Ostensible Subcontractor Red Flags in Teaming Agreements

The ostensible subcontractor rule sits at 13 CFR 121.103(h), inside the Small Business Administration’s broader affiliation regulation. It asks a narrow question with a wide consequence: is the subcontractor performing the primary and vital requirements of the contract, or is the prime unusually reliant on the subcontractor for management, financing, or technical capacity that the prime does not otherwise have. If the answer is yes, the SBA treats the prime and the subcontractor as joint venturers for size purposes. Their revenues or employee counts are added together, and the combined size often exceeds the set-aside threshold, which means the award was never eligible in the first place.

There is no single disqualifying clause. The SBA and the Office of Hearings and Appeals apply a totality of the circumstances test, weighing what the agreement says against what the parties actually plan to do. Over time that analysis has settled around four factors that recur in nearly every decision: which party performs the primary and vital contract requirements, which party furnishes the management and key personnel, which party carries the technical experience the solicitation demands, and which party is financing the work. No one factor controls, and a teaming agreement can fail on any single factor if it is lopsided enough. A 2023 SBA rule change added a further tie: for service and specialty trade contracts, the ostensible subcontractor analysis is now read alongside the prime’s compliance with the limitations on subcontracting at 13 CFR 125.6. An agreement that would leave the prime short of its self-performance floor tends to fail both tests for the same underlying reason, because the work share driving the shortfall is usually the same work share driving the affiliation finding.

None of this shows up as a single flagged clause that a reviewer can circle in red. It shows up as a pattern across several ordinary-looking provisions: the scope section, the personnel section, the past performance section, the financing section. Read individually, each one can look like a reasonable teaming decision. Read together, they describe who is actually going to run the contract, and that is the question a size protest asks.

1. The incumbent workforce transfers to the subcontractor, not the prime

What it looks like on the page: a staffing or transition section that names the incumbent contract, states that the subcontractor will make offers to the departing incumbent’s employees, and puts the retention target and the transition timeline entirely in the subcontractor’s section of the agreement. The prime appears in that section only as the party being kept informed.

The fix: if workforce continuity is genuinely a joint effort, the agreement should say so, with the prime employing at least a meaningful share of the transferring staff directly, or with the prime carrying its own, separately staffed portion of the workforce. A transition plan where every incumbent hire reports through the subcontractor is a transition plan where the subcontractor is performing the work.

2. Key personnel and program management come from the subcontractor

What it looks like on the page: the proposed program manager, the technical lead, or the named key personnel in the resumes exhibit all carry the subcontractor’s letterhead. The prime’s only named role is a contracts or compliance point of contact who does not appear in the technical volume.

The fix: the prime should hold at least one substantive key personnel role, ideally the program manager position that the solicitation treats as accountable for performance, and that person should be a prime employee, not a subcontractor employee wearing a prime badge for the proposal. If the prime cannot staff that role today, that is worth knowing before the proposal is due, not after the protest is filed.

3. The subcontractor is financing the proposal or the bonding

What it looks like on the page: a cost-sharing or financing exhibit where the subcontractor covers proposal preparation costs, mobilization costs, or the bonding capacity the prime cannot obtain on its own, without a corresponding reimbursement term that runs back to the subcontractor on ordinary commercial terms.

The fix: financing the pursuit is not automatically disqualifying, but financing that only flows one direction, with no interest, no security, and no defined repayment schedule, reads as the subcontractor carrying the prime rather than teaming with it. Put commercial terms on any advance, and keep the prime’s own contribution to the bid, however modest, visible in the same exhibit.

4. The prime has no relevant past performance of its own

What it looks like on the page: the past performance volume cites the subcontractor’s contracts almost exclusively, and the prime’s corporate capability statement, attached as an exhibit, lists work in an unrelated line of business or no relevant federal work at all.

