If you’ve ever wondered what insurance does a prime contractor require from subs, the answer goes well beyond a basic policy card. Primes require specific coverage types, minimum limits, policy endorsements, and precise certificate language, and gaps in any one of those areas can stall or kill a teaming deal before it starts. This guide covers all of it: the coverage types primes require, the limits they actually accept, the endorsements most subs miss, and sample COI language you can hand directly to your broker.
The teaming agreement looked solid. The scope was clear, the roles made sense, and both parties were ready to move. Then the insurance requirements page showed up. Suddenly the sub is scrambling to figure out what “primary and noncontributory” means, whether their current policy covers it, and how to get a certificate of insurance out before the deadline.
This is where teaming deals fall apart, not over money or performance history, but over insurance paperwork nobody prepared for. At Risk Reconnaissance LLC, we see the same coverage gaps repeat across teaming agreements, and most are avoidable. The problem isn’t that subs carry bad insurance. It’s that their policies weren’t built with a prime contractor’s subcontractor insurance requirements in mind.
What insurance does a prime contractor require: coverage types explained
Every prime contractor’s insurance exhibit is slightly different, but the core coverage types are consistent across most teaming agreements and subcontracts. Understanding why each coverage matters to the prime helps you explain your own policy, negotiate requirements, and close gaps before they become problems.
General liability: the non-negotiable baseline
Commercial general liability (CGL) insurance is the first thing every prime will require. It must be written on an occurrence basis, meaning a claim is covered if the incident happened during the policy period, regardless of when the claim is filed. Primes require it because they can be pulled into third-party claims that trace back to work the sub performed. If your work causes property damage or bodily injury, the prime’s name often ends up in the dispute.
Products and completed operations coverage is frequently listed as an explicit requirement alongside standard CGL. This extends coverage to claims that arise after the work is finished. Many subs assume it’s automatically included, but some policy forms limit it. Confirm it’s active and listed on your certificate.
Workers’ compensation and employers’ liability
Statutory workers’ compensation is required in nearly every state once you have employees on payroll. Primes require it because if a sub’s employee is injured and the sub has no coverage, the prime can be pulled into the claim. Employers’ liability is a separate limit that covers claims outside the workers’ comp system, for example, a lawsuit by an employee alleging negligence.
For overseas work on federal contracts, domestic workers’ comp alone is not enough. That’s where Defense Base Act insurance enters the picture.
Defense Base Act (DBA) insurance for overseas subs
DBA insurance is the federal equivalent of workers’ compensation for employees working outside the United States on U.S. government contracts. It applies to work on military installations, public works projects, and other overseas government-funded jobs. Many subs don’t realize their prime will flag this subcontractor insurance requirement if any work is performed abroad, even briefly.
Primes face direct liability exposure under the Defense Base Act if their subs aren’t covered. That’s why they require proof of DBA coverage before the subcontract is executed. Standard domestic workers’ comp does not satisfy the DBA requirement, you need a separate policy.
Professional liability and commercial auto
If your scope includes advisory services, technical consulting, design work, or engineering, the prime will likely require professional liability (also called errors and omissions, or E&O). This coverage responds to claims that your professional advice or service caused financial harm. It’s written on a claims-made basis, which means the policy in force when the claim is filed must cover the period when the work was performed.
Commercial auto coverage is required when your employees use vehicles for contract work. Primes typically want coverage for owned, hired, and non-owned autos on a single policy. If your team drives personal vehicles to a job site, non-owned auto coverage becomes especially relevant.
Builders risk insurance: when it applies
Some prime contractors, particularly those overseeing construction, renovation, or infrastructure work on federal facilities, may require builders risk insurance as part of the subcontractor insurance requirements package. Builders risk covers property damage to a structure under construction, including materials and equipment on site. If your scope touches any physical build-out on a government project, ask the prime whether their insurance exhibit includes a builders risk requirement before assuming it doesn’t apply to you.
Minimum coverage limits that actually get approved
Carrying the right type of coverage isn’t enough. Subs get rejected regularly because their limits don’t meet the prime’s minimums. These are the floors most primes work from.
The standard minimum package most primes accept
The most common baseline package looks like this:
- Commercial general liability: $1,000,000 per occurrence / $2,000,000 general aggregate
- Commercial auto: $1,000,000 combined single limit (CSL)
- Workers’ compensation: statutory limits per state law
- Employers’ liability: $1,000,000 per accident / disease
These are starting points, not ceilings. Larger contracts, higher-risk work categories, or DoD-specific requirements often push these numbers up. Always read the insurance exhibit in the actual teaming agreement rather than assuming standard minimums apply.
When primes require umbrella or excess liability
Umbrella coverage follows form over the underlying CGL, auto, and employers’ liability policies, kicking in when primary limits are exhausted. Most primes require umbrella limits between $1,000,000 and $5,000,000, depending on contract size and risk profile. Larger DoD contracts and high-risk work scopes almost always trigger an umbrella requirement. If yours does, confirm that the umbrella policy lists the same additional insured endorsements as the underlying policies.
DBA and professional liability limits
DBA limits are typically statutory, mirroring the workers’ comp equivalency structure. For professional liability, $1,000,000 per claim is the most common minimum for consulting and advisory subs. Because professional liability is claims-made, prior acts coverage matters. If you switch carriers mid-contract, make sure your retroactive date doesn’t create a gap in coverage for work already performed.
