SBIR Phase III: Maximizing Sole-Source Procurement Pathways

SBIR Phase III offers a powerful, underutilized sole-source authority that allows agencies to bypass traditional competition requirements.

GovCon Architect Editorial Team·October 7, 2026

The Power of Phase III

For small businesses that have successfully navigated Phase I and II, Phase III represents the 'holy grail' of federal contracting. Pursuant to the SBIR/STTR Policy Directive, Phase III awards are not subject to the same competition requirements as standard procurements. Because the initial Phase I and II awards were competitively selected, the competition requirement is satisfied for any subsequent Phase III work related to that technology.

Strategic Advantages

Phase III status provides specific, high-value flexibilities that capture managers should leverage:

  • Sole-Source Authority: Agencies can award contracts directly to the SBIR awardee without a Justification and Approval (J&A) for other than full and open competition, provided the work relates to the developed technology.
  • Size Standard Exemption: Phase III awards are generally exempt from SBA size standards, allowing firms to continue work even if they have outgrown their small business status.
  • No Dollar Limits: There are no statutory limits on the dollar size or duration of a Phase III contract.

Navigating the Procurement Process

Despite these authorities, many contracting officers (COs) are hesitant to invoke them due to a lack of familiarity. Practitioners must be prepared to educate the government on the legal framework:

| Regulatory Reference | Authority | |---|---| | 15 U.S.C. §638 | The foundational SBIR/STTR Statute. | | FAR 6.302-5 | Authorized use of other than full and open competition. | | NMCARS Annex 13 | Template for Phase III sole-source justifications. |

Practitioner Guidance

To successfully secure a Phase III award, you must ensure that the Statement of Work (SOW) clearly links the new requirement to the technology developed in the earlier phases. Use the SBIR.gov tutorials to build your internal knowledge base. When engaging with program offices, provide them with the specific policy directives that authorize the sole-source path. This reduces the administrative burden on the CO and accelerates the procurement timeline, turning a potential multi-year competition into a streamlined award process.

The GovCon Architect editorial team writes practitioner guidance on federal capture, compliance, and proposal operations. GovCon Architect is an AI-powered federal government contracting platform for opportunity intelligence, capture, compliance, competitive intelligence, and proposal workflows.

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