| John Bosman | 900 words
Somewhere on the workers compensation renewal, there's usually a number labeled experience modification factor, or E-Mod, sitting quietly next to the premium total it directly affects. Most dealership owners know it exists, fewer know exactly what moves it, and even fewer have ever had someone walk through what it would take to move it in the right direction. For a dealership with a workforce that spans sales, service technicians, detailers, and lot staff — each with a different injury risk profile — that number is worth understanding on its own, not just accepting as a line on the bill.
Short answer
The E-Mod directly affects workers comp premium and can move meaningfully year to year, but many dealers never get a clear explanation of what's driving the movement.
Reader checkpoint
- Do you know your dealership's current E-Mod number, and whether it moved up or down from last year?
- Do you know which department or role has driven the most claims activity in the past few years?
- Has anyone walked you through what specifically would need to change to move your E-Mod in the right direction?
Quick answer
The experience modification factor compares a dealership's actual workers compensation claims history against what's expected for a business of similar size and classification — a factor above 1.0 increases premium, a factor below 1.0 reduces it, and the number moves based on claims frequency and severity over a rolling multi-year period, which means today's claims history is shaping premiums for years to come, not just the next renewal.
At a glance
| Main issue | The E-Mod directly affects workers comp premium and can move meaningfully year to year, but many dealers never get a clear explanation of what's driving the movement. |
|---|---|
| Common blind spot | Treating the E-Mod as a fixed number outside your control, rather than a rolling calculation shaped by claims history that can be actively managed. |
| Useful document | The current E-Mod worksheet or experience rating sheet from the carrier, which breaks down the calculation by classification code and claims history. |
| Best next step | Ask for a plain-language walkthrough of what's driving your current E-Mod, and which specific claims or trends are weighing on it most. |
Defined Q&A
Workers Comp E-Mod for Auto Dealers Explained: Why the Number Moves and What You Can Do About It: common questions
What's a 'good' E-Mod for an auto dealership?
Below 1.0 means better-than-expected claims experience relative to similar businesses; exactly 1.0 is right at the industry average. There isn't a single universal target, since it depends on the dealership's size and classification mix, but the direction of movement year to year is usually more informative than the number alone.
How long does a claim affect my E-Mod?
Typically it stays inside the rolling calculation window for about three years before aging out, which means a single significant claim can influence premium calculations across multiple renewal cycles, not just the next one.
Can I dispute my E-Mod calculation?
In some cases, if there's a classification error or a claim was coded incorrectly. This is worth raising directly if the number doesn't seem to reflect the dealership's actual experience — but it starts with getting a clear breakdown of the calculation, not just the final number.
Does a single bad claims year ruin my E-Mod permanently?
No — because the calculation is based on a rolling window, the impact of any single year fades as it ages out of the calculation and is replaced by more recent experience, provided that more recent experience is actually better.
See how this fits into the full picture on the Auto Dealer Insurance page, or check your renewal readiness with the Auto Dealer Insurance Friction Check.
What the E-Mod actually measures
The experience modification factor is a standardized comparison: it takes a dealership's actual claims history over a rolling period (typically the three most recent completed policy years, with the most recent year usually excluded from the calculation) and compares it against the expected claims experience for businesses of similar size and job classification. A factor of 1.0 means claims experience is right in line with expectations for the industry. Anything above 1.0 increases premium relative to the base rate; anything below 1.0 reduces it. Because it's a comparison against peers in the same classification, the E-Mod isn't just about how many claims occurred — it's about how a dealership's claims history compares to similar dealerships.
Why the number moves from year to year
Because the E-Mod is calculated on a rolling multi-year window, a single claim doesn't just affect one renewal — it can influence the calculation for several years afterward as it moves through the rolling period and eventually ages out. This is why an E-Mod can keep moving in the wrong direction even after a dealership has improved its safety practices: past claims are still inside the calculation window, and it takes time for improved current-year experience to outweigh them. It also means a quiet year with no claims doesn't necessarily produce an immediate, dramatic improvement — the benefit compounds gradually as older claims roll out of the calculation.
Where the claims activity actually comes from
A dealership's workforce isn't uniform, and neither is its injury risk. Service technicians working with lifts, tools, and vehicles under repair carry different exposure than sales staff or office personnel. Lot staff moving inventory around a busy lot carry their own risk profile. Understanding which classification or department is actually driving claims activity — rather than treating the E-Mod as one undifferentiated number — is usually the first useful step toward addressing it, since the fix for a service-bay injury pattern looks different than the fix for a lot-staff pattern.
What a dealer can actually do about it
The E-Mod isn't something a dealership can negotiate directly with a carrier, but it isn't fixed either — it responds to what actually happens in the business. Reducing claims frequency and severity going forward is the direct lever: safety programs targeted at the specific classifications driving claims, return-to-work programs that reduce the duration and cost of claims that do occur, and accurate classification coding (making sure employees are coded to the classification that actually matches their work, since misclassification can distort the calculation) are the practical tools available. None of these move the number overnight, but they compound over the rolling calculation period the same way claims history does.
Why this belongs in a full program review
The E-Mod doesn't exist in isolation from the rest of a dealer's workers compensation program, and it's specifically called out as one of the items a useful dealer renewal review should surface — alongside expiring and renewal premium by line, coverage highlights, deductible changes, and required actions. A review that shows the premium number without explaining what's driving the E-Mod behind it leaves a dealer with the bill but not the lever to actually change it.
What to do next
Use the related tool or ask for a review before you make coverage changes.
Auto Dealer Insurance Friction Check | Start a Coverage Review | Auto Dealer Insurance