Your Experience Modification Rate — commonly called your MOD rate or EMR — is the single most powerful number in your workers compensation program. It acts as a multiplier on your premium, and the difference between a 0.80 MOD and a 2.00 MOD can mean hundreds of thousands of dollars per year. Yet most business owners I talk to have never seen their MOD worksheet, do not know how it is calculated, and have no strategy for managing it. Let me change that.
What Is a MOD Rate?
Your MOD rate is a number calculated by NCCI (National Council on Compensation Insurance) that compares your company's actual workers comp claims to what NCCI expects for a company of your size and industry. It is based on three years of loss data, with the most recent year excluded.
- MOD of 1.00 means your losses are exactly average for your industry and size
- MOD below 1.00 means you have fewer or smaller claims than average — you get a discount
- MOD above 1.00 means you have more or larger claims than average — you pay a surcharge
How the MOD Multiplies Your Premium
The MOD is applied directly to your manual premium. Here is what that looks like in practice:
| Scenario | Base Premium | MOD Rate | Actual Premium | Annual Cost vs. 1.0 MOD |
|---|---|---|---|---|
| Best case | $500,000 | 0.75 | $375,000 | -$125,000 (savings) |
| Average | $500,000 | 1.00 | $500,000 | $0 (baseline) |
| Moderate penalty | $500,000 | 1.40 | $700,000 | +$200,000 |
| High penalty | $500,000 | 2.00 | $1,000,000 | +$500,000 |
| Severe penalty | $500,000 | 3.00 | $1,500,000 | +$1,000,000 |
How Your MOD Is Calculated
NCCI uses a specific formula that weighs several factors:
The Experience Period
Your MOD uses three policy years of data, but not the most recent year. If your MOD effective date is January 2026, it uses data from the policy years ending in 2024, 2023, and 2022. The 2025 policy year is excluded because those claims may not be fully developed.
Primary vs. Excess Losses
This is the most important concept in MOD calculation. Each claim is split into two parts:
- Primary losses: The first dollars of each claim (up to the split point, currently around $18,500 in most states). Primary losses are weighted heavily because claim frequency is a strong predictor of future losses.
- Excess losses: Everything above the split point. Excess losses are weighted much less because large individual claims are considered more random and less predictive.
This means that ten $10,000 claims will hurt your MOD far more than one $100,000 claim. Frequency matters more than severity in the MOD formula.
Expected Losses
NCCI calculates what your losses "should" be based on your payroll, industry, and state. Your actual losses are compared to this expected number. If your actual losses are below expected, your MOD goes below 1.00. If above, your MOD goes above 1.00.
MOD = Actual Losses (weighted) / Expected Losses (weighted)
If NCCI expects $200,000 in weighted losses for a company your size and you actually had $300,000, your MOD would be approximately 1.50 ($300K / $200K).
The real formula is more complex, incorporating ballast values and weighting factors, but this is the core concept.
Why Your MOD Might Be Wrong
I review MOD worksheets regularly for contractors, and errors are surprisingly common. Here are the most frequent problems:
- Claims that should be closed are still open. Open claims are valued at their current reserve, which is often inflated. If a claim has been settled but not properly closed on the NCCI worksheet, you are paying penalty premium on phantom losses.
- Wrong class codes. If your payroll was reported under the wrong classification, your expected losses will be wrong, and your MOD will be skewed.
- Claims attributed to the wrong company. If you have multiple entities, FEIN numbers, or have gone through mergers and acquisitions, claims can end up on the wrong company's worksheet.
- Subrogation recoveries not credited. If your insurance company recovered money from a third party on one of your claims, that recovery should reduce the claim amount on your worksheet. It often does not get reported.
7 Strategies to Lower Your MOD Rate
Lowering your MOD is not a quick fix — it takes 3-4 years for changes to fully flow through the calculation. But the strategies you implement today determine your MOD for the next several years.
- Focus on claim frequency, not just severity. Since primary losses (the first dollars of each claim) carry the most weight, preventing small claims has more MOD impact than preventing one large claim. Invest in slip/trip/fall prevention, proper PPE, and ergonomic training.
- Implement a formal return-to-work program. Getting injured employees back to modified duty quickly reduces the total cost of each claim. A $50,000 claim that could have been $20,000 with proper return-to-work adds unnecessary primary loss dollars to your MOD.
- Close claims aggressively. Work with your carrier's claims team to resolve open claims as quickly as possible. Every dollar of open reserve on your NCCI worksheet is being used in your MOD calculation right now.
- Audit your NCCI worksheet annually. As discussed above, errors are common. Have your agent review every line item every year, not just when your MOD spikes.
- Use nurse case management. For serious injuries, having a nurse case manager coordinate treatment can reduce claim duration and total cost by 20-30%. Many carriers offer this service at no additional cost.
- Drug-free workplace program. Georgia offers a 7.5% workers comp premium credit for certified drug-free workplace programs. This does not directly lower your MOD, but it reduces your premium and signals to carriers that you manage risk proactively.
- Safety training documentation. OSHA 10, OSHA 30, toolbox talks, equipment-specific training — document everything. This gives your agent concrete evidence to present to underwriters for schedule credits and preferred pricing, even when the MOD itself is still high.
What If Your MOD Is Already High?
If your MOD is above 1.5, you are already paying a significant penalty. While you work on bringing it down over time, there are insurance strategies that can reduce your costs now:
- Large deductible programs: You take on the first $5,000-$25,000 of each claim in exchange for a lower premium rate. If your recent losses are trending down, this can save more than the deductible risk costs you.
- Retrospectively-rated programs: Your premium adjusts based on actual losses during the policy period. Good loss years mean lower final premium. This rewards current performance rather than punishing past performance.
- Specialty high-MOD carriers: Some carriers specifically write high-MOD accounts because they look at factors beyond the MOD — current safety programs, management engagement, loss trend direction. These carriers offer rates that standard markets cannot match for elevated MODs.
- Alternative risk programs: Captive insurance, group self-insurance funds, and association programs can provide alternatives to the standard NCCI-rated market. These are typically available to larger accounts ($100K+ in premium).
Get Your Free MOD Rate Review
Bettr Coverage will review your NCCI Experience Rating Worksheet, check for errors, and run a market comparison across 300+ carrier markets to find the best program for your current MOD. Free, no obligation.
Request Your Free ReviewThe Bottom Line on MOD Rates
Your MOD rate is not a fixed number you are stuck with. It is a calculated metric that can be managed, verified for accuracy, and mitigated through the right insurance program structure. The contractors who pay the least for workers comp are not always the ones with the best safety records — they are the ones who actively manage their MOD, verify their worksheet, and work with an independent agent who shops the specialty market on their behalf.
Whether your MOD is 0.80 or 3.00, there is almost always something that can be done to improve your position. The first step is understanding the number and where it comes from. The second step is getting the right people looking at it.