Affiliation
Also known as: SBA affiliation, size affiliation
What you do here: Keep control genuinely separate so another firm's size isn't added to yours
At a Glance
- Who it's for
- Any firm claiming small size — affiliation is tested at the time of offer
- What it does
- Adds affiliated firms' receipts/employees to yours to determine size
- Governing authority
- 13 CFR § 121.103 (general principles of affiliation)
- Core test
- Control or the power to control — whether or not it is exercised
- Key exemptions
- Approved mentor-protégé JVs and qualifying small-business JVs for a set-aside
What It Is
Affiliation is the SBA's rule for deciding when two or more firms are treated as one for size purposes. Under 13 CFR § 121.103, firms are affiliated when one controls or has the power to control the other, or a third party controls or can control both — and it is the *power* to control that matters, whether or not it is actually exercised. When firms are affiliated, the SBA adds their receipts (or employees) together to determine size, so a firm that is small on its own can be found large — and lose a set-aside — because of its affiliates. The SBA finds affiliation on many bases: ownership and stock control, common management, an 'identity of interest' between close relatives or economically dependent firms, the newly-organized-concern rule (a former employee's firm backed by the old employer), and the ostensible subcontractor rule (a joint-venture-like reliance on a subcontractor). Because affiliation is assessed as of the date of the offer, it is decided in size protests before the SBA Area Office and the Office of Hearings and Appeals. Two important exemptions protect legitimate teaming: an SBA-approved mentor-protégé joint venture, and a qualifying joint venture of small businesses for a specific set-aside, are not affiliated based on those relationships.
When You Use It
- Whenever a firm certifies it is small — affiliation is the test behind that certification.
- In a size protest, where a competitor argues the awardee is affiliated with a larger firm.
- When structuring ownership, management, joint ventures, or subcontracts to avoid unintended affiliation.
- When a firm shares owners, family, facilities, or heavy economic dependence with another company.
Key Features
| Feature | What It Means |
|---|---|
| Power to control | Affiliation turns on control or the power to control — negative control (e.g., a minority owner's veto rights) can be enough even without day-to-day control. |
| Multiple bases | Ownership, common management, identity of interest (family or economic dependence), the newly-organized-concern rule, and the ostensible subcontractor rule can each create affiliation. |
| Receipts/employees combined | Once affiliated, firms' average annual receipts (or employees) are added together to test size against the NAICS standard. |
| Measured at offer | Size and affiliation are generally determined as of the date of the initial offer including price — you can't cure it afterward. |
| Teaming exemptions | An SBA-approved mentor-protégé JV and a qualifying small-business JV for a specific set-aside are exempt from affiliation based on those relationships. |
The SDVOSB Angle
Affiliation is the quiet disqualifier. An SDVOSB can be perfectly veteran-owned and controlled and still lose a set-aside because the SBA combined its size with an affiliate's — a family member's company, a firm it's economically dependent on, or a subcontractor it over-relied on. Before you certify small, map every relationship that could create control or the power to control, and use the blessed structures (an approved mentor-protégé JV, or a qualifying small-business JV) when you need to team with a bigger firm. When you subcontract, keep the prime genuinely in control to avoid ostensible-subcontractor affiliation.
How to Set It Up
- Inventory every firm you share ownership, management, family ties, or economic dependence with.
- Check for negative control — veto rights or supermajority provisions that give a minority owner the power to control.
- Confirm you are small counting all affiliates' receipts/employees under the contract's NAICS size standard.
- Use an SBA-approved mentor-protégé JV or a qualifying small-business JV to team without affiliation.
- Keep the SDVOSB genuinely in control of any subcontract to avoid the ostensible subcontractor rule.
Watch Out For
- It's the *power* to control that counts — an unexercised veto or option can still create affiliation.
- Identity of interest can affiliate firms owned by close family members or that are economically dependent on one another.
- The newly-organized-concern rule can affiliate a spin-off with the former employer that backs it.
- Affiliation is tested at the time of offer — restructuring after a size protest is filed comes too late.
Run the Numbers
Frequently Asked
What is affiliation in SBA size determinations?
Affiliation is the SBA rule (13 CFR § 121.103) that combines the size of firms that control, or have the power to control, one another. When firms are affiliated, their average annual receipts or employees are added together to determine whether the concern is small under the applicable NAICS size standard. Because of affiliation, a firm that looks small by itself can be found too large for a set-aside.
What creates affiliation between two companies?
Common bases include ownership or stock control, common management or directors, an 'identity of interest' between close family members or economically dependent firms, the newly-organized-concern rule (a former employee's firm backed by the old employer), and the ostensible subcontractor rule (unusual reliance on a subcontractor). The key test is control or the power to control — whether or not that power is actually exercised.
Can I joint venture with a larger firm without becoming affiliated?
Yes, through the exemptions. An SBA-approved mentor-protégé joint venture is exempt from affiliation even though the mentor is large, and a qualifying joint venture of small businesses for a specific set-aside is not affiliated based on that JV relationship. Outside those blessed structures, teaming with a larger firm — especially over-relying on it as a subcontractor — risks an affiliation finding that combines your sizes and disqualifies you.
Primary Sources
- 13 CFR § 121.103 — How does SBA determine affiliation?
- 13 CFR Part 121 — Small Business Size Regulations
Plain-English reference, not legal advice. Teaming, joint-venture, affiliation, and subcontracting rules are fact-specific and the SBA regulations and FAR are amended from time to time — always read the current 13 CFR and FAR text, confirm the requirements with the contracting officer and your SBA resources, and consult qualified counsel before structuring a joint venture, teaming agreement, or subcontract you intend to rely on.
Change log (1)
- LaunchedPublished the federal teaming, joint venture & subcontracting arrangements reference covering how an SDVOSB works with other firms on a set-aside — the prime contractor and subcontractor roles, the FAR Subpart 9.6 contractor team arrangement (teaming agreement), the SDVOSB joint venture (13 CFR § 128.402), the SBA mentor-protégé joint venture (13 CFR § 125.9), the similarly situated entity that counts a sub's work as self-performance (13 CFR § 125.6), the ostensible subcontractor rule (13 CFR § 121.103(h)), general affiliation (13 CFR § 121.103), the small business subcontracting plan (FAR Subpart 19.7 / 52.219-9), and flow-down clauses (FAR 52.212-5 / Subpart 44.2) — each with an at-a-glance quick-facts card, a when-you-use-it list, a key-features table, an SDVOSB-specific angle, a how-to-set-it-up checklist, watch-outs, FAQPage, Article, Dataset, and BreadcrumbList structured data, primary-source citations, and cross-links into the glossary, regulation explainers, how-to guides, set-aside comparisons, FAQ, clauses, forms, and the limitations-on-subcontracting, subcontracting-goal, set-aside eligibility, and size-standard calculators.