How to Become a Government Subcontractor and Find Prime Contractors

To become a government subcontractor, get a free Unique Entity ID (UEI) from SAM.gov, find the large prime contractors that already win work in your industry, and pitch them before they bid, with a short capability statement aimed at a specific contract. The best places to find primes are SBA's SUBNet, SBA's directory of primes with subcontracting plans, USAspending.gov award data and agency small business offices. A first subcontract gives you federal past performance without having to win a contract on your own.

Prime contractor vs. subcontractor: what's the difference?

A prime contractor holds the contract with the agency. In SBA's words, primes "work directly with the government," manage their subcontractors, and are responsible for getting the work done. A subcontractor does part of that work under a separate contract with the prime.

Your scope, deadlines, price and payment terms all come from your subcontract, not from the government's contract. If something goes wrong, you work it out with the prime.

Should you prime or sub first?

For most new firms, sub first. You learn how federal work runs, build relationships, and earn a reference while the prime carries the bid and the contract risk. SBA notes that subcontracting lets firms that aren't ready to work directly with an agency still take part in federal buying.

The money is real, too. In fiscal year 2025 (FY2025), small businesses won about $179 billion in federal prime contracts, and SBA counted nearly $273 billion once subcontracts were added.

You can still prime without experience: a business can't be found nonresponsible just because it lacks a performance history. Many firms sub on larger jobs and bid small set-asides on their own. The 90-day plan for your first federal contract covers the priming side.

Do subcontractors need SAM.gov registration?

Usually not a full registration, but you'll want a UEI. Here's how the rules fit together as of October 2026:

• Registration is a prime's requirement. The FAR requires offerors to be registered in SAM.gov when they bid and at award. That rule covers the company bidding to the government, not its subcontractors.
• Primes must report your UEI. Under FAR 52.204-10, a prime reports each first-tier subcontract of $40,000 or more by the end of the following month, including the subcontractor's UEI. Those reports now go into SAM.gov. (A prime doesn't have to report a sub that had under $300,000 in gross income the previous tax year.)
• You get the UEI yourself. GSA says primes "will need to know the Unique Entity IDs of subawardees," and that a subcontractor without one "would need to go to SAM.gov" to get it.
• A UEI alone is free and quick. SAM.gov offers a UEI-only option for entities like subcontractors. When your name and address validate, the UEI is issued right away.

Many primes ask for a full registration anyway, so they can confirm your size and certifications in SAM.gov. The FAR doesn't force it: under the subcontracting plan clause (FAR 52.219-9), a prime may accept your written size representation and can't require SAM.gov for it. Still, full registration is free and ends the question.

Why do large primes want small subcontractors?

Because the rules give them goals to hit. When a large business wins a federal contract above $900,000, or $2 million for construction, with real subcontracting possibilities, it generally must submit a subcontracting plan (FAR 19.702 in the current FAR; 19.109 in the FAR overhaul text agencies use). Small businesses are exempt from this.

In that plan, the prime sets goals for subcontracting to small businesses, small disadvantaged businesses, women-owned small businesses, HUBZone firms, veteran-owned firms and service-disabled veteran-owned small businesses (SDVOSBs). The plan must also name the person who runs the prime's subcontracting program and describe how it will give small firms a fair chance to compete.

That's why a certification can help you as a sub. The government-wide SDVOSB goal is at least 5% of prime and subcontract dollars, so a prime with SDVOSB goals has a reason to call an SDVOSB back. The same goes for HUBZone and women-owned goals.

There's a second reason. When agencies score past performance, they can consider a bidder's major subcontractors. A sub with solid, relevant experience makes the prime's proposal stronger.

How to find prime contractors

Start with the primes that already win your kind of work. These free sources were checked in October 2026.

SBA's SUBNet

SBA's SUBNet (subcontracting network) "helps large federal prime contractors find small subcontractors." Large businesses post subcontracting opportunities with a description, closing date, place of performance, NAICS code and contact. Search it at sba.gov/subnet by keyword and state.

SBA's directory of primes with subcontracting plans

SBA publishes a directory of federal prime contractors with subcontracting plans, a spreadsheet listing each contractor, its location, the agency, NAICS and product codes, contract number, dates and total value. When we checked, the latest year posted was FY2024. Filter it by your NAICS code and state to build a target list. SBA's advice is to find each prime's website and follow its directions for becoming a subcontractor.

Some agencies keep their own lists of large primes, too. SBA links to directories from GSA, the Department of Transportation and the Department of Agriculture, among others.

USAspending.gov prime awards and subawards

USAspending.gov shows who wins contracts in your NAICS code, where, and when they end. Sort by amount to find the biggest winners, then check each award's Sub-Awards tab to see which subcontractors they've reported. Our guide to using USAspending.gov walks through the filters step by step.

