Subcontractor COI Requirements Michigan

Managing subcontractor certificates of insurance (COIs) is one of the most consequential compliance responsibilities for general contractors and construction managers operating across Michigan. From large commercial developments in Detroit and Grand Rapids to public infrastructure projects in Lansing, Flint, and Ann Arbor, Michigan’s construction industry is governed by a combination of state law, local ordinance, and contract-level insurance requirements that demand consistent, documented COI oversight. Failing to verify that every subcontractor on your project carries adequate, current insurance coverage can expose your firm to uncovered claims, bid disqualification, regulatory penalties, and serious legal liability.

This page provides a comprehensive overview of subcontractor COI requirements Michigan contractors and project owners need to understand — including the types of coverage required, how compliance is tracked across active job sites, common challenges GCs face, and the tools available to manage the process more efficiently. Whether you are a general contractor in Macomb County, a construction manager on a Detroit Brownfield redevelopment, or a specialty subcontractor trying to understand what your COI needs to include, this guide will give you the clarity you need.

Subcontractor Insurance Requirements in Michigan

Michigan does not have a single statewide statute that dictates the precise insurance limits subcontractors must carry on every private construction project. Instead, insurance requirements are typically established through contract documents — the subcontract agreement between a general contractor and a subcontractor — informed by state law minimums, owner-driven specifications, and lender requirements. That said, several foundational insurance coverages are consistently required across Michigan construction projects of virtually every size and type.

Commercial General Liability (CGL): General liability insurance is the baseline coverage required from every subcontractor on Michigan construction sites. Most contracts call for a minimum of $1 million per occurrence and $2 million in aggregate coverage, though larger projects — particularly those involving Michigan’s major public agencies, automotive facilities, or healthcare construction — regularly demand higher limits. CGL covers bodily injury and property damage arising from the subcontractor’s operations, completed operations, and products liability. Many Michigan GC contracts also require the completed operations coverage to remain in effect for a period of years after project completion, particularly on commercial and public projects.

Workers’ Compensation Insurance: This is one of the most legally mandated coverages in Michigan. Under the Michigan Workers’ Disability Compensation Act (Act 317 of 1969), employers meeting certain thresholds — generally one employee working 35 or more hours per week, or three or more employees at any time — must carry workers’ compensation insurance. For construction subcontractors, this threshold is effectively met by nearly every firm with any employees. Critically, Michigan law can impose liability on general contractors for workers’ compensation claims involving injured employees of uninsured subcontractors. This makes COI verification of workers’ comp coverage a non-negotiable step in the subcontractor onboarding process.

Employer’s Liability: Often bundled with workers’ compensation, employer’s liability coverage (commonly referred to as Part B of a workers’ comp policy) protects against lawsuits by employees who suffer workplace injuries and allege employer negligence beyond the scope of a standard comp claim. Minimum limits of $100,000 per occurrence are common, with many Michigan contracts requiring $500,000 or higher.

Commercial Auto Liability: Subcontractors whose work involves the use of vehicles — delivering materials, hauling equipment, or transporting workers — must carry commercial auto liability insurance. Combined single limit minimums of $1 million are standard on most Michigan construction contracts. Michigan’s no-fault auto insurance system adds an additional layer of complexity, as subcontractors need to ensure their commercial policies align with the state’s unique no-fault framework.

Umbrella or Excess Liability: On larger projects and public contracts in Michigan, subcontractors are frequently required to carry umbrella or excess liability coverage above their primary CGL and auto liability limits. Umbrella requirements of $2 million to $10 million are not uncommon on Michigan highway projects, bridge work, or large commercial developments.

Professional Liability / Errors and Omissions: Design-build subcontractors, engineers, architects, and specialty consultants on Michigan projects are increasingly required to carry professional liability insurance. This is especially relevant on design-build public projects administered through the Michigan Department of Transportation (MDOT) or local municipalities.

In addition to carrying these coverages, Michigan subcontractors must typically name the general contractor — and often the project owner and lender — as additional insureds on their CGL and umbrella policies. The COI must reflect this endorsement, and in many cases the actual additional insured endorsement must be provided along with the certificate. For guidance on assembling compliant documentation packages, see our page on Certificate of Insurance Requirements Construction.

