Ask most research administrators what “Cost Accounting Standards” means and the honest answer is: not the full nineteen standards a federal contractor has to worry about. Universities and other institutions of higher education (IHEs) are subject to a deliberately narrower slice — four standards, incorporated by reference into 2 CFR 200 at 2 CFR 200.419, and codified in their original form at 48 CFR Part 9905. Everything on this page is scoped to that narrower, university-specific set. If you administer a genuine CAS-covered government contract (as opposed to a grant or cooperative agreement) rather than an IHE receiving federal awards under the Uniform Guidance, the full 19-standard set at 48 CFR 9904 and the CAS-covered-contract thresholds in FAR Part 30 apply instead — that is a different, contractor-facing regime and out of scope here.
Last verified: 16 August 2026, directly against the current eCFR text of 2 CFR 200.419 and 48 CFR Part 9905, and cross-checked against Acquisition.gov’s Part 9905 text and multiple university sponsored-research-office policy pages (Penn, USF, FSU, NC State, University of Utah).
Which standards actually apply to universities
The full Cost Accounting Standards Board (CASB) framework at 48 CFR 9904 contains 19 standards, built for negotiated government contracts generally. Educational institutions are carved out into their own, much smaller part of the CFR — 48 CFR Part 9905, “Cost Accounting Standards for Educational Institutions” — which contains only four standards, cross-referenced from 2 CFR 200 Appendix III (the Uniform Guidance’s indirect-cost-rate section for IHEs) and triggered under 2 CFR 200.419 once an institution’s federally sponsored funding crosses a defined threshold.
This is the single most important thing to get right on this page: if you searched for “cost accounting standards” expecting to find out which of 19 rules apply to your university, the answer is four, not nineteen. The other fifteen were never extended to IHEs.
The $50 million threshold
Under 2 CFR 200.419, an institution of higher education that receives an aggregate total of $50 million or more in federal awards subject to Uniform Guidance Subpart E during its most recently completed fiscal year must comply with 48 CFR 9905.501, .502, .505, and .506. Institutions below that threshold are not subject to the CAS requirement, though the underlying 2 CFR 200 Subpart E cost principles — reasonableness, allocability, consistent treatment — still apply to everyone regardless of size, because those are general cost-principle requirements, not CAS-specific ones.
The four standards, in plain terms
| Standard | Title | What it actually requires |
|---|---|---|
| 48 CFR 9905.501 | Consistency in Estimating, Accumulating and Reporting Costs | The cost estimates you put in a grant proposal budget must use the same cost accounting practices you then use to actually accumulate and report those costs once the award is active. You cannot estimate a cost one way at proposal stage and book it a different way once funded. |
| 48 CFR 9905.502 | Consistency in Allocating Costs Incurred for the Same Purpose | Costs incurred for the same purpose, in like circumstances, must be treated consistently — either always as a direct cost or always as an indirect (F&A) cost. You cannot charge the same type of cost directly on one award and recover it through the indirect cost pool on another, absent a genuinely different circumstance. This is the standard behind the direct-vs-F&A consistency trap covered in detail below. |
| 48 CFR 9905.505 | Accounting for Unallowable Costs | Costs that are unallowable under a specific award term, an applicable cost principle, or law must be identified and excluded from billings, claims, and proposals — and, critically, must still be tracked in the accounting system through the same allocation logic as allowable costs (an unallowable cost still gets allocated its fair share of overhead, it just doesn’t get billed to the federal award). |
| 48 CFR 9905.506 | Cost Accounting Period | Institutions must use a consistent cost accounting period — normally their established fiscal year — for accumulating and reporting costs, with defined conditions under which a different period may be used and how transition-period adjustments must be handled. |
Notice the common thread: three of the four standards are versions of the same underlying idea — treat like costs alike, consistently, across time and across awards. That idea is worth pulling apart on its own, because it’s the part that actually causes audit findings.
The consistency principle: the idea underneath all four standards
CAS 501, 502, and 506 are all, at root, expressions of a single principle: a cost incurred for the same purpose, in like circumstances, must receive the same accounting treatment — the same classification (direct vs. indirect), the same allocation method, and the same accounting period — no matter which award, sponsor, or year it’s charged to. CAS 505 extends that same logic to unallowable costs: they don’t get a different treatment method, they get excluded from what’s billed while still following the same underlying allocation rules as everything else.
The regulatory language allows exactly one escape valve: unlike circumstances. If the actual circumstances surrounding a cost genuinely differ, a different treatment is permitted — but “different treatment because it’s more convenient this time” or “different treatment because this sponsor pays better” is not an unlike circumstance. A real unlike-circumstances case has to be documented, defensible, and tied to something factually different about the situation, not the funding source.
The direct-vs-F&A consistency trap
This is the practical failure mode that CAS 502 exists to catch, and it is the single most common CAS finding in practice. It happens like this:
- An institution’s negotiated F&A rate (documented in its NICRA) is built on the assumption that certain categories of cost — general-purpose administrative and clerical salaries, basic office supplies, local telephone service, postage — are normally recovered through the indirect cost pool, not charged directly to individual awards.
