Workers Comp Severity Rate Cuts: CFO Renewal Math
Jencap's June 18 construction warning points to the right problem: fewer claims aren't enough. NCCI and WCRI severity data show how a 0.10 mod move can erase a 5% loss-cost cut.
Workers comp severity rate cuts matter because bureau loss-cost decreases apply before the mod, while higher claim severity can push the mod up. NCCI expects approved bureau changes to lower written premium 5.0% from 2025 to 2026 (NCCI SOL Guide, May 2026), but a 0.10 mod increase on $250,000 standard premium adds about $25,000 (Orson renewal model, July 2026).
Workers comp severity rate cuts are not two separate stories this renewal season. The rate filing can look friendly while the claim side quietly makes the account worse.
Jencap's June 18 construction workers' compensation warning tied the issue to WCRI's April CompScope release: total workers' compensation claim costs grew 6% per year from 2022 to 2025 in the median study state, based on 18 states (WCRI, April 2026). Sebastian Negrusa at WCRI said costs "began to rise again" (Sebastian Negrusa, WCRI, April 2026). That's the sentence construction CFOs should take to renewal meetings.
Rate cuts don't insure the claim. They only change the base price.
Why workers comp severity rate cuts collide
NCCI (National Council on Compensation Insurance) says approved bureau loss-cost and rate changes are expected to decrease written premium by an average of 5.0% from 2025 to 2026 (NCCI State of the Line Guide, May 2026). Its most recent filings produced decreases for nearly every NCCI state, with changes ranging from -15.6% to +21.6% (NCCI State of the Line Guide, May 2026).
That sounds like relief. It is, but only on one layer of the bill.
The Experience Modification Rate (EMR, also called the mod) comes from the individual employer's payroll and loss data. NCCI's experience-rating primer says the latest available three years of data are usually compared to similarly grouped employers to calculate the mod (NCCI ABCs of Experience Rating, 2025). So a lower filed rate can meet a higher account multiplier on the same invoice.
NCCI's own 2026 severity data explains the collision. Construction medical severity increased 13% between Accident Year 2023 and Accident Year 2024 (NCCI State of the Line Guide, May 2026). Construction also had the highest lost-time medical claim severity across all industries (NCCI State of the Line Guide, May 2026). Over half of the 10 largest construction classes saw double-digit medical severity increases, while only three saw decreases (NCCI State of the Line Guide, May 2026).
The rate file says down. The claim file says watch it.
The 0.10 mod move beats a 5% cut
Use the renewal math construction controllers actually see. Start with $250,000 in standard premium before the mod (Orson renewal model, July 2026). A 5% bureau decrease is worth $12,500 before the mod (NCCI State of the Line Guide, May 2026; Orson renewal model, July 2026). A 2% decrease is worth $5,000 (Orson renewal model, July 2026).
Now let the mod move 0.10. On the same $250,000 standard premium, a 0.10 EMR increase adds roughly $25,000 annually before carrier credits, deductibles, payroll movement, or schedule rating (Orson renewal model, July 2026). That is twice the value of a 5% cut. It is five times the value of a 2% cut.
This is why ownership can hear that state rates are falling and still ask why the insurance budget rose. The bureau decrease is real. It just isn't the whole formula.
In our reviews of Southeast contractor worksheets, the budget miss usually comes from timing. A CFO models the renewal off last year's mod, then a claim value changes before the new worksheet lands. Or the worksheet arrives after the renewal story has already been told internally. Nothing dramatic has to happen. Ten mod points on a six-figure account are enough.
Severity is rising through more than price
NCCI's 2026 State of the Line shows the broader workers' comp system is still profitable, but the direction is less comfortable. The 2025 calendar-year combined ratio was 91%, while the 2025 accident-year combined ratio was 102% (NCCI State of the Line Guide, May 2026). One number says the system made money. The other says current accident-year policies are under more pressure.
The medical detail matters. NCCI reported total medical cost per lost-time claim up 6% from 2023 to 2024, with utilization up 4% and price up 2% (NCCI State of the Line Presentation, May 2026). Physician services represented 37% of medical cost, outpatient 23%, and inpatient 17% (NCCI State of the Line Presentation, May 2026). This is not just a fee-schedule story. More care, longer care paths, and higher wages all feed the claim number.
The 2025 severity estimate keeps the pressure alive. NCCI estimates average lost-time medical claim severity at $30.6K in Accident Year 2025, up 4% from $29.5K in Accident Year 2024 (NCCI State of the Line Presentation, May 2026). It also estimates indemnity severity up 4% in 2025 (NCCI State of the Line Guide, May 2026).
Frequency still helps, but less than before. Lost-time claim frequency declined 2% in 2025, slower than the long-term average annual decline of -3.8% (NCCI State of the Line Guide, May 2026). When severity is rising faster than frequency is falling, the mod becomes the line item CFOs can't treat as background.
What an audit would check
An audit checks whether the mod used in the renewal model matches the current file, whether claim values entering the experience period still tell the right cost story, and whether payroll classifications reflect the work actually performed. It does not change NCCI's 5.0% filed decrease or WCRI's 6% claim-cost trend. It decides whether your account is carrying severity it should not carry.
If your July renewal forecast depends on rate relief, send us your NCCI worksheet and we'll review whether severity has already eaten the cut.