Excel vs. COI tracking software

The short answer

Tracking certificates of insurance in Excel or Google Sheets works—up to a point. A spreadsheet is genuinely fine when you have a few subcontractors on one project and low liability exposure. What a spreadsheet cannot do is read a certificate, verify it against your requirements, or tell you a policy is about to expire. Those are the three jobs COI tracking actually exists to do, and they’re exactly where a spreadsheet quietly fails as you add more subs.

This guide is a decision, not a sales pitch. We’ll cover where a spreadsheet earns its keep, the specific ways it breaks at scale, the real (mostly hidden) cost of staying on one, and what dedicated software adds. One thing that used to be a deciding factor no longer is: modern tools like Wardly are free, so the old “software costs money, spreadsheets are free” argument doesn’t hold anymore.

When a spreadsheet is genuinely fine

A spreadsheet is a reasonable, honest choice in a narrow set of conditions. If all of these are true, don’t let anyone talk you out of Excel:

• You’re tracking a small, stable number of subcontractors—roughly under 10 to 15—on a single project.
• One person owns the file and enters every certificate, so there’s no version or ownership confusion.
• Your liability exposure is modest and your requirements are simple (a general liability limit, maybe workers’ comp).
• You’re disciplined about reading each ACORD 25 by hand and setting your own calendar reminders for renewals.

Spreadsheets have real strengths: they’re familiar, infinitely flexible, free, and require zero onboarding. Everyone on a jobsite trailer already knows how to use one. If you want to build one the right way, we have a COI tracking spreadsheet template with the exact columns to include. For a handful of subs, a well-built sheet with conditional formatting on expiration dates can carry you a long way.

The specific ways a spreadsheet breaks at scale

The problem isn’t that spreadsheets are bad software—it’s that COI tracking is a data-extraction and monitoring job, and a spreadsheet does neither. Here’s where it fails, in the order most contractors hit it:

It can’t read the ACORD 25

Every certificate arrives as a PDF—almost always an ACORD 25 form. A spreadsheet can’t open it, can’t find the general liability limit, and can’t tell you whether the dates are current. Someone has to read each form and type the fields into cells by hand. That’s slow, and it’s where errors are born.

Manual entry means silent errors

Transposed limits, mistyped dates, a policy logged under the wrong sub—these mistakes don’t announce themselves. Manual COI review is estimated to miss a meaningful share of coverage deficiencies, and a spreadsheet has no way to catch its own typos. The cell says the sub is covered; the certificate says otherwise; nobody knows until a claim.

It can’t verify endorsements

A certificate that lists the right limits can still be non-compliant if it’s missing an additional insured endorsement or a waiver of subrogation. Those live in the endorsement forms attached to the policy, not in a tidy field on the ACORD 25. A spreadsheet can hold a “yes/no” column, but it can’t actually confirm the endorsement exists—someone has to read the attachments and decide. See COI grading for how software handles this automatically.

No expiration alerts—only a date you have to remember to check

This is the one that causes real losses. A certificate is only accurate the day it’s issued; policies get cancelled, downgraded, or simply expire mid-project. A spreadsheet will happily keep showing a green cell for a policy that lapsed weeks ago, because the sheet only knows what you last typed. Automated expiration tracking is the single feature contractors miss most on a spreadsheet.

Version, ownership, and audit-trail risk

Once more than one person touches the file, entries get overwritten, dates get transposed, and the “master” copy multiplies into three slightly different versions. Worse, there’s no audit trail: no record of who changed what, when, or why. When an owner, lender, or your own insurer asks you to prove you verified downstream coverage, a spreadsheet can’t show its work.

The true cost of a “free” spreadsheet

The reason a spreadsheet feels free is that its costs are hidden. There are two of them.

Labor. Someone reads every certificate, types every field, chases every renewal, and re-checks the file before every audit. On a portfolio of 50+ subcontractors that’s easily several hours a week of skilled admin time—time that isn’t free just because it isn’t a line item on an invoice.

Risk. This is the expensive one. If a subcontractor’s policy lapsed and their carrier denies a claim, the loss can flow to your insurance instead of theirs—raising your future premiums, or worse. A spreadsheet that showed “covered” when the policy was dead doesn’t just cost admin hours; it can cost you the entire risk-transfer protection you thought your subcontracts gave you. One missed expiration can dwarf years of software fees.

What dedicated software actually adds

Good COI tracking software isn’t a fancier spreadsheet—it does the parts a spreadsheet structurally can’t. In practice that means:

• Collection without chasing. Subcontractors upload their certificate through a no-login link—no accounts, no email tag.
• Automatic reading. The software parses the ACORD 25 and pulls coverage types, limits, and dates for you, so there’s no manual data entry.
• Verification against your rules. Each certificate is graded against your requirements—Wardly assigns an A–F grade—including whether required endorsements are present.
• Expiration monitoring. The system watches every policy date and alerts you before coverage lapses, instead of relying on you to check.
• A real audit trail. Every certificate, grade, and change is stored and time-stamped, so you can prove compliance to an owner or lender on demand.

For a full breakdown of options, see the best COI tracking software roundup or compare tools side by side. And if you want a strictly product-level view of a sheet vs. a platform, our COI tracking spreadsheet comparison puts them head to head.

Excel vs. COI tracking software, compared

Here’s the honest side-by-side across the dimensions that actually decide the outcome:

The one place a spreadsheet still wins is total flexibility—you can add any column you like. But for the core job of proving your subs are insured, every row that matters tilts toward software.

How to decide

Use this rule of thumb. If you have fewer than about 15 subcontractors on a single project, one owner of the file, and low exposure, a well-built spreadsheet is fine—start with our template and be disciplined about renewals.

If you’re past that—multiple projects, more subs, real liability, or more than one person touching the records—move to software. Since cost is no longer the barrier, the practical question isn’t “can I afford to switch?” but “why am I still doing by hand what software does automatically?” See how general contractors track insurance end to end, or read how COI tracking works for the full workflow.