COI tracking in Excel vs software: when a spreadsheet is enough
Updated October 2026. Written for US construction and property firms.
You do not need software to track certificates of insurance. Plenty of small firms do fine with a spreadsheet. This page tells you honestly where the line is, so you can decide for yourself.
Is Excel good enough for COI tracking?
For a handful of subs, yes: a sheet with expiry dates and conditional formatting does the job. It breaks down past a few dozen vendors because it cannot send renewal reminders, chase subs automatically, or flag coverage gaps, and missed renewals happen silently.
If you are on the "handful of subs" side of that line, our free COI tracking spreadsheet has the color rules already built in.
When is a spreadsheet enough for tracking certificates?
A spreadsheet is enough when you have fewer than about 10 to 15 active subs. It also works when the same person checks it every week without fail, and when most subs renew at different times of year. If one missed renewal would not hurt you much, a free spreadsheet is a sensible choice.
- You use the same few subs on most jobs.
- One person owns the list and has the time to keep it.
- Your contracts do not require endorsements you have to collect and file.
What breaks when you track COIs in Excel?
The spreadsheet breaks at the follow-up, not at the data entry. A spreadsheet cannot email anyone. It does not notice that a date turned yellow. It does not remember who you already chased. Everything depends on one person opening the file. When that person is busy or on leave, renewals lapse silently.
A spreadsheet is fine with eight subcontractors. At thirty it becomes the bottleneck. The most common failure points are these.
- Chasing. Each renewal takes two or three emails. At thirty subs with two or three policies each, that is a lot of chasing.
- Typing. Someone has to read every ACORD 25 certificate and copy the dates by hand. One wrong digit hides a lapse.
- Mid-term cancellations. A sub can hand you a valid COI on Monday and cancel the policy on Friday. The spreadsheet still shows green.
- The audit. At your premium audit, the insurer asks for a certificate for every sub you paid. Digging them out of an inbox takes days.
What does COI tracking software do that Excel cannot?
COI tracking software reads the certificate for you. It flags what is expiring and emails the sub automatically before the policy lapses. It keeps every certificate and every reminder in one place. That means anyone in the office can see the status and pull a full report before the audit, without asking the one person who knows.
| Task | Spreadsheet | CoiPatrol |
|---|---|---|
| Cost | Free | Free to 10 subs, $49 a month to 50 |
| Getting dates off the certificate | Typed by hand | Read from the PDF, you confirm |
| Red, yellow, green status | Yes, with conditional formatting | Yes, built in |
| Renewal reminders to subs | You send them yourself | Sent automatically at 30, 14 and 7 days |
| Record of who you chased | Only if you log it | Every email logged |
| Weekly summary for the boss | No | Yes |
| Report for the auditor | The sheet itself | One-click export |
| Setup time | About 10 minutes | About 10 minutes |
Some things neither one does. Neither one checks with the insurance company that a policy is still active. Enterprise platforms offer that, at enterprise prices. See our comparison of COI tracking software.
How much does it cost to switch from Excel to COI software?
It depends on the tool. Enterprise platforms are quote-only and commonly cost several hundred dollars a month, often with onboarding fees. Small-business tools run roughly $29 to $99 a month. CoiPatrol is free for up to 10 subcontractors, $49 a month for up to 50, and $99 a month for up to 150.
Compare that to the cost of one gap. If a sub without workers' comp is on your books at premium audit, the carrier can add what you paid them to your own premium. See our pricing page for the details.
How do I track subcontractor certificates of insurance?
Collect a COI before the sub gets site access, log the coverage types, limits, and expiration dates, verify them against your contract requirements, and request renewals about 30 days before expiry. A spreadsheet works up to roughly 10 to 15 active subs. Past that, dedicated tracking software prevents missed renewals.
How do I move from a spreadsheet to COI software?
Start with your active subs only. Gather the newest certificate for each one, as PDFs. Upload them and confirm the dates the software reads. Add each sub's contact email so reminders reach the right person. Most small firms finish in an afternoon. Keep the old spreadsheet as an archive.
- Filter your spreadsheet to subs working now or in the next 90 days.
- Find the newest certificate for each. Ask for a fresh one if it is missing or expired.
- Upload the PDFs and check each one.
- Turn on reminders.
Try it with your real certificates
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