COI Compliance for Michigan Construction Projects

Collecting a certificate of insurance before a subcontractor starts work is only the beginning of a compliant COI management process. True compliance in Michigan requires a structured system for verifying, storing, and monitoring certificates throughout the lifecycle of every project. General contractors operating on multiple simultaneous job sites — a common situation for mid-size and large GCs in the Detroit Metro area, West Michigan, or the Upper Peninsula — face the challenge of tracking dozens or even hundreds of subcontractor certificates at any given time.

A compliant COI process in Michigan should include the following core steps:

Pre-Qualification and Document Collection: Before issuing a subcontract or notice to proceed, require every subcontractor to submit a current COI meeting your project’s specified coverage requirements. The certificate should be issued on the standard ACORD 25 form and must list all required coverages, limits, policy effective and expiration dates, and the named insured matching the contracting entity. Do not accept certificates issued to a different legal entity than the subcontractor signing the contract — a common issue in Michigan with sole proprietors and LLCs that carry policies under different names.

Coverage Verification: Do not assume a COI is compliant simply because it was submitted. Verify that the listed limits meet your contract requirements, that the policy periods are current, that additional insured endorsements are properly reflected, and that the certificate holder information is correct. Michigan GCs should also check whether the workers’ compensation section reflects Michigan jurisdiction, as out-of-state subcontractors sometimes carry policies not endorsed for Michigan operations.

Ongoing Monitoring and Renewal Tracking: Policies expire. A COI that was valid when a subcontractor started work in January may expire in June while the project is still active. Michigan’s construction season — particularly for outdoor and infrastructure work — often spans six to nine months, creating significant risk of mid-project COI lapses. Building a tracking system that flags upcoming expirations and requires subcontractors to submit renewed certificates before their current ones lapse is essential. Many Michigan GCs are increasingly turning to digital COI management platforms to automate this process.

Record Retention: Michigan contract law and general statute of limitations considerations mean that COI records should be retained well beyond project completion — particularly given the completed operations liability exposure that can extend for years after a building or infrastructure project is finished. Maintain digital records of all COIs collected, along with timestamps of when they were received and verified. Our Contractor Compliance Documentation resource provides additional guidance on building a defensible record-keeping system.

Michigan public projects add another layer of compliance requirements. Projects funded through the Michigan Department of Transportation, the Michigan Economic Development Corporation, or federal programs administered through Michigan state agencies often include specific insurance exhibit requirements that go beyond standard commercial contract language. Public owners may require wrap-up insurance programs (OCIPs or CCIPs) on large projects, which affects how individual subcontractor COIs are structured and what coverages need to be maintained outside the wrap.

How Michigan Contractors Track Subcontractor COIs

The methods Michigan general contractors use to track subcontractor COIs have evolved significantly over the past decade. Historically, COI management was handled through paper files, spreadsheet logs, and email inboxes — methods that are error-prone and difficult to scale as project volume grows. Today, Michigan GCs of all sizes are adopting more systematic approaches to keep pace with the compliance demands of a busy construction market.

Spreadsheet-Based Tracking: Many smaller Michigan GCs still rely on Excel or Google Sheets to track COI expiration dates across their subcontractor rosters. While this approach can work for firms with a limited number of active subcontractors, it requires manual updates and is vulnerable to human error. A certificate that expires while the spreadsheet entry goes un-updated represents a real liability gap.

Shared Document Drives: Google Drive and SharePoint folders are commonly used in Michigan construction offices to store COI PDFs. While this improves accessibility compared to paper files, it does not solve the tracking and alerting problem — someone still has to manually review the documents to catch upcoming expirations.

Project Management Software Integration: Michigan GCs using platforms like Procore, Buildertrend, or Sage have access to some built-in COI tracking features, but these are often limited and not purpose-built for the nuanced requirements of insurance compliance verification.

Dedicated COI Management Platforms: Many Michigan contractors use automate COI expiration tracking tools to stay ahead of lapses across active projects. These platforms are designed specifically for construction COI compliance and offer features like automated expiration alerts, digital certificate collection portals, coverage gap flagging, and audit-ready reporting. For Michigan GCs managing multiple simultaneous projects — a renovation in Detroit, a road project in Flint, a commercial build in Kalamazoo — this level of automation can be the difference between a compliant operation and a costly liability exposure. Learn more about building a robust verification process with our Subcontractor Insurance Verification guide.

