Reasonableness & Allocability — The Two Tests That Decide Most Disputes
Also known as: Prudent person standard, benefit test, cost allocability
What you do here: Show the amount is what a prudent business would have paid, and that the contract actually benefited from it
At a Glance
- Who it applies to
- Every contractor billing or pricing from cost — these are the two tests auditors apply most often
- What it obligates
- Justify the amount (reasonableness) and the assignment to the contract (allocability), both with documentation
- Governing authority
- FAR 31.201-3 (reasonableness) and FAR 31.201-4 (allocability)
- Key trap
- FAR 31.201-3(a) — no presumption of reasonableness attaches to a cost the contracting officer challenges
- The stakes
- The most common source of questioned costs in a DCAA incurred cost audit
What It Is
Reasonableness and allocability are the two judgment-based tests inside FAR 31.201-2, and in practice they decide most cost disputes. Reasonableness (FAR 31.201-3) asks about the amount: a cost is reasonable if, in its nature and amount, it does not exceed what would be incurred by a prudent person in the conduct of competitive business. The FAR tells the analyst what to weigh — whether the cost is of a type generally recognized as ordinary and necessary for the business, the restraints imposed by arm's-length bargaining and by law and regulation, whether the contractor's people acted with the responsibility they owe the company, its owners, its employees, and the government, and whether the contractor departed from its own established practices in a way that raised the cost. The sting is in FAR 31.201-3(a): no presumption of reasonableness attaches to the incurrence of a cost by a contractor, and if the contracting officer challenges a specific cost, the burden of establishing reasonableness rests on the contractor. Allocability (FAR 31.201-4) asks a different question: does this contract deserve to be charged? A cost is allocable if it is assignable or chargeable to one or more cost objectives on the basis of relative benefits received or another equitable relationship, and it is allocable if it is (a) incurred specifically for the contract, (b) benefits both the contract and other work and can be distributed in reasonable proportion to the benefits received, or (c) is necessary to the overall operation of the business even though a direct relationship to a particular cost objective cannot be shown. Category (a) is your direct cost; categories (b) and (c) are the intellectual foundation of overhead and G&A. The two tests are independent: an eye-wateringly expensive consultant might be perfectly allocable to the contract that used them and still be unreasonable in amount, while a modest, obviously reasonable expense might be entirely unallocable because it benefited only your commercial line of business.
When It Applies
- In a DCAA incurred cost audit, where questioned costs are most often framed as unreasonable in amount or unallocable to the contract.
- When you charge an executive's compensation, a bonus, a related-party lease, or a consultant to a federal contract.
- When you decide which pool a shared cost belongs in and on what base it should be spread.
- When you defend a request for equitable adjustment or a claim, where the government tests both the amount and the causal connection.
- When you buy from an affiliate or a related party, where arm's-length bargaining did not restrain the price.
Key Features
| Feature | What It Means |
|---|---|
| The prudent-person standard | Reasonableness is measured against what a prudent business operating in competition would have paid — not against what you were willing to pay. |
| No presumption in your favor | FAR 31.201-3(a) expressly denies any presumption of reasonableness; once the contracting officer challenges a cost, you must establish it. |
| Departure from your own practice is evidence | One of the listed reasonableness factors is whether the contractor significantly deviated from its established practices in a way that increased the cost. |
| Allocability is a benefit test | The question is whether the contract received a benefit — directly, proportionally with other work, or as part of running the business overall. |
| Three routes to allocable | Incurred specifically for the contract (direct), benefits several objectives in reasonable proportion (overhead), or necessary to the overall business (G&A). |
| Related-party costs get extra scrutiny | Without arm's-length bargaining there is no market restraint on the price, so auditors test reasonableness against outside market evidence. |
The SDVOSB Angle
Small firms lose reasonableness arguments on two recurring fronts: owner compensation and related-party transactions. In a closely held SDVOSB the service-disabled veteran owner is often the CEO, the capture lead, and a billable technical resource, and it is entirely legitimate to charge that labor — but the amount has to be defensible against market compensation for the role, not simply set at whatever the company can afford in a good year. The same is true of leasing office space from an entity the owner also controls: with no arm's-length bargaining, an auditor will test the rent against market comparables and question the excess. The protective habit is documentation created contemporaneously, not reconstructed: a written compensation policy benchmarked to a recognized salary survey, a board or member resolution setting officer pay, a market study or comparable leases supporting a related-party rent. On the allocability side, the discipline that matters most is consistency — deciding once whether a category of cost is direct or indirect and then treating it the same way on every contract, because a firm that direct-charges a cost on a cost-type contract while carrying the same kind of cost in overhead elsewhere has created an allocability problem that follows it into every audit.
How to Comply
- Benchmark owner and executive compensation to a recognized salary survey for the role, industry, and geography, and document the analysis before you pay it.
- Support related-party leases, purchases, and services with market comparables — arm's-length bargaining is the restraint the FAR expects.
- Write down your cost-allocation methodology (which costs go direct, which go to which pool, and on what base) and follow it consistently.
- When you allocate a shared cost, be able to explain the benefit relationship in one sentence — that sentence is your allocability defense.
- Keep the business purpose of each significant cost in the record at the time it is incurred, not reconstructed under audit.