- A principal investigator, under pressure to make a tight project budget work, charges one of those same cost types directly to a specific federal award — say, a project-dedicated administrative assistant’s salary, charged as a direct labor cost on one NIH grant — while the institution continues to recover that same category of cost through its F&A rate on every other award.
- The institution is now charging the same type of cost, incurred for the same essential purpose, inconsistently: direct here, indirect everywhere else. That is a textbook CAS 502 violation, and it is exactly the pattern federal auditors and cognizant-agency reviewers are trained to look for, because it amounts to double-recovery — the institution collects for the same cost twice, once through direct billing and once through the F&A rate baked into every other award.
The unlike-circumstances exception, done properly
Direct-charging a normally-indirect cost type is not automatically wrong. 2 CFR 200 Appendix III and the underlying CAS framework both permit it when the circumstances are genuinely unlike the norm — for example, a project that requires a dedicated, full-time administrative coordinator managing a large multi-site consortium award, a level of administrative burden well beyond what the institution’s standard F&A rate was calculated to cover. Doing this defensibly requires:
- Documentation at the proposal stage, not after the fact — the unlike circumstance should be identified and justified in the budget justification when the direct charge is first proposed, ideally with sponsor pre-approval where the award terms require it.
- A specific, factual reason the circumstance differs — project scope, complexity, or scale that is genuinely unusual relative to the institution’s typical award, not simply “this PI prefers it” or “the budget was tight.”
- Consistency in how the exception is applied — if a cost type is treated as an unlike-circumstance direct charge on one award, the institution needs a documented, defensible basis for why it is not treated the same way on comparable awards; ad hoc, PI-by-PI inconsistency in applying the exception is itself a CAS finding waiting to happen.
- Institutional policy, not individual discretion — most universities formalize this through a written direct-charging policy (sometimes built directly around a sample list of “normally indirect, exceptionally direct” cost categories and the documentation each requires) precisely so the exception doesn’t turn into ad hoc PI-level inconsistency across the institution.
The DS-2 (Disclosure Statement)
The Cost Accounting Standards Board Disclosure Statement, commonly called the DS-2, is the document in which an institution formally describes its cost accounting practices — the practices CAS 501, 502, 505, and 506 require it to apply consistently. It is reproduced at 2 CFR Part 200 Appendix III.
A real, load-bearing 2024 change
Before 1 October 2024, crossing the $50 million threshold created a standalone requirement to file the DS-2 with the institution’s cognizant federal agency for indirect costs, with any amendment to disclosed practices requiring 6 months’ advance notice. OMB’s April 2024 revision to the Uniform Guidance (effective for awards made on or after 1 October 2024) removed the standalone DS-2 filing requirement from the regulatory text. The underlying CAS 501/502/505/506 compliance obligation itself was not removed — only the separate mandate to submit a dedicated form documenting it.
In practice, most institutions above the threshold continue to maintain a DS-2-format document internally, both as their own governance record of disclosed cost accounting practices and as supporting documentation during F&A rate negotiation, even though a standalone regulatory filing is no longer independently mandated. If you’re relying on an older institutional policy page or a vendor summary that describes DS-2 filing as an unconditional, ongoing requirement, treat it as dated — verify against the current 2 CFR 200.419 text directly.
What the DS-2 covers
A DS-2 (whether filed with a cognizant agency or maintained internally) is organized around several parts, each describing a category of the institution’s cost accounting practices:
| Part | What it discloses |
|---|---|
| General information | Institutional structure, fiscal year, accounting system description, and the organizational units covered by the statement. |
| Direct vs. indirect cost classification | The institution’s criteria for deciding whether a given cost type is normally charged direct or recovered through F&A — the practices CAS 502 requires be applied consistently. |
| Indirect cost pools and allocation bases | How indirect costs are grouped into pools (general administration, departmental administration, operations and maintenance, library, sponsored-programs administration, and the like) and the base used to allocate each pool across benefiting activities. |
| Depreciation and use allowances | Methods and useful-life assumptions used for capital equipment and facilities depreciation, which feed the F&A rate calculation. |
| Compensated personal absence (leave) | How vacation, sick leave, and other paid absence costs are accounted for and allocated. |
| Other disclosed practices | Deferred compensation, insurance, and any other cost accounting practice material to how sponsored-award costs are estimated, accumulated, or reported. |
Because the DS-2 documents the institution’s disclosed practices, any change in those practices — moving a cost category from indirect to direct treatment institution-wide, changing a depreciation method, restructuring indirect cost pools — obligates the institution to update the disclosure and, where the change affects existing awards, work through the cost-impact implications with its cognizant agency, since sponsors are entitled to be protected from cost increases that result purely from an accounting-practice change rather than a real cost change.
How CAS interacts with the Uniform Guidance cost principles
It helps to keep two layers separate, because they’re easy to conflate:
- 2 CFR 200 Subpart E sets the general cost principles — reasonableness, allocability, and consistent treatment — that apply to every institution receiving federal awards, regardless of size. This is the baseline everyone operates under.