For a quicker start, FedReady's free agency pages show what each agency buys and its top contractors, from USAspending data. Those top contractors are the primes winning that agency's work.

Agency forecasts and small business offices

Agencies publish procurement forecasts of buys they expect to make. Acquisition.gov links forecasts from more than 20 agencies. A large upcoming buy in your field is a prime you can approach early.

Each agency with buying authority has a small business office, often called the Office of Small and Disadvantaged Business Utilization (OSDBU). SBA says these offices help identify contracting opportunities and host training and networking events. Ask the office which primes hold its big contracts in your area, and whether any upcoming event will include them.

Primes' supplier portals and liaison officers

Many large primes have a supplier or small business page on their website, often with a registration portal. Sign up, but don't stop there: a database entry alone won't get you noticed. A prime with a subcontracting plan must name the person who runs its program, and titles vary (small business liaison officer is a common one). Find that person on the prime's site or at an outreach event, and follow up directly.

SBA's Mentor-Protégé Program

SBA's Mentor-Protégé Program lets a small business learn from a more experienced contractor. Agreements last up to six years, and the mentor and protégé can form a joint venture that competes as a small business. SBA doesn't match you with a mentor: you apply with one already lined up, so it fits best once you've found a larger firm you work well with.

How to approach a prime contractor

Primes get a lot of cold emails. The ones that work are short, specific and tied to a real bid.

Pitch a specific contract

Pick a contract the prime holds that ends in the next year or two, or a forecasted buy it's likely to chase. Primes build their teams before the solicitation drops, so early beats late. Say which part of that work you'd do, where, and why you're a safe pick.

Send a tailored capability statement

Your capability statement should fit on one page: your UEI and CAGE code, NAICS codes, certifications, core work and two or three relevant past jobs, including commercial work. Rewrite the top for each prime so it speaks to that contract.

What primes check before they sign

Expect the prime to vet you. Under the FAR, primes are generally responsible for judging whether their subcontractors are responsible. Common checks:

• Registration and identifiers. Your UEI, and often an active SAM.gov registration and CAGE code.
• Size and certifications. That you're small under the contract's NAICS code, and any SBA certifications that count toward their goals.
• Exclusions. Primes generally can't give a subcontract above a set dollar amount to a debarred or suspended firm, and they check SAM.gov's exclusions list.
• Past performance, insurance and capacity. References, licenses, bonding where needed, and enough staff to deliver.

You can run the same checks on a partner. FedReady's free CAGE code and UEI lookup shows a small business's SAM.gov registration status, SBA certifications and any active exclusion.

Teaming agreements in plain terms

A teaming agreement is an agreement you sign before the bid. The current FAR (9.601) describes two kinds of team: firms forming a joint venture to bid as the prime, or a prime agreeing to use other firms as its subcontractors on a specific contract. (The FAR overhaul text moved this guidance to its non-regulatory companion.)

A typical agreement covers the scope you'll get if the team wins, exclusivity, who writes which parts of the proposal, confidentiality, and what happens if you lose. Read carefully for promised work share. This isn't legal advice: have an attorney or an APEX Accelerator review it before you sign.

How do subcontractors get paid?

The prime pays you, under your subcontract. The government's prompt payment rules run between the agency and the prime, so your payment terms are whatever you negotiate. Read them before you sign: when you can invoice, how many days the prime has to pay, and whether you get paid only after the prime does.

A few federal rules help small subs:

• On-time payment pledge. A prime with a subcontracting plan must agree to pay its small business subcontractors on time and under the subcontract's terms, and to tell the contracting officer when it makes a reduced or late payment (FAR 52.219-9).
• Accelerated payments. When the government pays a prime early under FAR 52.232-40, the prime must, to the maximum extent practicable, pay its small business subs early too, within 15 days of getting the government's payment, with no fee. That clause doesn't create new Prompt Payment Act rights.
• Construction. On federal construction contracts, the prime must pay subs for satisfactory work within 7 days of being paid, with interest on late payments (FAR 52.232-27).

If a prime doesn't pay you, tell the contracting officer. Under FAR 32.112-1, a sub's claim of nonpayment lets the contracting officer look into it and, on some contracts, act on the prime's payments. It doesn't make the agency pay you directly, so strong payment terms in your subcontract are your best protection.

How to become a government subcontractor: a step-by-step checklist

Expect this to take months. Treat it like sales: keep a list and follow up.

When you're ready to look for partners in bulk, a free FedReady account includes market research on agencies, companies and past awards, and paid plans add a teaming partner finder.

Next steps

Get your one-pager ready with our guide to writing a capability statement, then use USAspending.gov to build your list of primes. Then watch for sources sought notices, which show buys an agency is still planning.

This guide is general information, not legal or financial advice. Rules and thresholds change, so confirm details on SAM.gov and the official agency sites linked above before you act. FedReady is an independent company and is not affiliated with any government agency.