Sole Source Justification Letter

A sole source justification letter is a document prepared by a contractor or government program office that explains why only one source is capable of fulfilling a specific requirement, supporting the contracting officer's Justification and Approval (J&A) for a non-competitive award under FAR 6.302.

What is a Sole Source Justification Letter?

When a government agency determines that competition is not practicable and awards a contract to a single source without a competitive solicitation, FAR 6.303 requires the contracting officer to prepare a Justification and Approval (J&A) document. The J&A must identify the specific exception to the competition requirement (FAR 6.302 lists seven: only one responsible source, unusual and compelling urgency, industrial mobilization, international agreement, authorized by statute, national security, and public interest) and explain why the exception applies.

A contractor-prepared sole source justification letter is distinct from the government's J&A but often informs it. When a contractor seeks a sole-source award, such as after an unsolicited proposal, for a sole-source spare part, or for a follow-on development effort on a proprietary system, the contracting officer may ask the contractor to prepare a justification letter explaining its unique qualifications. This letter documents why no other source could perform the work, including the contractor's unique technical data, proprietary manufacturing processes, specialized facilities, or exclusive rights to information required for performance.

An effective sole source justification letter includes: a specific description of the unique capability or data that only the contractor possesses, an explanation of why that capability cannot be replicated by competitors, documentation that the contractor has independently developed or otherwise exclusively holds the relevant rights, and an explanation of why the government requirement cannot be reformulated to permit competition.

Why sole source justification letters matter for government contractors

For contractors seeking sole-source awards, the quality of the justification letter directly affects whether the contracting officer can approve a non-competitive action. A vague or unsupported letter will be rejected in favor of requiring competition. A well-documented letter that precisely articulates the unique capability basis creates a defensible record that survives both GAO protests and OIG scrutiny.

Example

An electronics manufacturer is the only company that developed and holds trade secret manufacturing data for a military-grade crystal oscillator used in a DoD communications system. The manufacturer prepares a sole source justification letter documenting: (1) the specific proprietary process parameters that no other firm has access to, (2) that the government does not own the technical data for the manufacturing process, (3) that attempting to develop a second source would require two to three years and $5M in technical data development that the government does not have funds or time for, and (4) the criticality of the component to the communications system. The contracting officer uses this letter to support a J&A for a sole-source spare parts contract.

Frequently Asked Questions

Who reviews a J&A based on a sole source justification letter?

J&A approval authority depends on the contract value. J&As for contracts up to $700K may be approved by the contracting officer. Contracts between $700K and $13.5M require one approval level above the CO. Contracts above $13.5M require the head of the contracting activity. Contracts above $75M require senior procurement executive approval. All J&As are published on SAM.gov after award, enabling public and competitor review.

Can a competitor protest a sole source award?

Yes. An interested party can protest a sole-source award to GAO, the Court of Federal Claims, or the agency itself. Successful protests often demonstrate that the government's determination of uniqueness was not supported by adequate market research, that other sources exist who could provide equivalent capability, or that the J&A relied on factually incorrect assertions in the contractor's justification letter.

What is the difference between a J&A and a sole source determination?

The J&A (Justification and Approval) is the formal government document that justifies the non-competitive award and obtains the required approval. The sole source determination is the finding within the J&A that supports the particular FAR 6.302 exception. A contractor's justification letter provides factual support for the J&A but is not itself the J&A.

Can a contractor approach the government to request sole source consideration for its products?

Yes. Contractors frequently present capabilities to government program offices and argue that their solution is uniquely suited to an agency's needs. However, the determination of whether sole-source procurement is appropriate belongs to the contracting officer and must be supported by fact, not contractor advocacy alone. Market research must affirmatively confirm that no other source can satisfy the requirement.