Michigan Contractor Insurance: Workers Comp Experience Modification Factor (Mod) - Explained

Michigan Contractor Insurance: Workers Comp Experience Modification Factor (Mod) - Explained

When it comes to workers compensation insurance, one of the most important—and misunderstood—factors that affects your premium is the Experience Modification Factor, or “Experience Mod.”

For Michigan contractors, this single number can have a major impact on both your insurance costs and your ability to win new jobs.

What Is the Experience Mod Factor?

The Experience Modification Factor (EMR or Mod) is a number insurance companies use to compare your business’s claims history to the industry average for similar types of work.

Think of it as your company’s safety scorecard.

• A Mod below 1.0 means your business has performed better than average—fewer or less severe claims—so you’ll receive a discount on your workers comp premium.
• A Mod above 1.0 means your business has had more claims or higher costs than expected, and your premium will be surcharged as a result.

How the Experience Mod Impacts Your Premium

The Experience Mod acts as a multiplier on your base workers compensation rate.

For example:

• If your base premium is $100,000 and your Mod is 0.85, your adjusted premium becomes $85,000.
• If your Mod is 1.15, your premium increases to $115,000.

That’s a 30% swing in cost—based entirely on your claims performance.

How the Mod Is Calculated

Your Mod is calculated using your claims history over a three-year period, excluding your most recent policy year.

For instance, if you’re renewing in 2025, your Mod is based on data from 2021–2023.

Insurance companies evaluate both:

• Frequency: How often claims occur.
• Severity: How expensive those claims are.

Frequent small claims can hurt your Mod almost as much as one big loss, which is why controlling both matters.

Why the Mod Matters for Michigan Contractors

For contractors, your Experience Mod doesn’t just affect insurance—it can influence your ability to get work.

Many general contractors, project owners, and municipalities review Experience Mods as part of the bidding process.

• A low Mod signals strong safety culture and can make you more competitive.
• A high Mod may raise concerns about job site safety and risk management.

In some cases, owners require a Mod below a certain threshold (like 1.0) to qualify for bids.

How to Lower Your Experience Mod

The good news: your Mod is within your control over time. Here’s how to improve it:

1. Prioritize Safety Programs – Invest in safety training, enforce job site protocols, and reward safe behavior.
2. Report Claims Promptly – Early intervention helps manage costs and prevents small injuries from becoming big claims.
3. Return-to-Work Programs – Get injured employees back to modified duty quickly to reduce claim duration and cost.
4. Review Your Loss Runs – Work with your insurance agent to verify claims data and correct any inaccuracies.
5. Partner With a Proactive Agent – A good independent agent can help you benchmark your Mod, identify trends, and connect you with carriers that value safety performance.

Final Thoughts

Your Experience Modification Factor is more than an insurance number—it’s a reflection of how well you manage safety and risk.

For Michigan contractors, a strong safety culture can mean lower premiums, better project opportunities, and a stronger reputation in the industry.

Stay proactive, review your Mod regularly, and make safety a competitive advantage for your business.