- CAS 501/502/505/506 is a more specific, more formal layer of consistency requirements that applies only once an institution crosses the $50 million federal-funding threshold. CAS doesn’t introduce new substantive cost-allowability rules on top of Subpart E — it formalizes and audits the consistency with which an institution applies the classification and allocation practices Subpart E already requires. An institution that has never crossed the threshold is still bound by Subpart E’s own consistent-treatment requirement (2 CFR 200.403(d)); it just isn’t subject to the CAS-specific compliance and disclosure mechanics layered on top.
The NICRA negotiation process and CAS compliance are closely linked in practice: the cost accounting practices an institution discloses (formally via DS-2 or informally through its rate proposal) are the same practices its negotiated F&A rate is built on, and inconsistency between disclosed practice and actual charging practice is exactly what an F&A rate audit or a Single Audit is checking for.
Unallowable costs and CAS 505
An unallowable cost under 2 CFR 200 (alcoholic beverages, entertainment, lobbying, fundraising, alumni activities, and a defined list of others under 2 CFR 200.421-200.475) cannot be billed, claimed, or proposed against a federal award. CAS 505 adds a specific institutional-process requirement on top of that basic prohibition: unallowable costs must be identified and segregated in the accounting system, not simply omitted from the final bill. That distinction matters because an unallowable cost still needs to flow through the same allocation logic as an allowable one for indirect-cost-rate purposes — an institution that fails to properly identify and segregate unallowable costs risks inflating its F&A rate base, which is itself a separate and serious audit finding distinct from directly billing an unallowable cost to an award.
What a CAS non-compliance finding means
A CAS finding typically surfaces through one of three channels: a Single Audit (the annual compliance audit required of institutions expending $1 million or more in federal awards under 2 CFR 200 Subpart F), a cognizant-agency review tied to F&A rate negotiation, or a sponsor-specific award audit. The practical consequences of a confirmed finding can include:
- Cost disallowance — costs charged inconsistently with disclosed or required practice can be disallowed and must be repaid or removed from the award.
- Cost-impact adjustment — if a disclosed-practice change increased costs to the government relative to prior practice, the institution may owe a retroactive adjustment.
- Increased audit scrutiny — a confirmed finding typically increases the depth and frequency of subsequent reviews of that institution’s cost accounting practices.
- Reputational and negotiating-position cost — a documented history of CAS findings weakens an institution’s position in future F&A rate negotiations with its cognizant agency.
None of this is exotic or punitive by design — the standards exist to ensure the government is charged the same way everyone else is charged for the same type of cost, and most findings trace back to exactly the direct-vs-F&A inconsistency pattern described above, not to deliberate misconduct.
Frequently asked questions
Do all 19 Cost Accounting Standards apply to universities?
No. Only four — 48 CFR 9905.501, .502, .505, and .506 — apply to educational institutions, and only once an institution’s federal award funding crosses the $50 million threshold in 2 CFR 200.419. The remaining fifteen standards under 48 CFR 9904 apply to CAS-covered government contracts generally, not to IHEs receiving grants and cooperative agreements.
What does “cas covered contract” mean for a university?
A “CAS-covered contract” in the traditional sense — subject to the full 48 CFR 9904 standard set and FAR Part 30 thresholds — is a government contracting concept, distinct from the grants and cooperative agreements that make up the large majority of university federal awards. Most university sponsored research is not a CAS-covered contract in that narrower FAR sense; it is instead subject to the four educational-institution-specific standards under 48 CFR Part 9905, via 2 CFR 200.419, once the $50 million threshold is crossed. An institution that also holds a genuine federal procurement contract above the relevant FAR Part 30 threshold could separately become subject to the full CAS-covered-contract regime for that specific contract — that is a distinct compliance track from the Uniform Guidance-driven Part 9905 requirement covered on this page.
Is the DS-2 still required to be filed?
The standalone requirement to file the DS-2 with a cognizant federal agency was removed from the Uniform Guidance effective for awards made on or after 1 October 2024. Institutions above the $50 million threshold are still required to comply with CAS 501/502/505/506 itself; many continue to maintain a DS-2-format document internally as governance and F&A-negotiation support, even though a standalone regulatory filing is no longer independently mandated.
What triggers a DS-2 amendment?
Any material change to a disclosed cost accounting practice — for example, moving a cost category between direct and indirect treatment institution-wide, or changing a depreciation methodology — obligates the institution to update its disclosed practices and address the cost-impact implications for existing awards, since a change that increases cost to the government beyond what would have occurred under the prior practice can trigger a required adjustment.
Can a PI charge a normally-indirect cost directly to a grant?
Only under a genuine, documented “unlike circumstances” justification — unusual project scope, scale, or complexity that differs materially from the institution’s typical award, established and ideally pre-approved at the proposal stage, and applied consistently rather than ad hoc. Charging a normally-indirect cost type directly simply because a budget is tight, without a documented unlike circumstance, is the core direct-vs-F&A consistency violation CAS 502 is designed to catch.
This page covers general Cost Accounting Standards requirements for US institutions of higher education under 48 CFR Part 9905 and 2 CFR 200.419. It is not legal or audit advice; consult your institution’s sponsored programs office, cognizant agency guidance, or institutional counsel for a specific compliance determination.
