What Is a Certificate of Insurance and Why Tree Services Need One for Every Job

What Is a Certificate of Insurance and What Does It Include?

A Certificate of Insurance, commonly called a COI, is a one-page document issued by your insurance carrier or broker that summarizes your active coverage. It lists your policy types, policy numbers, effective dates, coverage limits, and the name of the insured business. The standard form used across the insurance industry is the ACORD 25 certificate, which is recognized nationwide and accepted by virtually every property owner, general contractor, and municipality.

For tree service companies, a COI is far more than routine paperwork. It is the document that opens doors to contracts, job sites, and client relationships. Tree care operations carry inherently high risk. Workers climb to heights of 60 feet or more, operate chainsaws and chippers rated at 1,000-plus RPM, and drop limbs weighing several hundred pounds near structures, vehicles, and power lines. A single mishap can result in six-figure property damage or catastrophic bodily injury. The COI gives the hiring party confidence that your general liability, workers compensation, and commercial auto policies are in force and that they will not be left holding the financial responsibility if something goes wrong.

The ACORD 25 form includes dedicated sections for each major coverage line. Here is what each section communicates to the certificate holder:

Why Do Property Owners and Contractors Require a COI Before Work Begins?

Most property owners, general contractors, municipalities, and commercial property managers will ask for a COI before allowing any tree work to begin. This is standard practice across the arboriculture industry because the financial exposure from tree care accidents is enormous. A tree falling on a house can generate $200,000 or more in structural damage claims. A worker injured in a fall without workers compensation coverage can file a civil lawsuit with no statutory cap on damages.

The COI serves as verification that the tree service has transferred these risks to an insurance carrier. Without it, the hiring party has no way to confirm coverage exists. Many commercial contracts go further by specifying minimum limits. Municipal tree trimming programs commonly require $2 million in general liability, $1 million in commercial auto, and statutory workers compensation. Utility line clearance contracts may demand $5 million or more in total liability coverage through a combination of general liability and umbrella policies.

Homeowner awareness has also grown significantly. Residential customers are increasingly asking for proof of insurance before hiring a tree company, partly driven by stories of unlicensed and uninsured tree crews causing major property damage with no recourse for the homeowner. Carrying proper insurance and being able to prove it with a COI sets your company apart from fly-by-night operations that undercut pricing by skipping insurance altogether.

What Is an Additional Insured Endorsement and When Do You Need One?

One of the most important features of a COI is the Additional Insured endorsement. When a property manager or general contractor requires you to name them as an additional insured on your general liability policy, they gain certain protections under your policy if a claim arises from your work. This is extremely common in commercial tree care. Municipal contracts almost universally require it, and many residential property management companies have followed suit.

Your insurance agent can add additional insured endorsements quickly, often within 24 hours, but you need to plan ahead. Showing up to a job site without the proper endorsement listed on your COI can get you turned away on the spot. Some contracts also require a waiver of subrogation, which prevents your insurance carrier from seeking reimbursement from the certificate holder after paying a claim. Both endorsements are standard requests, and your agent should be familiar with adding them.

For tree service companies classified under NCCI code 0106, the workers compensation section of the COI is particularly important. Tree trimming and removal carries one of the highest experience modification rates in the construction and service trades, and hiring parties want to verify that your workers comp policy is active and that your limits meet their contract requirements.

When Will You Need to Produce a COI Quickly?

There are several situations where speed matters. The most common is winning a new contract. Whether you are bidding on a municipal tree trimming program, a utility line clearance project, or a commercial property maintenance agreement, the COI will be one of the first documents requested after your bid is accepted. Delays in producing a COI can cause you to lose the contract to a competitor who responds faster.

Emergency storm damage work is another critical scenario. After a major storm event, property owners and insurance adjusters are scrambling to get trees off structures, clear roadways, and restore access. They need proof of insurance before authorizing work, and the companies that can produce a COI within minutes rather than days will capture the bulk of emergency revenue.

How Should You Manage COIs for Subcontractors?

Subcontractor management is an area where COIs play a critical role that many tree service owners overlook. If your tree service hires subcontractors, such as crane operators, stump grinding specialists, or additional climbing crews, you should be collecting COIs from every sub before they set foot on a job site.

If a subcontractor causes damage or sustains an injury and they lack proper insurance, the liability can flow uphill to your company. This is a common and expensive mistake in the tree care industry. Your own insurance carrier may also require proof that all subcontractors carry adequate coverage as a condition of your policy. Failing to collect and maintain current COIs from subs can result in audit penalties and coverage disputes.

Maintaining a current COI file for every subcontractor you use is not optional. It is a basic risk management practice. Create a subcontractor onboarding checklist that includes COI collection, verify that their coverage limits meet your contract requirements, and set calendar reminders to request updated certificates before their policies expire.

How Do You Set Up a Streamlined COI Process?

The process for obtaining a COI is straightforward. You contact your insurance agent or broker, specify the job or contract requiring the certificate, provide the name and address of the certificate holder, and indicate whether an additional insured endorsement is needed. Many agencies now offer online portals where you can generate standard COIs on demand, which is a significant advantage for tree service companies that take on multiple jobs per week.

Some carriers also offer automated certificate tracking systems that notify you when a certificate is about to expire, ensuring you never lapse on a requirement. If your tree service does not currently have a streamlined process, here are the steps to establish one.

First, ask your insurance agent about setting up an online certificate portal. Second, create a checklist for new contracts that includes COI requirements, additional insured endorsements, and waiver of subrogation requests. Third, build the habit of collecting certificates from every subcontractor before work begins. Fourth, set up a tracking system, whether a spreadsheet or a dedicated platform, to monitor expiration dates for both your own certificates and those of your subcontractors.

It is worth noting that a COI is not a contract and does not alter your policy terms. It is simply evidence that coverage exists as of the date the certificate is issued. Certificates can become inaccurate if a policy is canceled or materially changed, which is why many hiring parties require updated COIs at regular intervals. Keeping your COI current and readily available demonstrates professionalism and reliability, two qualities that directly influence your ability to win and retain tree care contracts.