Certificate of insurance (COI)

By James Grokman, CEO, TapeAndFloat · Updated 2026-10-28

A certificate of insurance is a one-page summary from your insurance agent showing your policies, limits and dates. GCs usually ask for one, often naming them as additional insured, before you start work.

Why it matters on a drywall job

An expired or missing COI can hold up your start or your payment.
Tracking renewal dates and sending updated COIs ahead of time avoids that.

Related guides and tools

Weekly office checklist
Sub paperwork: COIs and lien waivers (GC guide)
All glossary terms

TapeAndFloat helps drywall and tape-and-float contractors keep up with the office side: bids, change orders, pay apps and follow-ups. Free 60-day pilot. If you stay on, we agree on the price with you up front.

Join the free pilot

¿Prefiere español? Certificado de seguro (COI).