The distinction between price realism and price reasonableness continues to trip up even sophisticated protesters. GAO’s recent decision in B-424336 reinforces a familiar, but often misunderstood, rule: in order to challenge an agency’s failure to conduct a price realism analysis, the solicitation must expressly notify offerors that the agency may, as a part of its price evaluation, consider whether proposed pricing is too low.
For contractors, misunderstanding this distinction can be fatal to a protest.
The Core Problem: Conflating “Too Low” with “Improper”
Disappointed offerors frequently argue that a competitor’s price is too low – unrealistically low, even, such that it should signal to the agency that there is performance risk or the chance that the awardee simply did not understand the solicitation’s requirements. While intuitive, that argument implicates price realism, not price reasonableness.
The distinction is critical:
- Price reasonableness asks whether price is too high (protecting again paying too much).
- Price realism asks whether a price is too low (protecting against performance risk).
GAO treats these as fundamentally different inquiries, subject to entirely different rules.
The Governing Rule in Fixed-Price Procurements
In fixed-price procurements, as in Mustang Survival Manufacturing, Inc., the rule is well-settled: Agencies are not required (or even permitted) to assess price realism unless the solicitation expressly provides for it. That rule reflects a basic allocation of risk: in fixed-price contracts, the contractor bears the risk of underpricing. The Government is generally concerned only with avoiding unreasonably high prices. Accordingly, absent a solicitation provision permitting a price realism analysis, GAO will not sustain a protest alleging that an agency should have rejected a proposal’s pricing as “too low.”
What Mustang Survival Manufacturing, Inc. Reinforces
Although fact-specific, B-424336 underscores several key principles that contractors ignore at their peril.
1. No “Backdoor” Price Realism
GAO will not permit protesters to recast a realism argument as something else. If the solicitation calls only for price reasonableness, then arguments that the awardee’s price reflects performance risk will fail. Agencies are neither required nor permitted to evaluate prices for realism in that circumstance.
2. Price Disparities Don’t Trigger Realism Review
Contractors often point to large gaps between: (1) the awardee’s price, (2) the prices of competing proposals, (3) historical pricing, and/or (4) an independent government estimate (IGCE) as evidence that realism analysis was required. GAO routinely rejects such arguments. A proposed price may be significantly below the IGCE, substantially lower than the competition or historical contracts, or even below cost and still pass muster.
3. Technical Evaluation Is Not Price Realism
Agencies retain discretion to evaluate whether an offeror’s technical approach (e.g., staffing levels, retention/hiring rates, or methodology) reflects an adequate understanding of the work. But that is a technical evaluation, not a price realism review. The line becomes important where a protest suggests that the agency should have rejected a proposal because its price was “too low to perform.” Unless the solicitation requires realism, price alone cannot be the basis for rejection.
4. The Solicitation Controls
The governing principle in B-424336, as in a host of previous protest decisions, is straightforward: the solicitation defines the scope of the evaluation. If the solicitation:
- Includes a price realism provision → realism arguments may be viable
- Includes only reasonableness → realism arguments will fail
There is no implied price realism requirement in fixed-price procurements.
Why Contractors Continue to Get This Wrong
Despite consistent precedent concerning the evaluation of price for fixed-price awards, contractors often conflate these concepts because both involve anomalous pricing (not to mention, they both sound a lot alike). But legally, they are distinct:
| Concept | Purpose | Default Rule |
| Price Reasonableness | Prevent overpayment | Always required |
| Price Realism | Assess performance risk | Only if stated in the solicitation |
The critical takeaway is that price realism is optional — and must be expressly invoked.
Practical Takeaways
1. Start (and End) with the Solicitation
Before raising any price-based protest argument, examine whether the solicitation:
- Expressly provides for price realism; or
- Warns that low prices may reflect lack of understanding, signal an unacceptable performance risk, or otherwise be rejected
If not, a “too low” argument is unlikely to succeed.
2. Don’t Misframe the Protest
Where price realism is unavailable, viable alternatives may include:
- Unequal treatment
- Evaluation irregularities (waived requirements, poor documentation, no independent basis for downgrade or rejection)
- Failure to adhere to stated criteria
Attempting to shoehorn a price realism argument into a reasonableness framework is a common (and frequently losing) strategy.
Conclusion
Mustang Survival Manufacturing, Inc. serves as another reminder that in fixed-price procurements, low prices are not inherently problematic, and often not even protestable. Absent a solicitation-mandated realism evaluation, GAO will not second-guess an agency’s acceptance of a low price. Contractors who fail to recognize that distinction risk building their protest on a legally defective theory. The lesson is simple but critical: Before arguing that a competitor’s price was too low, confirm that the solicitation makes that argument relevant in the first place.
