Workers compensation insurance explained, including experience mod and audit

Written by Mark Rodgers, President and Founder, Trailstone Insurance Group

Workers compensation is the one commercial policy most business owners think they understand and most business owners get wrong. Not because they are careless, but because three things inside a workers comp policy quietly drive your premium up or down for years, and almost no one explains them clearly.

Today we are going to talk about your experience mod, your annual audit, and what to do in the first 10 minutes after a workplace injury, because those three things matter more than the price you get quoted at the start. This is part 3 of our Commercial Insurance 101 series, and there is an accompanying video on our YouTube channel if you would rather watch.

Here's the Short Answer

Workers compensation pays medical bills and lost wages for an employee who gets hurt on the job, and it protects you, the business owner, from being sued personally for that injury. In most states, it is required if you have even one employee. Three things drive your workers comp premium more than the rate itself: your experience modification rate, called your mod or EMR, which is essentially a credit score for your claims history; your annual audit, which trues up your premium based on actual payroll and classifications; and how quickly and correctly you handle a claim in the first hour after an injury. Get those three right and your workers comp program will work for you, not against you.

What Workers Compensation Actually Does

Quick foundation, then we will go deeper. Workers comp covers two things at once. It pays medical bills and lost wages for an employee who gets hurt on the job, and it protects you, the business owner, from being sued personally for that injury. That second piece is called the exclusive remedy, and it is the trade you make. The employee gets guaranteed benefits, and you get protection from a lawsuit.

Workers comp covers full-time employees, part-time employees, and seasonal workers. In most states, it is required if you have even one employee, including a part-time one. The penalty for not carrying it varies by state, but it can include fines, lawsuits, and in some cases, being shut down. The rules vary, so the right answer for your business depends on the state where your employees actually work.

Your Experience Mod, the Number That Follows You

Here is the first thing most owners do not understand clearly. Your experience modification rate, called your mod or your EMR, is essentially a credit score for your workers comp policy.

The math is simple. A mod of 1.0 is average. A mod under 1.0 means your claims history is better than average and you get a discount. A mod over 1.0 means your claims history is worse than average and you pay a surcharge.

How Your Experience Mod Affects Your Premium

Here is the part that surprises people. A single significant claim can raise your mod for 3 years, even if you never have another claim. That means how you handle a claim matters as much as whether the claim happens. Reporting fast, getting the employee back to work on light duty when possible, and documenting everything all affect your mod. And your mod affects your premium for years.

Your Annual Audit, the Surprise Most Owners Hate

Here is the second thing. Workers comp premiums are estimated up front based on your projected payroll, and then they are trued up at the end of the year through an audit. The carrier looks at your actual payroll, your actual job classifications, and your actual subcontractor use, and they recalculate your premium.

The math at audit time looks like this. If your payroll grew, you owe money. If your payroll shrank, you get money back. If you used subcontractors who did not carry their own workers comp, you may be charged for them as if they were your employees. That last one catches a lot of owners off guard, and it is usually the biggest single line item on a surprise audit bill.

The audit is also where misclassification gets caught, sometimes in your favor and sometimes not. If your office admin was misclassified as a roofer, you have probably been overpaying for years. If your roofer was misclassified as an admin, you are about to write a big check. We have seen audits go both ways, and the difference is almost always in how the policy was set up at the start.

A Real Question From a Business Owner

Trevor, who runs a 12-person landscaping company, asked: "One of my guys hurt his back last week. What do I do in the first hour?"

Trevor, this is the question I wish more owners asked before something happened, instead of after. Here is the order.

• First, get the employee medical care. If it is an emergency, call 911. The employee's health is the priority, full stop.
• Second, contact your agent right away, ideally before you contact the carrier directly. We help triage the situation and report it correctly the first time, which protects your mod.
• Third, document everything. Time, place, what happened, witnesses, supervisor, photos, treating clinic, and work restrictions. The strongest defense against a claim that grows is the documentation you collected on day one.
• Fourth, plan return to work. Even light duty matters. The longer the employee is fully off the job, the larger the claim grows, and the more it impacts your mod. Returning to work on a modified light duty assignment really helps keep your mod calculation lower.

Three Things You Can Actually Do This Week

If you take nothing else from this post, take these three actions.

