How Long Should Contractors Keep Certificates of Insurance?

Contractors should generally keep subcontractor certificates of insurance for at least seven to ten years after the subcontractor finishes the work, but there is no single retention period that applies to every contractor, project, or state.

The correct period may depend on:

• The subcontract’s record-retention requirements
• State statutes of limitation and repose
• The type of work performed
• Completed operations exposure
• Workers’ compensation audit rules
• Government contract requirements
• Open claims or known incidents
• The insurance policy’s coverage structure

For construction and home service work that could cause damage years later, keeping certificates and supporting endorsements for ten years after substantial completion is often a more cautious approach than deleting them after a policy expires.

Certificates should also be retained throughout the project and for as long as a claim, audit, lawsuit, or contractual dispute remains possible. When a claim has already been made—or an incident could reasonably develop into one—the relevant insurance records should not be destroyed until the matter has been fully resolved and any required legal hold has ended.

Recommended COI Retention Periods at a Glance

The following periods are practical guidelines rather than universal legal rules:

Record or situation	Practical retention approach
Active subcontractor COI	Keep throughout the subcontractor’s work
Routine completed project	Generally retain for at least 7–10 years
Construction with long-tail defect exposure	Consider 10 years or the applicable statute of repose
Open claim or lawsuit	Keep until final resolution and any appeal period ends
Known accident or potential claim	Preserve indefinitely until advised that disposal is appropriate
Government contract	Follow the contract and applicable procurement rules
Workers’ compensation evidence	Keep through audits and applicable state retention periods
Claims-made policy documentation	Keep permanently or for as long as the policy history may matter
Expired COI replaced by a renewal	Keep both the expired and renewed documents
Completed operations endorsement	Retain with the project file for the full post-completion exposure period

The key is to retain records until the longest applicable legal, contractual, insurance, and operational deadline has passed.

Is There a Federal Law Requiring Contractors to Keep COIs?

There is no single federal law establishing one universal retention period for every contractor certificate of insurance.

A contractor’s obligations may instead come from:

• State construction law
• State workers’ compensation requirements
• Federal or state government contracts
• The prime contract
• Subcontract agreements
• Insurance audit provisions
• Licensing rules
• Tax and employment record requirements

Certificates of insurance are also not substitutes for the policies and endorsements they summarize. The Texas Department of Insurance explains that a certificate cannot amend, extend, or alter the coverage contained in an insurance policy.

For that reason, contractors should preserve not only the COI but also the endorsements and agreements needed to prove what insurance protections were actually required and provided.

Why Contractors Should Keep Expired Certificates

A certificate may expire, but the work performed during that policy period can still lead to a future claim.

Examples include:

• A plumbing connection leaks several years after installation.
• Completed electrical work allegedly causes a later fire.
• A roof begins allowing water intrusion after multiple seasons.
• A mounted cabinet or fixture eventually falls.
• A customer claims that remodeling work damaged the building.
• A former subcontractor’s employee alleges a work-related injury.
• A general contractor receives a premium audit involving past subcontractors.

The old certificate helps identify which insurance company and policy were in force when the subcontractor performed the work.

This can be especially important under an occurrence-based general liability policy. An occurrence policy is generally triggered by covered bodily injury or property damage occurring during the policy period, even when the claim is reported later. The correct historical policy may therefore matter years after the contractor receives a newer certificate.

Discarding expired COIs can make it difficult to identify the relevant insurer, policy number, dates, and limits.

Why Seven to Ten Years Is a Common Practical Range

The recommended period often reflects the amount of time during which construction-related claims may still be filed.

State statutes differ considerably. Some states impose statutes of repose that create an outside deadline for certain construction defect claims.

For example, California generally prohibits specified actions against people involved in constructing or designing improvements to real property more than ten years after substantial completion.

Texas also uses a ten-year statute of repose for many claims against people who construct or repair improvements to real property, subject to statutory exceptions.

These examples do not create a nationwide ten-year rule. They illustrate why deleting subcontractor insurance records after only one or two years may be risky.

A contractor should check the limitation and repose periods in the state where the project was performed. The relevant period may also differ according to whether a claim involves:

• Written contracts
• Property damage
• Bodily injury
• Construction defects
• Fraud or misrepresentation
• Workers’ compensation
• Professional services
• Government work

When several deadlines could apply, the contractor should generally retain the records for the longest relevant period.

Start Counting From the Right Date

A contractor should not always calculate the retention period from the date the COI was issued.

