TL;DR

As a business owner in high-labor, physically demanding industries like energy and construction, you already know that keeping your worker’s compensation insurance costs low starts with having a low Experience Modification Rate or “E-mod Rate”. And so, your entire focus is always on keeping out those big injuries and high-cost claims. But what you may not realise is that all those frequent smaller incidents – brushed off as minor accidents – are in fact, affecting your bottom line by slowly driving up your e-mod rate.

For small businesses operating in physically demanding, HSE-sensitive sectors like construction and oil & gas, repeated incidents could be costly. That is why understanding how frequency vs severity impacts your e-mod is critical to keeping your insurance costs competitive.

Let us understand this better.

How is the Experience Modification Rate or EMR?

Experience modification rate or EMR is like a credit score that helps insurance providers assess your workplace’s riskiness or its propensity for injuries. 

How is it calculated? Usually, the National Council on Compensation Insurance (NCCI) or the bureau for workers’ comp rating in your state takes care of this. The formula accounts for: 

Ideally, you should strive to keep actual losses lower than expected ones for a low EMR. Now, if your EMR turns out to be 1.00, your company is at par with the industry average in losses. 

Don’t forget about the frequency and severity of losses though since this impacts your premium too.

In fact, this might surprise you. The regulatory penalty for a business with multiple small losses is greater than a business that suffers one big loss.

Why? Frequent claims indicate you might experience more such losses in the years to come. Hence, insurance carriers deem you as comparatively riskier and charge higher premiums. 

Frequency vs. Severity: What Matters More? 

The EMR of your company is calculated by the National Council of Compensation Insurance (NCCI) or your state’s workers’ compensation rating bureau. The formula used compares a company’s actual losses to expected losses, and then compares them to similar companies in the HSE industry.

To understand why frequency hurts your e-mod more than severity, let’s look at how the EMR calculations are done.


In the EMR calculation formula, primary losses carry more weight. While excess losses matter too, they don’t contribute as significantly to the calculation.

This is because in  high-labour and physically-demand industries, where HSE risks are high, a single major accident is often considered random. However, small, frequent losses bring a company’s safety culture under scrutiny.

What are the key factors that affect your Experience Mod calculation –

Why Experience Modification Rate Matters for your Company’s Bottomline? 

Just to reiterate what we explored before – a high EMR implies a high-risk workplace, bigger insurance premiums, and hence, greater compensation costs. In fact, you might end up paying a premium that is 25 to 50% higher than an industry peer with a lower experience mod rate.

What does that mean for your bottom line? It weakens, from poor cash flow and reduced profitability. You lose your competitive edge. In sectors like construction, a high EMR might even make it challenging for you to bid for a large or high-return project. 

However, by lowering your EMR even marginally (say 1.0 to 0.9), you can save substantially every year and augment the cash flow. This is especially true for big employers.  

How can you reduce losses and lower your Experience Modification Rate

Here are a few effective strategies that business owners and safety managers can use to lower the experience modification rate over a period of time.

In Conclusion 

By now, you have seen that when it comes to workers compensation EMR calculations, frequent minor injuries can cost you more than one big one. That is because every claim – no matter how small – will drive up your e-mod rate, and with it, your insurance premiums.

Remember that your experience modification rate is not just a number – it’s a direct reflection of your company’s safety performance. Lowering it, will need consistent efforts, including a strong injury prevention program, early reporting, smart return-to-work programs, and access to a good remote triage service.

At Work Partners, we help business owners reduce the frequency of injury claims lower through by offering a more efficient management of injuries through our remote doctor-led triage services. Our approach reduces the need to visit the ER for minor injuries, prevents minor accidents from becoming OSHA recordables, and keeps the EMR in check, especially if you are operating on a small scale. In other words, you don’t need to stress about regulatory fines, high premiums, or sizable workers’ comp.   To learn more about how we help in controlling the e-mod rate, get in touch today. Or if you need us to promptly tackle injuries, give a ring on (800) 359-5020. We are easy to reach on (651) 323-8654 and at info@workpartnersusa.com if there’s something else on your mind.

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