Not every small business needs to start as a prime contractor. Subcontracting to a company that already holds a federal contract can build experience, cash flow and relationships with far less proposal effort. This guide explains how federal subcontracting works and how to find primes who need what you do.
Prime versus subcontractor
As SBA explains on its prime and subcontracting page, prime contractors work directly with the government and are responsible for completing the work as defined in the contract. Subcontractors do not work directly with the government; they work for other contractors. That lets businesses that are not ready to contract directly with an agency still take part in federal work.
As a subcontractor, your contract is with the prime. Your payment terms, scope and obligations come from that subcontract — though many federal clauses "flow down" from the prime contract and will appear in it.
Why primes look for small businesses
Subcontracting plans
Federal contracts awarded to other-than-small businesses above a certain dollar threshold must include a small business subcontracting plan following FAR 52.219-9 (see FAR subpart 19.7). In that plan, the prime sets goals for subcontracting to small businesses, small disadvantaged businesses, women-owned, HUBZone, veteran-owned and service-disabled veteran-owned small businesses. Primes report against those goals, so they have a real reason to find capable small subcontractors.
Capability gaps
Large primes often need local presence, specialty skills or niche products they do not have in-house. A small firm that fills a specific gap reliably is valuable.
Set-aside teaming
Small primes on set-aside contracts may also subcontract to other small businesses. If you share the prime's program status (for example, both HUBZone-certified), you may be "similarly situated," which matters under the limitations on subcontracting.
Where to find prime contractors
- SBA SubNet. Large businesses can post subcontracting opportunities to SubNet, SBA's subcontracting database, and small businesses can search and view them.
- SBA's directory of prime contractors with subcontracting plans. SBA links to a directory of federal prime contractors that have subcontracting plans, along with their small business liaison contacts, from its prime and subcontracting page.
- Agency subcontracting directories. Several agencies maintain lists of large primes and their small business liaisons.
- Award data. Use USAspending.gov or PinPeek's NAICS pages to see who is winning large awards in your industry, then look for their supplier or small business programs.
- Award notices and interested vendor lists on SAM.gov. Some solicitations let companies list themselves as interested vendors, which shows you who may be bidding as a prime.
- Industry days and matchmaking events, often hosted by agencies, APEX Accelerators and industry groups.
Make yourself findable
SBA notes that primes use the Small Business Search (SBS, formerly the Dynamic Small Business Search) to find small businesses. Make sure your profile there is complete: socioeconomic representations and certifications, a clear capabilities narrative, keywords, NAICS codes and performance history. Keep your SAM.gov registration accurate too.
How to approach a prime
- Find the right contact. Large primes usually have a small business liaison officer or supplier diversity office. Start there.
- Be specific. Name the contract or agency you can support, the exact service you would provide and where. "We provide licensed HVAC preventive maintenance at federal facilities in your contract's region" beats "we do facilities work."
- Send a tight capability statement. One page, with your NAICS codes, certifications, UEI and CAGE code, and relevant work. See how to write a capability statement.
- Register in the prime's supplier portal if it has one.
- Follow up before solicitations, not after. Primes build teams early. Use forecasts and presolicitation notices to approach them while they are still assembling a bid.
Protect yourself in the subcontract
- Read the flow-down clauses. Clauses on labor standards, cybersecurity, and other requirements may apply to you.
- Understand payment terms. When the prime gets paid and when you get paid are separate questions. Agree terms in writing.
- Clarify scope and workshare. If you are named in the prime's proposal, a teaming agreement should say what work you will receive if the prime wins.
- Get credit for past performance. Ask the prime if you can use the work as a reference, and keep your own records of what you delivered.
What primes look for in a subcontractor
Large primes evaluate subcontractors much as the government evaluates primes. Expect questions about your relevant experience, staffing depth, insurance, safety record, financial stability and ability to meet the flow-down clauses. Some will ask you to register in their supplier portal and complete a questionnaire before they will discuss a specific opportunity. Having your capability statement, certificates of insurance and a short list of references ready shortens that process and signals that you are easy to work with.
Frequently asked questions
Do I need to be registered in SAM.gov to be a subcontractor?
Often not for a full registration, though primes commonly ask for a Unique Entity ID, and some flow-down requirements or reporting may require one. Check what the prime and the contract require.
What is SubNet?
SBA's subcontracting network, where large businesses can post subcontracting opportunities and small businesses can search them.
Why would a large company want to subcontract to me?
Many large primes have small business subcontracting plans with goals they report against, and they often need specialized or local capabilities they do not have in-house.
Does subcontract work count as past performance?
It can, depending on the solicitation. Many solicitations accept relevant subcontract experience. Keep records and a reference contact at the prime.
This guide is general information, not legal advice. Rules change — always check the solicitation and the official sources linked here.