The endorsements every sub needs, and what insurance a prime contractor requires beyond basic limits
This is where most subs get caught off guard. They carry the right coverage at the right limits, but the prime rejects the certificate anyway. The missing piece is almost always an endorsement.
Additional insured status: what it actually does
Naming the prime as an additional insured extends your policy’s liability coverage to them for claims that arise from your work. This is not automatic just because you list someone on a certificate of insurance. The endorsement must exist in the policy itself. Two ISO endorsements are used most often: CG 20 10 covers ongoing operations (while work is being performed), and CG 20 37 covers completed operations (after the work is done). Primes commonly require both, and for good reason.
Primary and noncontributory wording
Without primary and noncontributory wording, the prime’s own insurance could be asked to share the cost of a claim. Primes don’t want that. They want their exposure isolated so that your policy responds first and entirely. This language must appear in the policy endorsement, not just in the description of operations field on the certificate. Sample language that primes typically accept: “This insurance is primary to, and will not seek contribution from, any other insurance available to the additional insured.”
Waiver of subrogation and cancellation notice
A waiver of subrogation prevents your insurer from pursuing the prime after paying a claim on your behalf. Without it, your carrier could recover costs from the prime, which defeats the purpose of the risk transfer arrangement. Both the waiver of subrogation and the 30-day cancellation notice must appear in the policy endorsement to have any contractual standing. Certificate language alone doesn’t create these rights. Many insurers use “will endeavor to” language for cancellation notice rather than a firm guarantee, confirm what your policy actually says before submitting.
What your COI must show (with sample description of operations language)
A certificate of insurance is proof of coverage, not coverage itself. The ACORD 25 is the standard form, and every field matters when you’re submitting to a prime. Below is a sample COI description to help you show what insurance a prime contractor requires from its subs.
The ACORD 25 fields that matter most
The named insured on the certificate must match the legal entity named in the teaming agreement exactly. Even a small difference, “LLC” versus “Inc.” or a missing word, can cause a rejection. The certificate holder field must show the prime’s exact legal name and address. Policy numbers, effective dates, expiration dates, and limits must all match the contractual requirements. If your policy renews before the contract ends, make sure the renewal certificate reaches the prime on time.
The description of operations field references the required endorsements, but it does not create them. Think of it as a summary of what the policy already contains, not a place to make promises your policy can’t keep.
Sample COI description of operations language
Here is a practical sample you can hand directly to your broker:
“Re: [Contract Name/Task Order]. [Prime Contractor Legal Name] is included as an Additional Insured on a Primary and Noncontributory basis with respect to General Liability, including Completed Operations per endorsements CG 20 10 and CG 20 37, Auto Liability, and Umbrella/Excess Liability, where required by written contract. Waiver of Subrogation applies to General Liability, Auto Liability, and Workers’ Compensation where required by written contract and policy endorsement.”
Every line in that paragraph must be backed by an actual endorsement in the policy. If your broker can’t confirm that, the language shouldn’t be there. Note that some states, including Texas, have restrictions on what certificate language is legally permissible, so your broker needs to know where the work is performed.
What happens when a sub’s coverage falls short
Missing coverage or wrong limits don’t just create paperwork problems. They create real business problems.
The teaming agreement stalls or gets pulled
Primes typically won’t countersign a teaming agreement until insurance compliance is confirmed. A gap in coverage or a missing endorsement means the sub can’t perform. The prime moves on. For time-sensitive proposals or IDIQ task orders, even a two-day delay in producing a compliant certificate can mean losing the work entirely. The window doesn’t stay open.
The sub absorbs the prime’s liability exposure
If a claim arises and your policy doesn’t cover the prime as an additional insured, the prime’s own insurance pays the claim, then the prime comes back at you contractually. Most subcontracts include indemnification clauses triggered specifically when insurance requirements weren’t met. The financial exposure that follows is almost always larger than the cost of getting the coverage right the first time.
Getting your insurance package ready before the teaming deadline
Understanding what insurance does a prime contractor require is most valuable before you sign a teaming agreement, not the day after the deadline hits.
Why most generalist brokers slow you down
A broker unfamiliar with GovCon contracting will spend time learning what the requirements even mean before they can start building coverage. That lag is a serious problem when teaming deadlines are measured in days. Subs often end up with coverage that technically passes a basic review but doesn’t meet the prime’s specific endorsement language. The certificate gets rejected, the deadline passes, and the opportunity is gone.
How Risk Reconnaissance LLC structures compliant packages proactively
Risk Reconnaissance LLC is built specifically for government and defense contractors. The team already knows what prime contractor insurance requirements look like across common contract vehicles, including GSA schedules, IDIQ task orders, and DoD subcontracts. They can review a teaming agreement’s insurance exhibit and identify gaps before the deadline, not after. There’s no time lost explaining what a Contracting Officer is or what DBA coverage does. They already speak the language.
If your teaming agreement includes an insurance requirements page, bring it to Risk Reconnaissance LLC before you sign anything. A quick review now is far less expensive than losing a contract over a missing endorsement.
Prime contractors set these subcontractor insurance requirements not to create a paperwork burden, but because their own liability exposure depends on what their subs carry. A sub who understands that dynamic shows up as a real partner, not a compliance problem. Knowing what insurance does a prime contractor require, and having it in place before the conversation starts, is one of the simplest ways to move faster than your competition in the GovCon space. Reach out to Risk Reconnaissance LLC to make sure your coverage is already where it needs to be.