If you award or manage a small business set-aside as a prime, there's a clause that quietly governs how much of the work can leave your house. It's the limitations on subcontracting rule, and it's the difference between a clean set-aside and a contract that gets challenged as a pass-through.
The rule exists for one reason. A set-aside is supposed to put real work in the hands of the small business that won it, not let that business collect a fee and route the actual performance to a large company. So the government caps the share of the award you can pay out to firms that don't share your small business status. Cross the cap and you've got a compliance problem, a potential False Claims Act exposure, and in the worst cases an Office of Inspector General referral.
Here's how the math works, where the exception helps, and what a buyer or compliance lead should watch.
The clause and the percentagesThe operative language lives in two places that say the same thing. FAR 52.219-14, Limitations on Subcontracting, is the contract clause. 13 CFR 125.6, the SBA regulation, is the source it conforms to. FAR 19.505 ties them together on the acquisition side.
The caps are stated as a share of the amount the government pays you, not of your total costs, and they exclude the cost of materials:
- Services (except construction): you may not pay more than 50% of the amount the government pays you to firms that are not similarly situated.
- Supplies (other than from a nonmanufacturer): the same 50% cap, excluding the cost of materials.
- General construction: no more than 85% to non-similarly-situated firms.
- Special trade construction: no more than 75%.
A 2021 FAR rewrite shifted the test from "you must self-perform X%" to "you may not subcontract more than Y% to firms outside your status." Same idea, cleaner accounting. The reference point changed from your costs to the contract price the government pays, which is the number a contracting officer can actually verify.
One more piece many primes miss: under the nonmanufacturer rule, a small business that doesn't make the product it's supplying can still hold a set-aside, but it has to furnish the product of a domestic small business manufacturer (absent an SBA waiver). That's a separate test from the percentage cap, and it bites on supply contracts.
The similarly situated entity exceptionThis is the part that gives you room to build a real team instead of doing everything in-house.
A similarly situated entity is a first-tier subcontractor that holds the same small business program status that qualified you for the award, and that is small under the NAICS code you assign to the subcontract. On a small business set-aside, any small business qualifies. On a more specific set-aside, the subcontractor has to match: an 8(a) prime needs an 8(a) sub to get the benefit, a HUBZone prime needs a HUBZone sub, an SDVOSB prime needs an SDVOSB sub, a WOSB prime needs a WOSB sub.
When work goes to a similarly situated entity, it doesn't count against your cap. That's the whole value. You can assemble a team of qualified small businesses and the dollars you pay them are treated, for the limitation, as if you performed them yourself.
Two cautions that trip up otherwise careful teams:
- The status has to be real and current at award. If your subcontractor's certification has lapsed, or it was relying on a self-certification that no longer counts, the work flips back into the capped bucket and your math can break without anyone touching the contract.
- Lower-tier work counts against you. If a similarly situated sub turns around and subcontracts to a firm that isn't similarly situated, that further-subcontracted amount counts toward your cap. You don't get to launder the percentage by adding a tier.
Because the exception lives or dies on verified status, the practical skill here is sourcing subs whose certifications you can confirm. You can search certified small and diverse firms by status and NAICS in our supplier directory, and confirm who issued a given certification through the certifying body directory when you need to validate it.
Certification, not self-attestation, in 2026The status checks behind the similarly situated test got stricter, and this is the change most likely to catch a buyer flat-footed.
SDVOSB self-certification is gone. As of late 2024, a service-disabled veteran-owned firm has to be certified by SBA through the VetCert program (at the certify.sba.gov portal) to count toward SDVOSB goals on a contract or subcontract. A self-attested SDVOSB no longer counts. Small disadvantaged business self-certification was eliminated earlier on the same logic; 8(a) and SDB status now run through SBA certification. WOSB and EDWOSB require certification through SBA's process or an approved third party.
What this means in practice: if you're counting on a sub to be your similarly situated SDVOSB or your similarly situated SDB, verify the certification in the SBA systems, not in the vendor's email signature. The fastest way to find primes-eligible subs whose status you can stand behind is to filter on the certification itself rather than a claim.
For corporate Tier-2 programs, the same discipline applies even though your obligation is contractual rather than statutory. If your customer's report counts only certified MBE, WBE, or VBE spend, an uncertified vendor doesn't move your number. Verify against the issuing council. Our corporate program directory maps which programs recognize which certifications.
What gets reported, and whereOn the federal side, the limitation interacts with two reporting tracks, and it helps to keep them straight.
If your contract carries a subcontracting plan under FAR 52.219-9 (generally larger contracts above the small business threshold held by other-than-small primes), you report against it. The Individual Subcontracting Report (ISR) covers a single contract. The Summary Subcontract Report (SSR) rolls up an entity's or agency's subcontracting in a period. Those reports historically ran through the electronic Subcontracting Reporting System, eSRS; in early 2026 those functions moved into SAM.gov, so check the current portal before a filing deadline rather than assuming the old eSRS.gov address.
Separately, SBA's SUBNet is where primes post subcontracting opportunities and where small businesses look for them. If you're a prime trying to find qualified subs to satisfy a plan or the limitation, posting there documents your outreach.
These goals frame why the rule matters at all. Federal law sets a government-wide target of 23% of prime dollars to small businesses, with sub-goals of 5% to WOSB, 5% to small disadvantaged businesses, 5% to SDVOSB (raised from 3% by the NDAA for FY2024), and 3% to HUBZone. The limitation on subcontracting is the mechanism that keeps those dollars with the firms they're meant for.
A note on the 2025 policy shiftYou've probably seen headlines about supplier programs being rolled back. Keep the two worlds separate. The 2025 rescission of Executive Order 11246 (via EO 14173) removed the affirmative-action plan obligations that applied to federal contractors' workforces and hit voluntary corporate supplier programs hardest. It did not touch the statutory architecture: the Small Business Act, the set-aside programs, FAR 52.219-14, or 13 CFR 125.6 are all still in force. If you hold a set-aside, the limitation applies exactly as it did before. The compliance obligation is statutory, and the headlines don't change the clause in your contract.
The buyer's checklistBefore you lean on a teaming arrangement to satisfy a set-aside, run this:
- Identify the cap that applies to your contract type: 50% services and supplies, 85% general construction, 75% special trade. Measure against the price the government pays you, not your costs, and exclude materials.
- Confirm each subcontractor's status in the SBA systems, and confirm it matches the set-aside type. Same status, current certification, small under the assigned NAICS code.
- Trace lower-tier flow-downs. Work a similarly situated sub pushes to a non-similarly-situated firm counts against you.
- Document your sourcing. Keep the search records, the certification verifications, and your SUBNet postings.
- Watch certification lapses mid-performance. A status that expires during the period can quietly move work back into the capped bucket.
The cleanest way to stay inside the limitation is to build the team from firms whose status you can verify on the front end. Start by searching certified small and diverse suppliers by status and NAICS in our supplier directory, and pair it with the 8(a) program audit guide if you're sourcing inside that lane.
