samsearch
    Platform
    01InfluenceShape the requirement before it's on your competitor's radar.
    Signal
    Recompete window opens in 42 days
    Facilities maintenance IDIQ$8.4M
    Forecast
    Agency spend up 18% next FY
    DoD facilitiesQ3 window
    02CaptureFind and qualify the work across every market.
    Federal91%
    Network engineering support — GSA MAS
    GSA541512
    SLED88%
    Custodial services — Fairfax County Public Schools
    K-12561720
    DIBBS79%
    Aircraft hydraulic fitting — DLA Aviation
    DLANSN 5330
    03AnalyzeExtract requirements and build the compliance matrix.
    Compliance matrix
    L.2.1Technical approachVol I
    L.3.4Staffing planVol I
    M.1Past performanceEvaluated
    SOW breakdown
    Requirements extracted38
    Mapped to Section L/M38
    Every extractionCited
    Ask Sammy
    “Do we meet the small business set-aside?”
    04ManageRun the pursuit through to award.
    Pipeline
    QualifyFacilities support · USACE
    CaptureComms upgrade · DLA
    ProposalShipyard dredging · NAVSEA
    PriyaAlex
    This week
    Submit past performance refsThu
    Confirm subK teamingFri
    Upload SF 33Mon
    05RespondDraft and submit your response.
    Drafting · Volume I
    247 words
    RFI response
    CompanyAcme Robotics LLC
    UEIJK4M8…
    Capability narrativeDrafted
    06FinanceGet paid faster on what you win.
    Capital available
    $2.4M against your award
    Facilities maintenance IDIQAwarded
    Partner matched
    LenderFederal Capital Partners
    Draw available$2.4M
    UnderwritingCleared
    The platform
    Influence
    Capture
    Analyze
    Manage
    Respond
    Finance
    One pipeline, six stages, start to award.
    See the whole platform
    Solutions
    By industry
    Tech & softwareSoftware and SaaS companies entering GovCon.Defense contractorsPrimes and subs in the defense industrial base.ConstructionBuilders bidding federal, state, and local work.CybersecuritySecurity vendors pursuing federal mandates.
    By team
    Capture managers & BDPipeline, qualification, and win strategy.Proposal teamsCompliance matrices and proposal drafting.Subcontractors & primesTeaming, subcontracting, and partner fit.
    By company size
    Small businessesSet-aside and small business contractors.EnterpriseLarge contractors running multiple pursuits.ConsultantsAdvisors and capture consultants.
    Browse all industries
    CustomersPricing
    ResourcesNew
    Learn
    AcademyCourses, guides, and playbooks.WebinarsLive sessions and recordings.DocsProduct documentation and setup guides.Implementation planOperational rollout guidance.
    Tools & data
    Free GovCon toolsCalculators, lookups, and more.Gov ExploreContracts, agencies, and NAICS codes.GovCon eventsConferences, training, and set-aside events.
    Latest blogIntroducing the New SamSearch: The Operating System for Government ContractingSamSearch has a new brand, a new site, and a new way of explaining what the platform actually does — the operating system for government contracting, organized around six stages instead of a single search box. Here's what changed and why.Read the post →
    All resources and tools
    Sign inRequest a demo
    Home/FAR Navigator/28/28.1/28.101/28.101-4

    FAR Navigator

    • 1Federal Acquisition Regulations System
    • 2Definitions of Words and Terms
    • 3Improper Business Practices and Personal Conflicts of Interest
    • 4Administrative and Information Matters
    • 5Publicizing Contract Actions
    • 6Competition Requirements
    • 7Acquisition Planning
    • 8Required Sources of Supplies and Services
    • 9Contractor Qualifications
    • 10Market Research
    • 11Describing Agency Needs
    • 12Acquisition of Commercial Products and Commercial Services
    • 13Simplified Acquisition Procedures
    • 14Sealed Bidding
    • 15Contracting by Negotiation
    • 16Types of Contracts
    • 17Special Contracting Methods
    • 18Emergency Acquisitions
    • 19Small Business Programs
    • 22Application of Labor Laws to Government Acquisitions
    • 23Environment, Energy and Water Efficiency, Renewable Energy Technologies, Occupational Safety, and Drug-Free Workplace
    • 24Protection of Privacy and Freedom of Information
    • 25Foreign Acquisition
    • 26Other Socioeconomic Programs
    • 27Patents, Data, and Copyrights
    • 28Bonds and Insurance
      • 28.000Scope of part.
      • 28.001Definitions.
      • 28.1Subpart 28.1
        • 28.100Scope of subpart.
        • 28.101Bid guarantees.
          • 28.101-1Policy on use.
          • 28.101-2Solicitation provision or contract clause.
          • 28.101-3Authority of an attorney-in-fact for a bid bond.
          • 28.101-4Noncompliance with bid guarantee requirements.
        • 28.102Performance and payment bonds and alternative payment protections for construction contracts.
        • 28.103Performance and payment bonds for other than construction contracts.
        • 28.104Annual performance bonds.
        • 28.105Other types of bonds.
        • 28.106Administration.
      • 28.2Subpart 28.2
      • 28.3Subpart 28.3
    • 29Taxes
    • 30Cost Accounting Standards Administration
    • 31Contract Cost Principles and Procedures
    • 32Contract Financing
    • 33Protests, Disputes, and Appeals
    • 34Major System Acquisition
    • 35Research and Development Contracting
    • 36Construction and Architect-Engineer Contracts
    • 37Service Contracting
    • 38Federal Supply Schedule Contracting
    • 39Acquisition of Information Technology
    • 40Reserved
    • 41Acquisition of Utility Services
    • 42Contract Administration and Audit Services
    • 43Contract Modifications
    • 44Subcontracting Policies and Procedures
    • 45Government Property
    • 46Quality Assurance
    • 47Transportation
    • 48Value Engineering
    • 49Termination of Contracts
    • 50Extraordinary Contractual Actions and the Safety Act
    • 51Use of Government Sources by Contractors
    • 52Solicitation Provisions and Contract Clauses
    • 53Forms
    Up to 28.101
    subsectionUpdated April 16, 2026

