Every large business that wins a big federal contract usually has to write down, in the contract itself, how much of that work it will push down to small businesses. That commitment is called a subcontracting plan, and it means primes are not doing you a favor by hiring you. They have a number to hit. Your job is finding the primes who need to hit it and putting yourself where they look.
Start with the directory of prime contractors
The SBA keeps a directory of federal government prime contractors with subcontracting plans. It lists large businesses that are required to have a plan, by agency and industry. Pull the primes that already work in your NAICS codes or your agency lane. These are not cold names. They have a standing obligation to find small businesses like yours, and most of them have a subcontracting or supplier-diversity point of contact you can email directly.
SBA's SubNet is the actual posting board
SBA's SubNet is where large businesses post subcontracting opportunities tied to specific solicitations. It is free, it is public, and almost nobody checks it regularly. That is the opening. Set a recurring reminder to search it the same way you search SAM.gov, by NAICS code and keyword, not just once when you're starting out.
Make sure primes can find you back
Subcontracting works both directions. Primes searching for small businesses use SBA's Small Business Search (formerly the Dynamic Small Business Search), which pulls straight from your SAM.gov entity profile. If your profile is thin, a prime's search never surfaces you no matter how qualified you are. Fill in every field: your socioeconomic certifications, a real capabilities narrative in plain language, the NAICS codes you actually perform under, and past performance if you have any. This is the same profile our SAM.gov readiness check walks you through, because a weak entity profile costs you subcontracting leads before you ever see a solicitation.
Work the agency Small Business Offices
Every major federal agency has an Office of Small and Disadvantaged Business Utilization, or an equivalent Small Business Office. Their whole job is connecting primes with small business subs, and most run industry days and matchmaking events specifically for this. Find the office for the agencies you already target and get on their outreach list. This is slower than a database search, but it puts a name to your business instead of a line in a spreadsheet.
Read the sources sought notices for team requests
A lot of subcontracting interest shows up before an award, not after. When an agency posts a sources sought notice, primes are often reading the responses to build their own teams for the eventual bid. Responding with a clear capability statement puts you on a prime's radar before they've written a subcontracting plan at all, which is the best position to be in.
What actually moves the needle
None of these channels replace direct outreach. Pull the prime directory, find five to ten primes in your actual lane, and email their subcontracting point of contact with a one-page capability statement. Databases surface opportunities. A real conversation with a procurement or supplier-diversity contact is what gets you into a bid.
Before you commit to chasing subs full time, it's worth weighing the actual tradeoff between subcontracting and priming, since most contractors do not stay in one lane permanently.
Related reading
- 8(a) vs. WOSB vs. HUBZone vs. SDVOSB: which certification fits you
- What is a sources sought notice, and should you respond?