1. What Grounds Can Support a Federal Bid Protest?
A contractor may challenge a federal award when an agency violates procurement law or fails to follow the solicitation. Under 4 CFR Part 21, the Government Accountability Office (GAO) reviews qualifying protests. An unfavorable score alone is insufficient. The alleged error generally must affect the protester's competitive opportunity.
Evaluation Errors and Unequal Treatment
Federal agencies must evaluate proposals against the solicitation's stated criteria. Potential protest grounds include:
- Applying evaluation criteria not disclosed in the solicitation.
- Treating materially similar proposals differently without justification.
- Overlooking relevant technical information in a proposal.
- Making an unsupported best-value determination.
- Selecting an offeror whose proposal fails a material requirement.
A viable challenge connects the suspected error to a specific evaluation requirement. Contractors considering bid protests should distinguish procurement violations from disagreements over scoring judgment.
Standing and Competitive Prejudice
Under 4 CFR § 21.0(a), an interested party must have a direct economic interest affected by the award decision. For post-award protests, this generally means an actual bidder or offeror.
A protester must ordinarily establish a reasonable possibility of competitive prejudice. A lower-ranked bidder may struggle to do so if correcting the alleged error would not give it a substantial chance of award.
2. How Should Contractors Review an Unfavorable Award?
An award notice rarely explains the complete evaluation. Compare the solicitation, submitted proposal, and available feedback to determine whether the agency applied the stated requirements and reasonably supported its decision.
Request and Review the Debriefing
Under FAR 15.506, an unsuccessful offeror in a covered negotiated procurement generally must request a required post-award debriefing in writing within three days after receiving the award notice.
Examine the agency's technical ratings, identified weaknesses, deficiencies, and award rationale. Check whether evaluators overlooked submitted information or applied requirements inconsistently.
A debriefing may not disclose competitors' protected information. Limited disclosure alone does not establish a procurement violation.
Preserve the Procurement Record
Retain the solicitation, amendments, final proposal, evaluation notices, debriefing materials, and contracting officer communications.
Record when each document arrived and when the company learned of the suspected error. These dates may determine GAO protest timeliness.
For contractors managing government contracts, organized records also help distinguish award challenges from later performance disputes.
3. When Must a GAO Bid Protest Be Filed?
Under 4 CFR § 21.2, most GAO protests must be filed within 10 calendar days after the protester knew or should have known the basis of protest. Apparent solicitation defects and qualifying required debriefings follow different rules.
Identify the Applicable Filing Deadline
The filing period depends on the challenged action and applicable procurement procedure.
| Protest Situation | General GAO Filing Rule |
|---|---|
| Apparent solicitation defect | Before bid opening or the initial proposal deadline |
| Post-award evaluation error | Within 10 calendar days after the basis becomes known or should have been known |
| Qualifying requested and required debriefing | Generally within 10 days after the debriefing is held |
| Initial adverse action on a timely agency-level protest | Generally within 10 days after actual or constructive knowledge of that action |
Apparent solicitation defect
- General GAO Filing RuleBefore bid opening or the initial proposal deadline
Post-award evaluation error
- General GAO Filing RuleWithin 10 calendar days after the basis becomes known or should have been known
Qualifying requested and required debriefing
- General GAO Filing RuleGenerally within 10 days after the debriefing is held
Initial adverse action on a timely agency-level protest
- General GAO Filing RuleGenerally within 10 days after actual or constructive knowledge of that action
GAO generally counts calendar days, excluding the triggering day, with adjustments for weekends, federal holidays, and qualifying closures.
The required-debriefing exception under 4 CFR § 21.2(a)(2) applies to qualifying competitive-proposal procurements. An optional debriefing does not automatically extend the deadline. Certain enhanced debriefing procedures may affect when the debriefing concludes.
Calculate the CICA Stay Deadline Separately
A timely GAO protest does not necessarily suspend contract performance.
Under 31 USC § 3553(d) and FAR 33.104(c), a post-award CICA stay generally depends on GAO notifying the agency of a protest filed within 10 days after award or five days after the applicable requested and required debriefing date, whichever is later.
Certain Department of Defense procurements have additional rules under DFARS 233.104, including provisions addressing enhanced debriefings.
The government may override a stay under statutory conditions. Contractors should calculate the protest filing deadline and potential stay deadline independently.
4. Frequently Asked Questions about Federal Bid Protests
Can a Small Business Challenge an Award to a Large Business?
Yes, if the small business qualifies as an interested party and identifies a valid protest ground. However, challenges involving a competitor's small-business size status generally follow separate Small Business Administration procedures rather than ordinary GAO review. Different filing deadlines may apply.
Can a Contractor File a GAO Protest Without an Attorney?
Yes. GAO permits contractors to represent themselves, but access to materials protected by a GAO protective order is generally limited to admitted attorneys. Self-represented contractors may therefore lack access to confidential evaluation records.
02 Nov, 2026