    FAR 28.101-4—Noncompliance with bid guarantee requirements.

    Plain-English Summary

    FAR 28.101-4 explains what happens when a bidder or offeror does not comply with a solicitation’s bid guarantee requirement. It covers the consequences in sealed bidding, the treatment of noncompliance in negotiated procurements when award may be made on initial proposals without discussions, and the different handling when discussions are held and the deficiency can be corrected. It also lists specific situations in which noncompliance must be waived, unless the contracting officer makes a written determination that accepting the bid would be detrimental to the Government’s interest. Those waiver situations include only one offer received, a shortfall in the guarantee amount that still covers the gap to the next higher acceptable offer, partial coverage for a quantity the offeror is otherwise eligible to receive, late receipt waived under FAR 14.304, inadequacy caused by correction of a mistake, and certain bid bond defects such as missing offeror signature, erroneous or missing date, or failure to name the United States as obligee when other identifying information is correct. In practice, this section protects the Government’s ability to enforce bid security while also preventing rejection for minor or technical defects that do not materially affect the Government’s protection. It is important because bid guarantee defects can determine whether a bid or proposal is rejected, waived, or corrected, which can directly affect award eligibility and competition outcomes.

    Key Rules

    Sealed bidding requires rejection

    In sealed bidding, failure to comply with a solicitation’s bid guarantee requirement generally means the bid must be rejected. The only exception is when one of the listed waiver situations applies and the contracting officer does not make a written determination that acceptance would be detrimental to the Government.

    Negotiated awards may be rejected or corrected

    In negotiations, a noncompliant bid guarantee makes an initial proposal unacceptable if the agency intends to award on initial proposals without discussions. If discussions will occur, deficiencies in bid guarantees for offerors in the competitive range must be addressed during discussions and the offeror must be given a chance to fix the problem.

    Waiver for one offer received

    If only one offer is received, noncompliance with the bid guarantee requirement must be waived unless the contracting officer writes that acceptance would harm the Government’s interest. The contracting officer may still require the guarantee before award.

    Waiver for minor amount shortfall

    A bid guarantee that is less than required may still be waived if it is at least equal to the difference between the offer price and the next higher acceptable offer. This prevents rejection where the Government still has adequate protection against the price difference risk.

    Waiver for partial quantity coverage

    If the guarantee is sufficient for a quantity the offeror is otherwise eligible to receive, the deficiency is waived, but any award cannot exceed the quantity covered by the guarantee. This rule allows award on a reduced basis when the guarantee supports only part of the offer.

    Waiver for late or corrected defects

    Late bid guarantees may be waived if late receipt is waived under FAR 14.304, and a guarantee that becomes inadequate because of a corrected mistake may be accepted if the bidder increases the guarantee to the required level for the corrected bid. These rules prevent technical timing or correction issues from causing unnecessary rejection when the underlying bid remains otherwise proper.

    Waiver for certain bond defects

    An otherwise acceptable bid bond is not rejected merely because the offeror did not sign it, the date is wrong or missing, or the United States is not listed as obligee, so long as the bond otherwise correctly identifies the offeror, solicitation number, and project location and is acceptable in all other respects. These are treated as curable or nonmaterial defects.