The fix: this is often the clearest signal available before a protest is ever filed, because it is visible in the proposal itself, not just the teaming agreement. A prime relying entirely on a subcontractor’s past performance to qualify for the solicitation is a prime that a reviewer will conclude lacks the technical experience the four-factor test asks about. Build a past performance record in the relevant scope before pursuing a set-aside that depends on someone else’s.

5. The work share promised to the subcontractor is disproportionate

What it looks like on the page: a work share table, or the absence of one, where the percentages either are not stated or, when totaled against the labor categories in the pricing volume, put the subcontractor well past the self-performance floor the prime is required to hold under FAR 52.219-14 and 13 CFR 125.6.

The fix: build the work share table from the labor categories in the pricing volume, not from a round number picked in negotiation, and check the total against the applicable self-performance percentage for the contract type before the agreement is signed. If the subcontractor’s share only works on paper because the prime contributes categories it does not actually staff, the arithmetic will not survive a protest either.

6. The subcontractor controls hiring, pricing, or schedule decisions

What it looks like on the page: an approval or consent clause buried in the governance section, giving the subcontractor sign-off rights over the prime’s hiring decisions on the contract, over labor rates and pricing changes, or over the performance schedule, in each case rights that run only in the subcontractor’s favor.

The fix: governance and consent rights on a teaming agreement should be mutual and limited to matters that affect both parties’ interests, such as changes to the overall work share or termination of the teaming relationship. A one-way consent right over the prime’s internal management of its own contract is a control right, and control is exactly what the ostensible subcontractor rule measures.

7. The subcontractor is the real incumbent under a new prime’s name

What it looks like on the page: the subcontractor performed this exact scope on the predecessor contract, whether as the prior awardee, a prior subcontractor, or under a different set-aside category, and the current teaming agreement changes only the name on the cover page while the subcontractor’s systems, processes, and deliverables carry forward unchanged.

The fix: this pattern is common and not automatically disqualifying, since experienced subcontractors often do sit across several incumbencies. What matters is whether the new prime is doing anything the prior awardee was not, in management, in staffing, in technical ownership. If the honest answer is that nothing changed except the entity named on the award, expect a size protest to reach the same conclusion.

8. The prime depends on the subcontractor’s facilities or systems

What it looks like on the page: the technical volume describes performance out of the subcontractor’s facility, on the subcontractor’s certified systems, such as an accounting system, a quality management certification, or a security accreditation the prime does not hold, with no plan for the prime to obtain or co-locate any of it.

The fix: where the prime genuinely lacks a facility or a certification the contract requires, the agreement should describe a path for the prime to acquire it, or should limit the subcontractor’s role to a bounded scope that does not require running the entire contract through infrastructure only the subcontractor owns. A prime that cannot perform the contract without the subcontractor’s building and the subcontractor’s systems is, for size purposes, not really the prime.

What a size protest actually looks at

A competitor who loses a set-aside award has only a short window after notice, five business days in most negotiated procurements, to file a size protest with the contracting officer, who forwards it to the SBA Area Office for a formal size determination. The Area Office does not take the teaming agreement’s characterization of the relationship at face value. It requests the proposal, the subcontract, the resumes of key personnel, and often a questionnaire answered separately by the prime and the subcontractor, and it compares what those documents say against the four factors above. Findings on unfavorable facts, silence on a required point, or inconsistency between the prime’s and the subcontractor’s answers tend to resolve against the prime, because the prime is the party whose size status is being tested. A determination against the prime can be appealed to the SBA Office of Hearings and Appeals, but the award itself is often already in question by the time that process concludes, and the protest record is built from documents the parties wrote months earlier, when the incentive was to win the pursuit rather than to withstand a protest.

The practical implication is that a teaming agreement should be drafted, and read, as if it will be produced in a size protest, because for a meaningful share of set-aside awards it eventually is.

We also cover the broader review of a teaming agreement, work share commitments, flow-downs, and payment terms among them, in our teaming agreement review checklist. The affiliation risk described there is the same rule examined here in more detail.