Size Protest — SBA Size Protest
Also known as: Small business size protest, size status protest
At a Glance
- Where you file
- With the contracting officer, who forwards it to the SBA Area Office serving the awardee
- Who decides
- The SBA Government Contracting Area Office issues a formal size determination
- Deadline to file
- Within 5 business days after the CO notifies you of the apparent successful offeror (negotiated); by close of the 5th business day after bid opening (sealed bid)
- Automatic stay?
- No; the CO may withhold award pending the size determination or award and later terminate if the awardee is found other-than-small
- Relief available
- A binding size determination; an other-than-small firm is ineligible for the award
- Cost
- No filing fee
What It Is
A size protest challenges whether the apparent successful offeror on a set-aside or small-business reserved procurement really is a small business under the size standard assigned to the solicitation's NAICS code. It is governed by SBA's regulations at 13 CFR §§ 121.1001–121.1009. An interested party — generally another offeror the contracting officer has not eliminated from the competition — or the contracting officer or SBA itself can protest the awardee's size. The protest is filed with the contracting officer, who forwards it to the SBA Government Contracting Area Office responsible for the awardee's location. The Area Office investigates affiliation, receipts, and employee counts and issues a formal size determination. Because SDVOSB set-asides are also small-business set-asides, a size protest is a common companion to — or alternative to — a status protest: even a properly certified SDVOSB loses the award if it turns out to exceed the size standard, often because of affiliation with a larger firm.
When to Use It
- When you believe the apparent awardee exceeds the NAICS size standard on its own — its receipts or employee count are too high.
- When you suspect affiliation — common ownership, a controlling relationship, or an ostensible-subcontractor arrangement — pushes the awardee over the size standard.
- When a joint venture's combined size, or a mentor-protégé arrangement, is being misapplied to claim small status.
Key Features
| Feature | What It Means |
|---|---|
| Five-business-day filing clock | In a negotiated procurement you must file within 5 business days after the CO tells you who the apparent successful offeror is; in sealed bidding, by close of business on the 5th business day after bid opening. Late protests are dismissed as untimely. |
| Filed with the CO, decided by SBA | You file the protest with the contracting officer, who forwards it to the SBA Area Office. SBA — not the agency or the GAO — determines size. |
| Affiliation is the usual battleground | SBA aggregates the receipts and employees of affiliated concerns; most size protests turn on whether the awardee is affiliated with a larger company through ownership, control, or an ostensible-subcontractor relationship. |
| Specific allegations required | A size protest must be specific and based on evidence — a bare assertion that the awardee 'is too big' will be dismissed as non-specific. |
| Appealable to SBA OHA | An adverse size determination can be appealed to SBA's Office of Hearings and Appeals within 15 days of receiving it. |
What It Means for an SDVOSB
Size is measured at the same time as SDVOSB status — generally as of the date the concern certifies as part of its initial offer including price — so an SDVOSB that has grown, or that teams with a large subcontractor, can win a set-aside and then lose it to a size protest. The most common trap for veteran-owned firms is affiliation and the ostensible-subcontractor rule: if the SDVOSB relies so heavily on a large subcontractor that the sub is effectively performing the primary and vital work, SBA can find them affiliated and the SDVOSB other-than-small. Running the size standard for the solicitation's NAICS code before you bid, and structuring any teaming or joint venture to preserve small status, is the best defense — and the same math lets you protest a competitor you believe has outgrown the standard.
How to File
- Confirm you are an interested party — an offeror the CO has not eliminated from the competition — and identify the NAICS code and size standard assigned to the solicitation.
- Gather specific evidence of the basis: receipts or employee data, common ownership or control, joint-venture composition, or an ostensible-subcontractor relationship.
- File the written protest with the contracting officer within 5 business days of being notified of the apparent successful offeror (or by close of the 5th business day after bid opening in sealed bidding).
- The CO forwards the protest to the SBA Area Office, which requests the challenged firm's SBA Form 355 and records and issues a size determination.
- If the determination goes against you, appeal to SBA's Office of Hearings and Appeals within 15 days of receiving it.
Common Pitfalls
- Missing the 5-business-day window — size protests are strictly timed and late filings are dismissed.
- Filing a non-specific protest — SBA dismisses protests that merely assert the awardee is large without concrete allegations.
- Confusing size with SDVOSB status — a size protest tests whether the firm is small; whether it is a veteran-owned, SBA-certified SDVOSB is a separate status protest.
- Overlooking affiliation and the ostensible-subcontractor rule when structuring your own team, then losing your award to a competitor's size protest.
Run the Numbers
Frequently Asked
What is an SBA size protest?
It is a challenge to whether the apparent awardee of a small-business or SDVOSB set-aside actually qualifies as small under the size standard assigned to the solicitation's NAICS code. Governed by 13 CFR §§ 121.1001–121.1009, the protest is filed with the contracting officer, who forwards it to the SBA Area Office. SBA investigates receipts, employee counts, and affiliation and issues a binding size determination; a firm found other-than-small is ineligible for the award.
What is the deadline to file a size protest?
In a negotiated procurement, an interested party must file the size protest with the contracting officer within 5 business days after the CO notifies it of the identity of the apparent successful offeror. In sealed bidding, the deadline is the close of business on the 5th business day after bid opening. The contracting officer and SBA can raise a size protest at any time. Late protests are dismissed as untimely.
What is the difference between a size protest and an SDVOSB status protest?
A size protest challenges whether the awardee is small under the NAICS size standard — a question of receipts, employees, and affiliation decided by the SBA Area Office. An SDVOSB status protest challenges whether the awardee is an eligible service-disabled veteran-owned small business — a question of veteran status, ownership, and control decided under 13 CFR Part 134, Subpart J. A firm can be small but not a valid SDVOSB, or a valid SDVOSB that has outgrown the size standard, so the two protests test different things and can be filed together.
Primary Sources
- 13 CFR § 121.1001 — Who may initiate a size protest?
- 13 CFR § 121.1004 — What time limits apply to size protests?
- FAR 19.302 — Protesting a small business representation
Plain-English reference, not legal advice. Protest and dispute deadlines are short and strictly enforced, the choice of forum can waive other rights, and the governing statutes, FAR, and 13 CFR rules are periodically amended — always confirm the current deadline and procedure for your specific situation, read the actual solicitation and contract, and consult qualified counsel before relying on this.
Change log (1)
- LaunchedPublished the federal bid protest & contract dispute forums reference covering where and how an SDVOSB challenges a procurement or resolves a dispute — the agency-level protest (FAR 33.103), the GAO bid protest and CICA automatic stay (31 U.S.C. §§ 3551–3557 / 4 CFR Part 21), the Court of Federal Claims protest (28 U.S.C. § 1491(b)), the SBA size protest (13 CFR §§ 121.1001–121.1009), the SDVOSB status protest (13 CFR Part 134, Subpart J), the NAICS code appeal (13 CFR § 121.1103), SBA's Office of Hearings and Appeals (13 CFR Part 134), the Contract Disputes Act claim (41 U.S.C. §§ 7101–7109), the ASBCA/CBCA boards of contract appeals (41 U.S.C. § 7105), and the Court of Federal Claims contract claim (28 U.S.C. § 1491(a)) — each with an at-a-glance quick-facts card, a key-features table, a how-to-file checklist, common pitfalls, an SDVOSB-specific angle, FAQPage, Article, Dataset, and BreadcrumbList structured data, primary-source citations, and cross-links into the glossary, regulation explainers, compliance deadlines, how-to guides, FAQ, and the set-aside eligibility, size-standard, win-probability, and price-to-win calculators.