Per-Project Aggregate Limits: Why GCs Require Them
- Jul 23
- 6 min read
If you've ever bid a job and the general contractor asked for a "per-project aggregate endorsement," you may have wondered why it's necessary. For many contractors, it's one of those insurance requirements that appears in a contract but isn't fully explained.
The truth is that per-project aggregate limits can play an important role in construction risk management. General contractors often require them because they help ensure that insurance limits remain available for a specific project, rather than being reduced by claims from unrelated jobs.
What Are Per-Project Aggregate Limits?
To understand per-project aggregate limits, it helps to first understand what an aggregate limit is.
A general liability insurance policy typically includes an aggregate limit, which is the maximum amount the policy may pay for covered claims during the policy period, subject to policy terms and conditions.
Without a per-project aggregate endorsement, that aggregate limit is generally shared across all of your projects during the policy term.
A per-project aggregate limit changes how that aggregate is applied. Instead of one aggregate limit being spread across all projects, the policy may apply a separate aggregate limit to each qualifying project.
This distinction can be important on larger construction jobs where multiple contractors and subcontractors are working at the same time.
Why Do General Contractors Require Per-Project Aggregate Limits?
The simple answer is that general contractors want to reduce the risk that your liability limits will be exhausted by claims from other projects.
When a subcontractor works on multiple jobs throughout the year, claims occurring elsewhere could potentially reduce the amount of available insurance for a current project.
A per-project aggregate endorsement helps address that concern by separating aggregate limits by project.
General contractors often require per-project aggregate limits because they:
Help preserve liability limits for a specific job
Reduce concerns about claims from unrelated projects
Meet contractual insurance requirements
Support project risk management efforts
Provide additional confidence to project owners and lenders
This is particularly common on larger commercial and public construction projects where insurance requirements are closely scrutinized.
The Direct Answer: Why Do GCs Require Per-Project Aggregate Limits?
General contractors require per-project aggregate limits because they want to make sure that liability coverage available for their project is not reduced by claims arising from a subcontractor's other jobs.
By applying aggregate limits separately to individual projects, a per-project aggregate endorsement may help preserve insurance protection for the project where the work is
being performed, subject to the policy's terms and conditions.
How Per-Project Aggregate Limits Work
Let's look at a simplified example.
Imagine a contractor has multiple projects underway during the year.
Without per-project aggregates:
One aggregate limit applies across all projects.
Claims from any job may reduce the total available limit.
Multiple losses on different projects could potentially consume available insurance limits.
With per-project aggregates:
Each qualifying project may receive its own aggregate limit.
Claims from one project generally do not reduce the aggregate available for another qualifying project.
Coverage may remain available for separate projects, depending on policy terms.
The specific mechanics vary by policy form and endorsement language, which is why it's important to review the details with your insurance agent.
Per-Project Aggregate vs. General Aggregate
Many contractors confuse these terms.
While they are related, they are not the same thing.
General Aggregate
The general aggregate is the overall limit that applies to covered claims during the policy period.
Without special endorsements, it is commonly shared among all operations and projects covered by the policy.
Per-Project Aggregate
A per-project aggregate endorsement typically separates aggregate limits by project.
This may help prevent losses from one project from affecting the insurance available for another project.
General contractors often prefer this structure because it provides greater predictability when evaluating subcontractor insurance requirements.
Which Contractors Are Most Likely to Need Per-Project Aggregate Limits?
Not every contractor will encounter this requirement.
However, it is commonly requested from:
General contractors
Electrical contractors
Plumbing contractors
HVAC contractors
Roofing contractors
Drywall contractors
Concrete contractors
Excavation contractors
Framing contractors
Utility contractors
Businesses working on commercial construction projects are more likely to see this requirement than those focused primarily on residential work.
Where Will You See This Requirement?
Per-project aggregate requirements most often appear in:
Construction contracts
Subcontract agreements
Vendor agreements
Public project bid specifications
Commercial project insurance requirements
Many contractors first learn about per-project aggregate limits after receiving a contract from a general contractor.
The contract may require documentation showing that the endorsement has been added to the policy before work can begin.
Organizations such as the Associated General Contractors of America provide educational resources regarding construction contracts and risk management practices at https://www.agc.org.
How Is the Endorsement Added?
In many cases, a per-project aggregate endorsement can be added to a commercial general liability policy if the insurer offers it.
The process typically includes:
Reviewing project requirements.
Confirming eligibility with the insurer.
Requesting the endorsement.
Updating policy documentation.
Providing proof of coverage if required.
Not every policy automatically includes this endorsement, and availability may vary depending on the insurer, state, and type of operation.