    Responsibilities

    Contracting Officer

    Determine whether the solicitation requires a bid guarantee and enforce the requirement in sealed bidding and negotiated procurements. Reject noncompliant bids or initial proposals when required, or waive defects only in the listed circumstances unless a written detrimental-interest determination is made. In negotiated procurements with discussions, raise bid guarantee deficiencies during discussions and allow correction. Document any decision that acceptance would be detrimental to the Government’s interest.

    Contractor / Offeror / Bidder

    Submit a bid guarantee that fully complies with the solicitation, including amount, form, timing, and required identifying information. If a deficiency is identified in a negotiated procurement with discussions, correct it promptly when given the opportunity. If a bid is corrected for mistake, increase the guarantee to the required level if the correction makes the original guarantee inadequate.

    Agency

    Ensure solicitations clearly state bid guarantee requirements and that acquisition personnel apply the rejection, waiver, and correction rules consistently. Support contracting officers in documenting detrimental-interest determinations and in handling late submissions, mistakes, and bond defects in accordance with the FAR.

    Practical Implications

    1

    A missing or defective bid guarantee can be fatal in sealed bidding, so contractors should treat the requirement as a strict responsiveness issue unless a listed waiver clearly applies.

    2

    In negotiated acquisitions, the outcome depends heavily on whether the agency plans to award on initial proposals without discussions; if so, a defective guarantee can make the proposal unacceptable, but if discussions occur, the defect may be cured.

    3

    Not every defect requires rejection. Minor bond problems such as a missing offeror signature, wrong date, or failure to name the United States as obligee may be waived if the bond is otherwise acceptable and properly identifies the solicitation and project.

    4

    Contracting officers must be careful to document any decision that acceptance would be detrimental to the Government’s interest, because the waiver rules apply unless that written determination is made.

    5

    When a bid is corrected for mistake, the guarantee must be revisited; a guarantee that was sufficient before correction may become inadequate afterward, and the bidder must increase it to the required level or risk rejection.

    Official Regulatory Text

    (a) In sealed bidding, noncompliance with a solicitation requirement for a bid guarantee requires rejection of the bid, except in the situations described in paragraph (c) of this subsection when the noncompliance shall be waived. (b) In negotiation, noncompliance with a solicitation requirement for a bid guarantee requires rejection of an initial proposal as unacceptable, if a determination is made to award the contract based on initial proposals without discussion, except in the situations described in paragraph (c) of this subsection when noncompliance shall be waived. (See 15.306 (a)(2) for conditions regarding making awards based on initial proposals.) If the conditions for awarding based on initial proposals are not met, deficiencies in bid guarantees submitted by offerors determined to be in the competitive range shall be addressed during discussions and the offeror shall be given an opportunity to correct the deficiency. (c) Noncompliance with a solicitation requirement for a bid guarantee shall be waived in the following circumstances unless the contracting officer determines in writing that acceptance of the bid would be detrimental to the Government’s interest when- (1) Only one offer is received. In this case, the contracting officer may require the furnishing of the bid guarantee before award; (2) The amount of the bid guarantee submitted is less than required, but is equal to or greater than the difference between the offer price and the next higher acceptable offer; (3) The amount of the bid guarantee submitted, although less than that required by the solicitation for the maximum quantity offered, is sufficient for a quantity for which the offeror is otherwise eligible for award. Any award to the offeror shall not exceed the quantity covered by the bid guarantee; (4) The bid guarantee is received late, and late receipt is waived under 14.304 ; (5) A bid guarantee becomes inadequate as a result of the correction of a mistake under 14.407 (but only if the bidder will increase the bid guarantee to the level required for the corrected bid); (6) An otherwise acceptable bid bond was submitted with a signed offer, but the bid bond was not signed by the offeror; (7) An otherwise acceptable bid bond is erroneously dated or bears no date at all; or (8) A bid bond does not list the United States as obligee, but correctly identifies the offeror, the solicitation number, and the name and location of the project involved, so long as it is acceptable in all other respects.

    Back to 28.101FAR Navigator
    samsearch

    The Complete AI Platform for Government Contracting

    Platform
    • Product
    • Pricing
    • ROI calculator
    • Integrations
    • Changelog
    Solutions
    • Solutions
    • Customers
    • Comparisons
    • Market watch
    Resources
    • Blog
    • Free GovCon tools
    • Glossary
    • Docs
    Company
    • API & partnerships
    • Careers
    • Support
    • Compliance
    • Trust centre
    • Contact
    Recognised & verified
    SOC 2 Type II Compliant, SamSearchAWS Partner - Advanced, SamSearch on AWS MarketplaceGartner Peer Insights Customer First, SamSearch
    Ask AI about samsearch
    Ask ChatGPTAsk ClaudeAsk Perplexity
    Follow

    © 2026 samsearch. All rights reserved.

    Terms of usePrivacy policy