- Flag unusual, one-time, or unusually large costs in advance with the contracting officer, and use an advance agreement under FAR 31.109 where the treatment is genuinely uncertain.
Watch Out For
- Assuming that because you actually paid it, it's reasonable — FAR 31.201-3(a) says the opposite when a cost is challenged.
- Setting owner compensation from cash flow rather than from market data for the role actually performed.
- Related-party rent, equipment, or services with no comparables in the file — the classic questioned-cost finding for a small firm.
- Charging a cost directly to one contract when the same type of cost sits in an indirect pool on another; that inconsistency is itself a finding.
- Allocating a cost to a contract because it has budget rather than because it received the benefit.
- Treating allocability as an accounting formality — a cost that benefited only your commercial work is unallocable no matter how reasonable its amount.
Run the Numbers
Frequently Asked
What is the 'prudent person' standard in FAR 31.201-3?
FAR 31.201-3 says a cost is reasonable if, in its nature and amount, it does not exceed that which would be incurred by a prudent person in the conduct of competitive business. In applying it, the analysis weighs whether the cost is of a type generally recognized as ordinary and necessary for the contractor's business or for contract performance, the restraints of arm's-length bargaining and of applicable law and regulation, whether the contractor's people acted with the responsibility they owe to the business, its owners and employees, and the government, and whether the contractor significantly departed from its own established practices in a way that increased the cost.
Is a cost presumed reasonable because I actually paid it?
No — and this is the single most misunderstood sentence in FAR Part 31. FAR 31.201-3(a) states that no presumption of reasonableness attaches to the incurrence of costs by a contractor, and that if an initial review of the facts results in a challenge of a specific cost by the contracting officer or the contracting officer's representative, the burden of proof is on the contractor to establish that the cost is reasonable. Having genuinely paid the money proves the cost was incurred; it does not prove the amount was reasonable.
What does it mean for a cost to be allocable to a contract?
Under FAR 31.201-4, a cost is allocable if it is assignable or chargeable to one or more cost objectives on the basis of relative benefits received or another equitable relationship. Specifically, a cost is allocable if it is incurred specifically for the contract; if it benefits both the contract and other work and can be distributed to them in reasonable proportion to the benefits received; or if it is necessary to the overall operation of the business even though a direct relationship to any particular cost objective cannot be shown. Those three routes correspond, in practice, to direct costs, overhead, and general and administrative expense.
Why do auditors scrutinize owner compensation at a small business?
Because in a closely held company there is no arm's-length bargaining to restrain the amount — the person setting the salary and the person receiving it are the same, so one of the reasonableness restraints the FAR relies on is absent. Auditors therefore test owner and executive compensation against market data for comparable roles, industries, revenue sizes, and geographies, and question the excess. A contemporaneous compensation policy benchmarked to a recognized salary survey, plus a corporate resolution setting the pay, is the most effective defense. Note also that a statutory cap set annually by the Office of Federal Procurement Policy limits the compensation of contractor employees that may be allocated to federal contracts.
Primary Sources
- FAR 31.201-3 — Determining reasonableness
- FAR 31.201-4 — Determining allocability
- FAR 31.205-6 — Compensation for personal services
- FAR 31.201-2 — Determining allowability
Plain-English reference, not legal, accounting, or tax advice. Cost allowability and accounting determinations are fact-specific, and the FAR, the Cost Accounting Standards, and the statutory dollar thresholds quoted here are amended and escalated for inflation over time. Always read the current FAR text and the cost and payment clauses in your specific contract, confirm the applicable thresholds and your accounting treatment with the contracting officer or cognizant administrative contracting officer, and consult a qualified government-contract accountant or counsel before relying on a cost position, signing a certificate, or submitting a claim.
Change log (1)
- LaunchedPublished the federal cost principles, indirect rates & government accounting requirements reference covering how the government decides what an SDVOSB may charge it — the five allowability tests of FAR 31.201-2, reasonableness and allocability (FAR 31.201-3 / 31.201-4), the expressly unallowable costs of FAR 31.205 with directly associated costs (FAR 31.201-6) and the FAR 42.709 / 52.242-3 penalty, the direct-vs-indirect consistency rule (FAR 31.202 / 31.203), the fringe/overhead/G&A pool-and-base structure behind a wrap rate, provisional billing rates (FAR 42.704), the incurred cost submission and final indirect rate settlement (FAR 52.216-7(d) / 42.705 / 42.708 quick closeout), the adequate accounting system tested on the SF 1408 (FAR 16.301-3 / 9.106), timekeeping and labor charging with floor checks and total time accounting, DCAA audits versus DCMA administrative contracting officer determinations, certified cost or pricing data and defective pricing (FAR 15.403-1 / 15.403-4 / 15.406-2 / 52.215-10), and the Cost Accounting Standards with the small-business exemption at 48 CFR 9903.201-1 — each with an at-a-glance quick-facts card, a when-it-applies list, a key-features table, an SDVOSB-specific angle, a how-to-comply checklist, watch-outs, FAQPage, Article, Dataset, and BreadcrumbList structured data, primary-source FAR / U.S.C. / CFR citations, and cross-links into the glossary, contract types, payment methods, thresholds, clauses, forms (SF 1408), regulation explainers, contracting roles, how-to guides, FAQ, and the price-to-win, size-standard, win-probability, and limitations-on-subcontracting calculators.