Depending on the project and applicable law, the more appropriate starting point may be:

• The subcontractor’s last day of work
• Substantial completion
• Final project completion
• Final payment
• Termination of the subcontract
• The end of a maintenance or warranty period
• Discovery of an incident
• Closure of an insurance claim

Suppose a subcontractor provides a certificate in January 2026 but continues working until December 2027. A ten-year retention period calculated from the certificate’s issue date would expire too early.

The project file should record the actual completion date so that documents are not destroyed before the post-completion exposure period ends.

Keep Every Renewal Certificate

Long projects can span several insurance policy periods.

If a subcontractor’s general liability policy expires while work is underway, the contractor should obtain a renewal certificate and retain both documents.

For example:

• First policy: January 1, 2026, through January 1, 2027
• Renewal policy: January 1, 2027, through January 1, 2028

A loss might relate to work performed during either policy period. Keeping only the latest COI could make it harder to identify the policy connected to an earlier incident.

Maintain a continuous certificate history showing:

• No unexplained gaps
• Correct policy dates
• Consistent named insured information
• Required limits
• Applicable endorsements
• Any change in insurer or policy number

If the subcontractor changes insurers, preserve the records from both companies.

A COI Alone Is Not Enough

A certificate should be stored with the documents that establish the full insurance arrangement.

The project insurance file may include:

• Certificate of insurance
• Additional insured endorsement
• Completed operations endorsement
• Primary and noncontributory endorsement
• Waiver-of-subrogation endorsement
• Workers’ compensation certificate
• Commercial auto evidence
• Umbrella or excess liability evidence
• Professional or pollution liability certificate
• Written subcontract
• Insurance requirements from the prime contract
• Communications with the insurance agent
• Verification notes
• Policy renewal documents

Being listed as certificate holder does not automatically make the contractor an additional insured. Additional insured protection must be supported by the policy or an endorsement.

Similarly, wording typed into the description-of-operations box cannot create completed operations, primary and noncontributory, or waiver-of-subrogation protection that the policy does not contain.

Retaining the endorsement is therefore often more important than retaining the certificate alone.

How Long Should Completed Operations Endorsements Be Kept?

Completed operations endorsements should generally be retained for the entire period during which a claim arising from finished work could still be made.

These endorsements may become important when a subcontractor’s completed work later causes alleged bodily injury or property damage.

Examples include:

• A pipe fitting leaks after the building is occupied.
• A completed electrical installation causes a later loss.
• Roofing work allegedly leads to hidden water damage.
• A secured object detaches after the project is finished.

The contractor should retain the endorsement along with:

• The subcontract
• Project completion records
• Final inspection documents
• Warranty information
• COIs for every relevant policy term

When a contract requires completed operations additional insured protection for a specific number of years, keep the documents for at least that period and longer when state law creates a longer potential exposure.

Workers’ Compensation Certificates and Audits

Workers’ compensation certificates can be important during premium audits and employee-classification disputes.

General contractors may be charged additional premium when they cannot prove that subcontractors carried their own workers’ compensation insurance. New York’s Workers’ Compensation Board notes that insurers commonly assess general contractors for subcontractor exposure unless the subcontractors furnish proof of their own coverage.

Retain:

• Workers’ compensation certificates
• State exemption documents
• Subcontractor payroll or payment records
• Subcontracts
• Invoices
• Form W-9
• Verification results
• Renewal certificates

Keep these documents through the final insurance audit and any period in which the audit can be challenged or reopened.

Related federal records have their own requirements. The IRS requires employment tax records to be kept for at least four years. OSHA requires covered employers to retain specified injury and illness records for five years after the end of the calendar year they cover.

Those rules do not directly establish the COI retention period, but they demonstrate why subcontractor insurance records should be coordinated with broader payroll, safety, and tax files.

Government Contract Record-Retention Requirements

Government contracts may impose specific recordkeeping obligations.

Under the Federal Acquisition Regulation, federal contractors may be required to retain certain contract records for three years after final payment, while other categories have their own prescribed periods. Records connected to appeals, litigation, or claims may need to remain available until those matters are finally resolved.

A government contract may also require a contractor to flow insurance obligations down to subcontractors and maintain proof of compliance.

Contractors performing federal, state, municipal, or public works projects should follow the specific contract rather than relying only on a general seven- or ten-year internal policy.

When the contract requires a longer period than the company’s normal schedule, the contract should control.