Common COI Compliance Challenges in Michigan

Even experienced Michigan general contractors encounter recurring challenges in their COI compliance programs. Understanding these common pitfalls is the first step toward addressing them proactively.

Certificate Fraud and Misrepresentation: One of the most serious issues in Michigan’s construction industry — and nationally — is the submission of fraudulent or altered certificates of insurance. A subcontractor under financial pressure may submit a COI showing active coverage when a policy has actually lapsed or been cancelled. Michigan GCs should implement a verification step that involves contacting the subcontractor’s insurance agent or broker directly to confirm coverage, especially before large scopes of work begin. ACORD certificates themselves are not guarantees of coverage — they are representations by the insurance agent at the time of issuance.

Policy Cancellation Gaps: Michigan insurance policies can be cancelled mid-term for non-payment of premiums. While most contracts require subcontractors to notify the certificate holder of cancellation (and many COIs include a 30-day cancellation notice provision), these notifications are not always reliable. Automated tracking platforms help close this gap by proactively monitoring expiration dates rather than relying solely on carrier notifications.

Out-of-State Subcontractors Working in Michigan: Michigan’s construction market regularly attracts specialty subcontractors from Ohio, Indiana, Wisconsin, and Illinois. Out-of-state firms may carry insurance policies that are not endorsed for Michigan operations, particularly for workers’ compensation. Michigan GCs should specifically verify that workers’ comp coverage extends to Michigan for any out-of-state subcontractor, and should ensure that Michigan’s no-fault auto requirements are addressed in commercial auto policies carried by subcontractors who will operate vehicles on Michigan job sites.

Mismatched Named Insured Entities: Michigan’s construction sector includes a large number of small and mid-size firms that operate under multiple entity names, DBAs, or related LLCs. A COI submitted under “Smith Electrical LLC” when the subcontract is with “Smith Electric Services Inc.” is a compliance gap that creates coverage uncertainty. Always verify that the named insured on the COI exactly matches the legal entity on the subcontract.

Insufficient Coverage Limits on Specialty Trades: Michigan’s construction market includes a wide range of specialty trades — roofing, electrical, mechanical, demolition, and hazardous material abatement — that may carry higher risk profiles requiring elevated insurance limits. Roofing subcontractors, for example, may face higher general liability limits requirements due to fall hazards, while demolition and abatement subcontractors may need specialized pollution liability coverage. Template COI requirements that don’t account for trade-specific risk can leave GCs with inadequately insured subcontractors on high-risk scopes of work.

Audit Unpreparedness: Michigan GCs working on bonded public projects or projects with institutional lenders may face insurance compliance audits. Disorganized COI records — missing certificates, expired documents, or incomplete coverage verifications — can jeopardize project financing, bonding capacity, and owner relationships. Proactive audit preparation, as outlined in our Construction Insurance Audit Preparation guide, is a critical component of a mature compliance program.

Construction Risk Management in Michigan

COI compliance exists within the broader context of construction risk management, and Michigan’s unique regulatory and market environment shapes the risk landscape that GCs navigate on every project. Understanding the full risk picture helps Michigan contractors appreciate why subcontractor COI requirements are not bureaucratic box-checking, but genuine tools for financial protection.

Michigan’s construction industry is one of the most active in the Midwest. The Detroit Metro area continues to see significant commercial, mixed-use, and industrial development, while state and federal infrastructure investment is driving major road, bridge, and utility projects across the Lower and Upper Peninsulas. The Michigan Economic Development Corporation’s transformational projects — including electric vehicle manufacturing plants and associated supply chain facilities in communities like Lansing, Holland, and Sault Sainte Marie — are bringing large, complex construction programs with sophisticated insurance and compliance requirements. General contractors bidding and winning work on these projects must demonstrate robust subcontractor compliance programs as part of their project management capabilities.

Michigan’s climate also contributes to the risk environment. Harsh winters create frozen ground conditions, ice and snow hazards on job sites, and seasonal construction windows that compress project schedules. Weather-related accidents and property damage claims are more frequent in Michigan than in warmer states, which underscores the importance of ensuring that every subcontractor on a job site carries adequate coverage throughout the project — including during winter slowdowns when some subcontractors may allow coverage to lapse.

