the Disclosure Statement shall be protected and shall not be released outside of the Government. (2) Follow consistently the Contractor’s cost accounting practices in accumulating and reporting contract performance cost data concerning this contract. If any change in cost accounting practices is made for the purposes of any contract or subcontract subject to CAS requirements, the change must be applied prospectively to this contract and the Disclosure Statement must be amended accordingly. If the contract price or cost allowance of this contract is affected by such changes, adjustment shall be made in accordance with paragraph (a)(4) or (a)(5) of this clause, as appropriate. (3) Comply with all CAS, including any modifications and interpretations indicated thereto contained in 48 CFR Part 9904 , in effect on the date of award of this contract or, if the Contractor has submitted certified cost or pricing data, on the date of final agreement on price as shown on the Contractor’s signed certificate of current cost or pricing data. The Contractor shall also comply with any CAS (or modifications to CAS) which hereafter become applicable to a contract or subcontract of the Contractor. Such compliance shall be required prospectively from the date of applicability to such contract or subcontract. (4) (i) (Agree to an equitable adjustment as provided in the Changes clause of this contract if the contract cost is affected by a change which, pursuant to paragraph (a)(3) of this clause, the Contractor is required to make to the Contractor’s established cost accounting practices. (ii) Negotiate with the Contracting Officer to determine the terms and conditions under which a change may be made to a cost accounting practice, other than a change made under other provisions of paragraph (a)(4) of this clause; provided that no agreement may be made under this provision that will increase costs paid by the United States. (iii) When the parties agree to a change to a cost accounting practice, other than a change under subdivision (a)(4)(i) of this clause, negotiate an equitable adjustment as provided in the Changes clause of this contract. (5) Agree to an adjustment of the contract price or cost allowance, as appropriate, if the Contractor or a subcontractor fails to comply with an applicable Cost Accounting Standard, or to follow any cost accounting practice consistently and such failure results in any increased costs paid by the United States. Such adjustment shall provide for recovery of the increased costs to the United States, together with interest thereon computed at the annual rate established under section 6621(a)(2) of the Internal Revenue Code of 1986 ( 26 U.S.C. 6621(a)(2) ) for such period, from the time the payment by the United States was made to the time the adjustment is effected. In no case shall the Government recover costs greater than the increased cost to the Government, in the aggregate, on the relevant contracts subject to the price adjustment, unless the Contractor made a change in its cost accounting practices of which it was aware or should have been aware at the time of price negotiations and which it failed to disclose to the Government. (b) If the parties fail to agree whether the Contractor or a subcontractor has complied with an applicable CAS in 48 CFR 9904 or a CAS rule or regulation in 48 CFR 9903 and as to any cost adjustment demanded by the United States, such failure to agree will constitute a dispute under 41 U.S.C. chapter 71 , Contract Disputes. (c) The Contractor shall permit any authorized representatives of the Government to examine and make copies of any documents, papers, or records relating to compliance with the requirements of this clause. (d) The Contractor shall include in all negotiated subcontracts which the Contractor enters into, the substance of this clause, except paragraph (b), and shall require such inclusion in all other subcontracts, of any tier, including the obligation to comply with all CAS in effect on the subcontractor’s award date or if the subcontractor has submitted certified cost or pricing data, on the date of final agreement on price as shown on the subcontractor’s signed Certificate of Current Cost or Pricing Data. If the subcontract is awarded to a business unit which pursuant to 48 CFR 9903.201-2 is subject to other types of CAS coverage, the substance of the applicable clause set forth in subsection 30.201-4 of the Federal Acquisition Regulation (FAR) shall be inserted. This requirement shall apply only to negotiated subcontracts in excess of the lower CAS threshold specified in FAR 30.201-4(b) on the date of subcontract award, except that the requirement shall not apply to negotiated subcontracts otherwise exempt from the requirement to include a CAS clause as specified in 48 CFR 9903.201-1 . (End of clause)