Claims-Made Policies May Require Longer Retention

Some insurance, particularly professional liability and pollution liability, may be written on a claims-made basis.

Claims-made coverage generally depends on when the claim is made and reported, along with the policy’s retroactive date and other conditions. The California Department of Insurance describes claims-made coverage as applying to claims filed during the policy period, subject to a retroactive inception date.

For these policies, preserve:

• Every certificate
• Declarations pages
• Retroactive dates
• Renewal policies
• Extended reporting endorsements
• Evidence of continuous coverage
• Claim notices
• Project-specific endorsements

Because continuity and retroactive dates may matter years later, contractors may choose to retain these records permanently.

Never Destroy Records During a Claim or Dispute

Normal destruction schedules should be suspended when the contractor becomes aware of:

• An accident
• Customer complaint
• Demand letter
• Insurance claim
• Employee injury
• Property damage
• Government investigation
• Premium audit dispute
• Lawsuit
• Threatened litigation
• Subpoena or records request

This is sometimes referred to as a legal hold.

The contractor should preserve all potentially relevant documents, including expired certificates, endorsements, photographs, contracts, invoices, emails, text messages, and inspection records.

Records relating to litigation or claims should remain intact until the matter and any related appeal or recovery action are fully resolved.

Should COIs Be Kept Permanently?

Permanent storage may be appropriate when:

• The project involved structural construction.
• Professional or design services were provided.
• Claims-made coverage applied.
• Hazardous materials were involved.
• The contract requires permanent or unusually long retention.
• The completion date cannot be verified.
• The project has already produced a claim.
• The cost of secure digital storage is minimal.

Modern electronic storage makes long-term retention relatively inexpensive. A well-organized digital archive may be safer than attempting to calculate separate destruction dates for every subcontractor and endorsement.

However, contractors must still protect sensitive personal and business information and comply with applicable privacy and data-security rules.

How to Organize Subcontractor Insurance Records

Create a separate digital file for each project and subcontractor.

A practical naming structure is:

Project – Subcontractor – Coverage Type – Policy Period

For example:

Oak Street Remodel – ABC Plumbing LLC – General Liability COI – 2026-2027

Store:

1. Original certificate
2. Endorsements
3. Verification correspondence
4. Renewal documents
5. Subcontract
6. Completion date
7. Retention or destruction date
8. Claim information, when applicable

Use reminders to obtain renewal documents before policies expire. Restrict editing permissions so certificates cannot be accidentally modified.

Back up the archive in more than one secure location.

Frequently Asked Questions

How long should a general contractor keep subcontractor COIs?

A practical approach is generally at least seven to ten years after the subcontractor’s work is completed, subject to longer contractual or state-law requirements.

Can you discard a COI after the policy expires?

Usually, that is not advisable. A future claim may relate to work performed during the expired policy period.

Should renewed certificates replace old certificates?

No. Keep each certificate to preserve a complete insurance history for the project.

Does every state have a ten-year rule?

No. Statutes of limitation and repose differ by state and type of claim.

Should endorsements be kept with the COI?

Yes. The actual endorsements provide evidence of additional insured, completed operations, primary and noncontributory, and waiver-of-subrogation protection.

How long should COIs be kept after a claim?

Keep them until the claim, litigation, appeals, and related recovery actions are fully resolved. Do not follow a routine destruction schedule during an active dispute.

Can certificates be stored electronically?

Yes. Secure digital storage is generally practical as long as records remain readable, complete, backed up, and protected against unauthorized changes.

Should contractors keep their own old insurance certificates?

Yes. Contractors should retain their own COIs, policies, endorsements, and renewal records for the same reasons they retain subcontractor documentation.

Conclusion

Contractors should generally keep certificates of insurance for at least seven to ten years after a subcontractor completes the work, but that range is only a practical starting point.

The controlling retention period may be longer because of a written contract, state statute of repose, government requirement, completed operations exposure, claims-made policy, premium audit, or active claim.

Do not destroy a COI simply because the listed policy has expired. Preserve every renewal certificate and keep the supporting endorsements, subcontract, verification records, and completion information in the same project file.

For construction work with potential long-term defect exposure, a ten-year minimum—or permanent secure digital retention—may be the safer approach. Before adopting a company-wide destruction schedule, review the applicable state law, contracts, and insurance requirements with qualified legal and insurance professionals.

Editorial review: This guide was researched and reviewed by the Coverage Editorial Team using government agencies, insurance regulators, licensing authorities, policy documentation, and current industry pricing sources.