Michigan’s legal environment is another risk factor for GCs to understand. Michigan is not a pure comparative negligence state in all contexts — its construction defect and tort law landscape creates specific exposures that make completed operations coverage and contractual liability insurance provisions especially important. Michigan’s anti-indemnity statutes impose limitations on certain indemnification clauses in construction contracts, which means insurance — not contractual shifting — is often the primary mechanism for risk allocation between GCs and subcontractors.

For Michigan GCs looking to build a comprehensive approach to construction risk management that integrates COI compliance with broader insurance program management, our Construction Insurance Compliance resource provides a detailed framework. Strong COI management is a cornerstone of that framework — but it works best when embedded in a culture of systematic risk oversight that extends from pre-qualification through project closeout.

Frequently Asked Questions

What insurance coverage is typically required from subcontractors on Michigan construction projects?

Michigan subcontractors are generally required to carry commercial general liability insurance (commonly $1 million per occurrence and $2 million aggregate), workers’ compensation insurance as mandated by Michigan’s Workers’ Disability Compensation Act, commercial auto liability, employer’s liability, and in many cases umbrella or excess liability coverage. Specific limits depend on the project size, contract terms, and the general contractor’s risk management policies. Specialty trades may also need professional liability or pollution liability coverage.

Is workers’ compensation insurance mandatory for subcontractors in Michigan?

Yes. Under Michigan’s Workers’ Disability Compensation Act (Act 317 of 1969), virtually all employers with one or more employees working 35 or more hours per week, or with three or more employees at any time, must carry workers’ compensation insurance. General contractors in Michigan can be held liable for injuries to employees of uninsured subcontractors, making COI verification of workers’ comp coverage a legal and financial necessity — not just a contractual formality.

How often should Michigan general contractors request updated COIs from subcontractors?

Best practice in Michigan is to collect a current COI before any subcontractor begins work on-site, and then actively monitor for policy renewals and expirations throughout the project duration. Since most policies renew annually, long-term Michigan projects — particularly multi-year infrastructure or large commercial builds — require proactive mid-project tracking. Automated COI management platforms can alert contractors when certificates are approaching expiration, eliminating reliance on subcontractors to self-report coverage renewals.

What does it mean to be listed as an additional insured on a Michigan subcontractor’s COI?

Being listed as an additional insured on a subcontractor’s policy means the general contractor or project owner receives direct coverage under that policy for claims arising from the subcontractor’s work. In Michigan, additional insured endorsements are a standard requirement in most commercial construction contracts. While the COI should reflect the additional insured status, the actual endorsement on the underlying policy is the legally binding document — GCs should request copies of the endorsement, not just rely on the certificate notation.

Can a Michigan general contractor be held liable if a subcontractor lacks proper insurance?

Yes. Michigan law and standard construction contract frameworks can expose general contractors to significant liability if an uninsured or underinsured subcontractor causes property damage, bodily injury, or fails to compensate injured workers. Michigan’s Workers’ Disability Compensation Act specifically creates mechanisms by which GC liability can be triggered for uninsured subcontractor employees. This is why thorough COI collection, verification, and ongoing monitoring is not just a best practice — it is a financial and legal necessity for Michigan GCs operating in today’s risk environment.

Manage COI Compliance Across Michigan Projects

Subcontractor COI requirements in Michigan are not a one-time administrative task — they are an ongoing compliance obligation that follows every project from the first subcontract issued to the final punch list and beyond. General contractors and construction managers who build systematic, technology-supported COI compliance programs are better positioned to protect their companies from uncovered claims, win work with sophisticated owners, and manage the complexity of multi-project operations across Michigan’s diverse and active construction market.

Whether you are a GC managing a single commercial project in Grand Rapids or a construction management firm overseeing a portfolio of projects across southeast Michigan and the Upper Peninsula, the fundamentals of strong COI compliance are the same: collect certificates before work starts, verify coverage against your contract requirements, monitor for expirations throughout the project, and maintain organized records that are available when you need them — whether for a routine review or a formal insurance audit.

Our team is here to help Michigan contractors build and improve their subcontractor COI compliance programs. Contact us using the form below to discuss your specific needs, project types, and the compliance challenges you are currently facing. We will work with you to identify the right combination of process, documentation, and technology tools to keep your projects protected and your compliance program audit-ready.