Size Protest (SP)
A Size Protest (SP) is a formal challenge filed against the small business status of an offeror or awardee on a federal procurement reserved for small businesses, adjudicated by the SBA under FAR 19.302 and 13 CFR 121.
What Is a Size Protest?
A Size Protest, often abbreviated SP, is a written objection asserting that a specific offeror does not qualify as a small business under the size standard assigned to a particular federal solicitation. The challenge must identify the protested firm, the solicitation, the assigned NAICS Code, and the specific basis for believing the offeror is not small.
Size protests apply only to procurements set aside for small businesses or to small business subcontracting plan compliance, not to full and open competitions. The SBA Area Office reviews the protested firm's revenues, employee counts, affiliations, and ownership against the applicable size standard.
The result is a formal size determination that either sustains the protest (the firm is other than small) or dismisses it (the firm is small). The contracting officer is bound by that determination for the procurement in question.
The size protest process exists because small business set-asides are valuable, and the integrity of those programs depends on ensuring that only eligible firms compete.
Key Characteristics
Size protests have several defining attributes. They are filed in writing, with specific factual allegations, against a specific firm on a specific solicitation.
They are time-sensitive: under FAR 19.302(d), interested parties must file within five business days of receiving notice of the apparent successful offeror. They are jurisdictional: only the SBA Area Office can issue size determinations, and the contracting officer must hold the award pending the determination.
They are evidence-based: protests must include factual support, not speculation, and the SBA Area Office may request additional documentation from both the protester and the protested firm. They are appealable: an adverse determination can be appealed to the SBA Office of Hearings and Appeals within fifteen business days. Each of these characteristics shapes how a contractor responds when it is protested and how a competitor decides whether to file.
How It Works in Government Contracting
Size protests run through a defined sequence. First, the contracting officer notifies offerors of the apparent successful offeror, which starts the five business day filing clock for interested parties.
Second, the protester files the protest with the contracting officer, who forwards it to the SBA Area Office for the protested firm's headquarters. Third, the SBA Area Office reviews the protest for adequate specificity.
Insufficiently specific protests are dismissed without a substantive determination. Fourth, the SBA Area Office sends the protested firm a Form 355 request, which the firm must complete with revenue, employee, ownership, and affiliation data.
Fifth, the SBA Area Office issues a size determination, typically within fifteen business days. Sixth, either party may appeal to the SBA Office of Hearings and Appeals.
Throughout the process, the contracting officer holds the award. A sustained protest removes the firm from eligibility and requires the contracting officer to make a new award decision.
Real-World Example
A federal agency issues a small business set-aside solicitation under NAICS 541512 (Computer Systems Design Services), with the $34 million five-year average revenue size standard. Four offerors submit proposals; the agency announces an apparent successful offeror.
Within five business days, a competing offeror files a size protest with the contracting officer, alleging that the apparent successful offeror has more than $34 million in five-year average revenue and is affiliated with a non-small parent. The contracting officer forwards the protest to the SBA Area Office.
The SBA Area Office sends the protested firm an SBA Form 355 request. The firm provides five years of revenue, ownership records, and affiliation documentation.
The SBA Area Office reviews the submission and issues a size determination twelve business days later. In this case, the SBA determines that the firm exceeds the size standard when affiliation is properly counted.
The agency rescinds the apparent award, the contracting officer evaluates the remaining eligible offerors, and the contract is awarded to the next eligible firm. The protested firm appeals to the SBA Office of Hearings and Appeals; the appeal is pending.
Regulatory Framework
Size protests are governed by FAR 19.302 (procedural rules), 13 CFR Part 121 (substantive size standards and affiliation rules), and 13 CFR 134 (appeals procedure). FAR 19.302 sets the filing deadlines and the requirements for protest specificity.
13 CFR 121 establishes how revenue is calculated (five year average for revenue-based standards under the Small Business Runway Extension Act of 2018), how employees are counted, and how affiliation is determined. 13 CFR 134 governs SBA Office of Hearings and Appeals proceedings.
Size protests under set-asides differ from bid protests, which are filed with the agency or the Government Accountability Office and address evaluation or procedural challenges, and from ostensible subcontractor allegations, which the SBA reviews under affiliation rules. A protest can be filed by an interested party, the contracting officer, or the SBA itself; each filing pathway uses the same SBA Area Office adjudication process.
Why It Matters for Contractors
Size protests determine which firms hold federal set-aside awards and which do not. An adverse size determination removes the protested firm from eligibility on the contract at issue.
A protest that is sustained can transfer the award to a competitor; a protest that is dismissed confirms eligibility and removes a future cloud. Contractors operating in set-aside programs need to maintain rigorous size and affiliation records to defend against protests, and they need to monitor competitors' apparent awards to file timely protests when warranted.
Protests interact with past performance, because an adverse determination on a current contract can affect a firm's CPARS record and bidder credibility. They also interact with joint ventures and the SBA Mentor-Protege Program, where affiliation analysis is more complex. The contractors that handle size protests best treat them as a contracting compliance discipline, not a one-time event.
Common Misconceptions
Anyone can file a size protest.
No. Only interested parties (offerors on the procurement), the contracting officer, or the SBA itself can file. Third parties without standing are dismissed.
Size is determined when the firm registers in SAM.gov, and that registration governs all bids.
No. Size is determined on a procurement-by-procurement basis using the NAICS Code assigned to that solicitation and the firm's status as of the date of self-certification on that bid.
A sustained size protest is final.
No. Either party can appeal to the SBA Office of Hearings and Appeals within fifteen business days. The appeal can affirm, reverse, or remand the original size determination.
Frequently Asked Questions
What is the deadline for filing a size protest?
Under FAR 19.302(d), interested parties must file within five business days of receiving notice of the apparent successful offeror. The contracting officer or SBA can file at any time before award.
What information must a size protest include?
The protest must identify the protested firm, the solicitation, the assigned NAICS Code, and the specific factual basis for believing the firm is not small under that size standard. Conclusory or speculative protests are dismissed.
Can a size determination be appealed?
Yes. Either party can appeal to the SBA Office of Hearings and Appeals within fifteen business days. OHA reviews the size determination de novo on the record.
Does the contracting officer have to hold the award during a size protest?
Yes, in most circumstances. FAR 19.302(h) requires the contracting officer to suspend award pending the SBA size determination unless urgent and compelling circumstances justify proceeding.
Related Government Contracting Topics
Bid Protest: Formal challenge to a federal contract award or solicitation, distinct from a size protest and filed with the agency, GAO, or Court of Federal Claims.
NAICS Code: Six-digit industry classification code that determines the applicable small business size standard for a procurement.
Set-Aside: Federal procurement reserved for businesses meeting eligibility criteria such as small business, 8(a), HUBZone, WOSB, or SDVOSB status.
Joint Venture: Formal business arrangement that can affect size and affiliation for federal contracting purposes.
Past Performance: Documented track record on prior contracts; affected by sustained size protests that result in award loss.
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