---
title: "Certificate of insurance (COI) | Drywall Glossary"
url: https://tapeandfloat.com/glossary/certificate-of-insurance.html
language: en
author: James Grokman, CEO, TapeAndFloat
updated: 2026-10-28
---

# Certificate of insurance (COI)

**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](https://tapeandfloat.com/office-checklist.html)
- [Sub paperwork: COIs and lien waivers (GC guide)](https://gc.tapeandfloat.com/guides/sub-paperwork-coi-lien-waivers.html)
- [All glossary terms](https://tapeandfloat.com/glossary/)

---

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](https://tapeandfloat.com/office-assistant.html)**

_¿Prefiere español? [Certificado de seguro (COI)](https://tapeandfloat.com/es/glosario/certificado-de-seguro.html)._