Always verify compliance requirements with your insurance professional before signing a contract.
Is a Per-Project Aggregate the Same as Additional Insured Coverage?
No.
These are separate insurance requirements that often appear together in construction contracts.
Additional Insured Coverage
Additional insured status may extend certain liability protection to another party, such as a general contractor, depending on policy terms and endorsement language.
Per-Project Aggregate Limits
Per-project aggregate limits address how liability limits are applied across projects.
One endorsement does not replace the other.
Many contracts require both.
You may also encounter requirements for:
Waiver of subrogation
Primary and noncontributory wording
Completed operations coverage
Ongoing operations coverage
Specific liability limits
What Are the Benefits of Per-Project Aggregate Limits?
The primary advantage is that they may help preserve insurance limits for individual projects.
Potential benefits include:
Stronger Contract Compliance
Many general contractors require this endorsement before awarding a contract.
Better Risk Allocation
Separate aggregate limits may help isolate exposure between projects.
Increased Project Confidence
Project stakeholders often prefer knowing that unrelated claims are less likely to affect available limits.
Competitive Advantage
Having the required endorsement in place can help contractors satisfy insurance requirements more efficiently during the bidding process.
Are Per-Project Aggregate Limits Required by Law?
Generally, no.
Per-project aggregate limits are usually contractual requirements rather than legal requirements.
A project owner, general contractor, lender, or developer may require them as part of a project's risk management strategy.
Requirements vary widely based on:
Project size
Contract language
Location
Industry standards
Owner preferences
Construction requirements change over time, so contractors should verify current obligations with project managers and licensed insurance professionals.
How Much Do Per-Project Aggregate Endorsements Cost?
Contractors often ask whether adding a per-project aggregate endorsement is expensive.
The answer depends on several factors, including:
Business operations
Annual revenue
Type of work performed
Claims history
Project size
State requirements
Insurer underwriting guidelines
Costs vary widely, and there is no universal pricing structure.
Some contractors may find the endorsement relatively affordable, while others may experience different pricing depending on their risk profile and operations.
The best way to determine cost is to discuss your specific situation with a licensed insurance agent.
Common Mistakes Contractors Make
Many contractors run into insurance problems because they overlook contract requirements.
Common mistakes include:
Signing contracts before reviewing insurance requirements
Assuming all liability policies include per-project aggregates
Confusing aggregate limits with occurrence limits
Waiting until the last minute to request endorsements
Failing to provide updated certificates of insurance
Reviewing insurance requirements before submitting bids can help avoid delays and unexpected complications.
Tips for Meeting General Contractor Insurance Requirements
Before signing a subcontract agreement:
Obtain the insurance requirements early
Review all endorsements being requested
Send requirements to your insurance agent
Confirm whether your current policy complies
Address any coverage gaps before work starts
Keep documentation organized for future projects
These steps can make contract compliance much easier and help prevent project delays.
Frequently Asked Questions
What is a per-project aggregate limit?
A per-project aggregate limit is an endorsement that typically applies a separate aggregate liability limit to each qualifying project rather than sharing one aggregate across all projects.
Why do general contractors require per-project aggregate limits?
General contractors require them to help ensure that claims from a subcontractor's unrelated projects do not reduce the insurance limits available for their project.
Is a per-project aggregate required on every construction project?
No. Requirements vary by contract, project owner, general contractor, and project size.
Does a per-project aggregate increase coverage?
Not necessarily. It changes how aggregate limits may be applied across projects, subject to policy terms and endorsements.
Is a per-project aggregate the same as additional insured coverage?
No. Additional insured status and per-project aggregate limits are separate endorsements that serve different purposes.
Need Help Understanding Contractor Insurance Requirements?
Construction contracts often contain complex insurance requirements that can be difficult to interpret. Whether you're being asked for a per-project aggregate endorsement, additional insured status, or waiver of subrogation, understanding the requirements before signing can help you avoid costly surprises.
Wexford Insurance works with contractors and service businesses across the country to help them navigate contract insurance requirements and evaluate coverage options that fit their operations.
Request a free quote today and speak with a licensed Wexford Insurance professional about your contractor insurance needs.
Insurance requirements can be confusing, especially when contracts include endorsements that many contractors rarely encounter. Our team helps contractors understand what project owners and general contractors are requesting and how those requirements may affect their insurance program.
For additional construction industry resources, visit the Associated Builders and Contractors at https://www.abc.org.
Call 317-942-0549 or visit https://www.wexfordins.com/ to discuss your business insurance needs with a licensed insurance professional.
