What is COI tracking?

COI tracking, defined

A certificate of insurance (COI) is a one-page document—almost always an ACORD 25 form—that proves a business carried specific insurance coverage on a specific date. COI tracking is everything you do with those certificates after you ask for them: collecting each one, reading it, checking it against your insurance requirements, and watching its expiration dates so you can request a renewal before the policy lapses.

The key word is *ongoing*. A certificate is only accurate the day it’s issued. A subcontractor who was fully insured in January can have a cancelled or downgraded policy by June. Tracking is what turns a pile of one-time PDFs into continuous proof that everyone working under you is insured for the entire time they’re on the job.

Why COI tracking matters

When a subcontractor causes property damage or injures someone, you want their insurance to respond—not yours. That only happens if their coverage is active, meets your limits, and names your company as an additional insured. COI tracking is how you confirm all three before the loss, not after.

• Risk transfer: a compliant COI pushes liability to the subcontractor’s insurer instead of yours.
• Claim protection: if a sub’s policy lapsed mid-project, their carrier can deny the claim—leaving you exposed.
• Contract & audit compliance: owners, lenders, and your own insurer often require proof you verify downstream coverage.
• Premium impact: uninsured subcontractor losses can flow onto your loss runs and raise your future premiums.

What gets tracked on each certificate

Verifying a COI means checking specific fields against the requirements in your subcontract—not just filing the PDF. At a minimum, tracking covers:

• Coverage types present—general liability, auto, workers’ compensation, and umbrella/excess where required.
• Limits that meet or exceed your minimums on each line of coverage.
• Endorsements—additional insured, waiver of subrogation, and primary and non-contributory status.
• Effective and expiration dates that cover the subcontractor’s full scope of work.
• Certificate holder details listing your company with the correct name and address.

Manual tracking vs. COI tracking software

Most contractors start by tracking COIs in a spreadsheet or a folder of emails. That works for a handful of subs, but it can’t read a certificate, can’t flag a missing endorsement, and won’t warn you before a policy expires. Dedicated software automates exactly those gaps.

For a deeper breakdown, see Excel vs. COI tracking software or the full best COI tracking software comparison.

Who needs to track COIs?

Anyone who hires other insured businesses and can be held liable for their work. In construction that’s general contractors tracking subcontractors, but the same discipline applies to property managers tracking vendors and facility managers tracking service providers.