1. Find Out What Your Current Mod Is

If you do not know, that is fine, but find out. It is on your policy. Most owners cannot tell you their mod off the top of their head, and that is a problem because that one number is shaping your premium right now.

2. Review Your Job Classifications Before Your Next Audit

Not after. Misclassifications are the easiest fix in workers comp, and they are the most common reason an audit comes back with a surprise. If you have employees doing different work than what their classification code suggests, the time to fix it is before the auditor walks in.

3. Make Sure Your Subcontractors Have Their Own Workers Comp Certificates

If they do not, you may be paying for them at audit time as if they were your employees. Collecting valid certificates of insurance from every subcontractor before they start work is one of the highest-return habits a business owner can build. It takes 5 minutes per subcontractor and can save thousands at audit.

How Trailstone Approaches Workers Compensation

Workers comp is one of the policies where being independent matters most. Carrier appetite changes constantly in workers comp. The carrier that was best for your industry 2 years ago may not be the best today. We shop more than 40 A-rated carriers, we look at classifications, mod, and claims handling together, and we revisit it every renewal as part of our Commercial TRAC review. We also help with audit prep and claim reporting, because both of those affect your premium more than the rate itself.

Frequently Asked Questions About Workers Compensation

Is workers compensation insurance required by law?

In most states, yes, if you have even one employee. The specific rules and thresholds vary by state, including how part-time, seasonal, and family employees are treated. The penalty for not carrying it can include fines, civil lawsuits, and in some cases, being ordered to stop operations.

What is an experience modification rate or EMR?

Your experience modification rate, often called your mod or EMR, is a number that compares your claims history to the average for your industry. A 1.0 is average, below 1.0 earns a discount, and above 1.0 results in a surcharge. The mod is applied directly to your premium calculation each year.

How long does a workers comp claim affect my mod?

A single significant claim can raise your experience mod for 3 years, even if you never have another claim. That is why how you handle the first claim, including return-to-work planning and documentation, matters so much.

What is a workers comp audit?

An annual review where the carrier compares the payroll and classifications you estimated at the start of the policy year against what you actually paid out. The carrier then trues up the premium. If your payroll grew or your subcontractors did not carry coverage, you may owe more. If your payroll shrank, you may get money back.

Do I need workers comp for subcontractors?

Subcontractors should carry their own workers comp coverage and provide you with a valid certificate of insurance. If they do not, your carrier may charge you for them at audit time as if they were employees, which is one of the most common audit surprises.

Do I need workers comp if I am a sole proprietor with no employees?

In most states, no, although some industries and contracts require it anyway. Many sole proprietors choose to carry a policy voluntarily for their own protection, especially in trades. The right answer depends on your state and the contracts you sign.

What is the first thing to do after a workplace injury?

Get the employee medical care immediately. If it is an emergency, call 911. Then contact your agent before contacting the carrier, document everything, and start planning return to work, including light duty if appropriate.

How can I lower my workers comp premium?

The most effective long-term lever is your experience mod, which means preventing claims, handling them correctly when they happen, and getting employees back to work on light duty when possible. The most effective short-term levers are correct classifications, correct payroll estimates, and verified subcontractor certificates.

What to Do Next: Your Workers Compensation Checklist

• Pull out your policy and find your current experience mod. If you cannot find it, ask your agent today.
• Review your job classifications against the actual work each employee performs.
• Confirm your subcontractor certificate process, including who collects them and where they are stored.
• Build a written first-hour-after-injury plan that covers medical care, agent contact, documentation, and return to work.
• Schedule your audit prep meeting 30 to 60 days before your audit, not the week before.
• Review your renewal 60 to 90 days early so there is time to shop carriers if appetite has shifted.
• Ask for a written summary of your mod, your classifications, and the most likely audit issues for your business.

Talk to a Trailstone Commercial Insurance Specialist

If you would like a clear review of your workers compensation policy, including a look at your mod, your classifications, and your claims handling, we are happy to help. Visit www.trailstoneinsurance.com or give us a call to talk to one of our commercial insurance specialists. We will provide a written summary of where you stand and where the opportunities are.

Next up in the Commercial Insurance 101 series: Commercial Property, including how the gap between your replacement cost limit and the actual cost to rebuild can quietly cost business owners six figures at claim time.

Written by Mark Rodgers, President and Founder, Trailstone Insurance Group