We Found a Dog on the Health Plan. Here’s What It Was Costing Us

This site contains affiliate links. View the disclosure for more information.

A dependent eligibility audit checks every dependent on your health plan against your plan’s own eligibility rules. Audits typically find 3% to 10% of covered dependents don’t actually qualify. Removing them lowers claims cost without cutting a single benefit from your eligible employees. I ran one. We found a dog.

https://youtu.be/nAyiRcXKiFw

At one company, I implemented a dependent verification program from start to finish. No one had ever checked. Enrollment ran on the honor system: you typed in a name, checked a box that said “dependent,” and coverage started.

Here’s what we found when we finally asked for documents.

Parents enrolled as dependents. Ex-spouses still riding the plan years after the divorce. And one dependent who could not produce a birth certificate for a very good reason: he was a dog. An actual dog. Enrolled on an employer-sponsored health plan, sitting in the eligibility file, getting sent to the carrier every month.

Nobody committed a heist. Most of it was misunderstanding. Somebody thought “dependent” meant “anyone who depends on me.” Somebody forgot to remove an ex after the divorce because nothing forced them to. And somebody, somewhere, decided the dog was family. Fair. But not covered. The year after we cleaned it up, claims dropped and total plan cost came down by $2 million. Two million dollars. Not from cutting benefits. Not from raising employee premiums. Not from switching to a worse plan. Just from making sure the people on the plan were supposed to be on the

How does a dog end up on a health plan?

The same way an ex-spouse does: nobody checks.

Most enrollment systems will accept whatever name you type. If your company has never required documentation — a birth certificate, a marriage certificate, court paperwork — then your eligibility file is a collection of things employees believed, not things anyone verified.

And beliefs drift. A stepchild ages out. A divorce finalizes and life gets busy. A parent moves in and it feels right to add them. None of these people show up waving a flag. They just sit in your file, generating claims, month after month, year after year.

The honor system isn’t a system. It’s a hope.

What does an ineligible dependent actually cost?

Here’s the math that made my leadership sit up.

As of 2026, industry audit data consistently finds 3% to 10% of covered dependents are ineligible (Mercer, WEX, BMI Audit Services). The average annual cost per covered dependent runs roughly $4,500 to $7,000, depending on whose data you use (Mercer; BMI).

So run your own numbers longhand. Say you cover 500 dependents. Take the low end: 3% ineligible is 15 people. At $5,000 each, that’s $75,000 a year — every year — paying claims for people your plan document says shouldn’t be there. At 10%, you’re at $250,000. My company’s cleanup was worth $2 million the following year. And that’s just the claims. The scarier cost is the one that shows up later.

What goes wrong if you never check?

Three ways an unchecked eligibility file bites you:

• Stop-loss denial. If you’re self-funded and a big claim comes in for someone who was never eligible, your stop-loss carrier can deny it. Now the plan — meaning your employer — eats the whole claim.
• Fiduciary exposure. Under ERISA, the plan sponsor has a duty to run the plan by its own terms. That includes eligibility. “We never checked” is not a defense.
• A brutal moment for the employee. An ineligible dependent who racks up claims can end up with denied coverage, clawed-back claims, or worse. The kindest time to catch this is before the hospital visit, not after.

How do you run a dependent eligibility audit?

You don’t need a six-figure consulting engagement to start. You need a plan document, a communication plan, and a spine. Here’s the order I used.

Step 1 — Pull the definition from your plan document

Not from memory. Not from “how we’ve always done it.” Your plan document defines who counts as an eligible dependent: spouse, children to a specific age, disabled dependents, maybe domestic partners. That definition is your ruler. Everything gets measured against it.

Step 2 — Open with an amnesty window

Before you ask for a single document, give people a no-questions-asked window to remove anyone who doesn’t qualify. Two to four weeks. No penalties, no awkward conversations, no HR file notes. Most ineligible dependents come off right here, voluntarily, because most people weren’t trying to cheat — they just didn’t know the rules. Lead with grace. It works better and it protects morale.

Step 3 — Require documents for everyone who stays

Marriage certificate for a spouse. Birth certificate for a child. Court orders for guardianship. Everyone with a covered dependent participates — no exceptions, including executives. The fastest way to poison an audit is to let some people skip it.

Step 4 — Set a real deadline with a real consequence

Communicate the deadline clearly, send reminders, and be explicit: dependents who aren’t verified by the deadline come off the plan. Then follow through. A deadline nobody enforces teaches everyone the next deadline is optional Step 5 — Make verification permanent

The one-time audit cleans up the past. Ongoing verification protects the future: require documents at new hire enrollment, at every qualifying life event, and spot-check at open enrollment. Otherwise you’re scheduling this same cleanup for three years from now.

Where do you start this week?

1. Read your plan document’s dependent eligibility section. Today. Know your own ruler.
2. Pull a dependent census from your ben admin system. Just look at it. Aged-out kids and duplicate records jump off the page.
3. Grab my free Post-OE Audit field guide + tracker — it walks you through auditing what’s actually in your systems, phase by phase. → Post OE Audit
4. Talk to your broker about a formal verification program. Ask what a document-based audit would look like for your population and whether your stop-loss contract has eligibility language you should read twice.

Want a second set of eyes on your whole benefits operation? That’s what my Benefits Operations Audit is for — email me at ekirby@ericakirby.com and tell me what’s keeping you up at night.

This is the plain-English version to get you oriented — not legal or tax advice. Before you act on any of it, confirm the specifics with your broker, your benefits counsel, or your filing software. My job here is to make it make sense, not to be your lawyer.

---

FAQ

Q: Is a dependent eligibility audit legal? A: Yes. Under ERISA, the plan sponsor is actually required to run the plan by its own eligibility terms. Verifying dependents is part of doing that job. Just apply it to everyone equally and communicate it clearly.

Q: How many dependents are usually ineligible? A: As of 2026, audit vendors consistently report finding 3% to 10% of covered dependents ineligible on plans that have never been audited. The most common finds are ex-spouses and children past the plan’s age limit.

Q: What documents prove a dependent is eligible? A: Typically a marriage certificate for a spouse, a birth certificate or adoption paperwork for a child, and court orders for guardianship. Your plan document controls exactly what counts, so start there.

Q: Will employees get in trouble for having an ineligible dependent? A: The best-practice approach starts with an amnesty window: a set period to remove ineligible dependents with no questions asked and no penalties. Most removals happen voluntarily during that window because most cases are misunderstandings, not fraud.

This site contains affiliate links. View the disclosure for more information.