NCCI 2026 State of the Line Preview: Reading the Comp Cycle Before AIS Orlando

Having sat through eight of the last ten AIS keynotes, I have noticed that Donna Glenn's prepared remarks always flag one emerging pressure point two or three years before it shows up in headline numbers. The 2025 mention of pharmacy leakage was that canary, and it is the line item working actuaries should be watching as 2026 loss cost filings cycle through the state insurance departments. The 2026 print will get framed by the trade press as a story about how long the comp profit streak can last. The actuarial story is more granular: where the AY 2025 ultimate pick lands once you remove the prior-year development contribution, which states are tipping from rate decreases to rate increases in the latest filing round, and whether AY 2021 through 2024 are starting to demand strengthening rather than continuing to release.

NCCI's 2026 Annual Issues Symposium is scheduled for May 12 to 14, 2026 at the Hyatt Regency Orlando, with the State of the Line research presentation traditionally previewed in the week immediately before the conference. Based on the cadence NCCI has held to since the in-person AIS resumed, the public preview deck and the supporting CY 2025 industry aggregate exhibits should land between April 27 and May 1, 2026. The published charts will cover private carrier net combined ratio, accident year loss ratio versus calendar year loss ratio, medical and indemnity severity trends, frequency by industry sector, and the multi-year prior-year development walk that NCCI updates each spring.

9 years

Consecutive private carrier calendar year combined ratios below 90, the longest streak in any major P&C line

~5%

Estimated 2025 medical severity trend, up from 4.2% in 2024 and against ~3% wage inflation

38 states

NCCI loss cost filing decreases proposed in the latest 2025 to 2026 cycle, smallest count since 2018

~$18B+

Cumulative private carrier favorable prior-year reserve development across the AY 2015 to 2020 cohort

The Streak in Context: Nine Years of Sub-90 and What Held It Together

The private carrier workers compensation calendar year combined ratio has printed below 90 every year since 2016, with the trough at roughly 84 in 2020 and 2021 and a slow drift back into the upper 80s through 2023 and 2024. The 2024 figure, as published in the May 2025 State of the Line, was 86, comfortably profitable on a calendar year basis. No other major P&C line, not commercial auto, not personal auto, not homeowners, not commercial property, not general liability, has produced anything resembling that consistency. The closest comparable is large commercial property in the post-Hurricane Ian repricing window, but even that ran a single-year combined ratio gap rather than a multi-year streak.

Three structural factors held the streak together longer than most reserving actuaries would have predicted in 2018 or 2019. First, frequency continued to decline through the late 2010s on the back of long-running improvements in workplace safety, the secular shift away from manufacturing and construction toward services in the U.S. employment mix, and the underlying productivity story (fewer worker hours per unit of output). Second, the prior accident year reserve cushion built up during the 2010 to 2015 hard-pricing window kept producing favorable development that flowed through calendar year results well after the underlying underwriting environment had softened. Third, the medical severity trend, while persistently above wage inflation, was contained relative to the medical CPI by aggressive medical fee schedule reform, pharmacy formulary controls, and the increasing penetration of provider network arrangements at the state level.

The pandemic did unusual things to the streak. CY 2020 and CY 2021 results benefited from frequency suppression as workplace exposure dropped, partially offset by COVID claim acceptance in some states. CY 2022 and CY 2023 saw frequency partially rebound but stayed well below 2019 baselines. CY 2024 was the first year where the post-pandemic frequency reversion began to look durable rather than transitional, and CY 2025 is the year where the question becomes whether the frequency floor has been reached and the medical severity ceiling has been broken through.

The Calendar Year Versus Accident Year Distinction That Matters

NCCI publishes both a calendar year combined ratio (the figure that appears in the trade press) and an accident year loss ratio (which is more useful for pricing). The two diverge whenever there is meaningful prior-year development in the calendar year result. For workers comp through the 2016 to 2024 window, that divergence has been substantial and consistently favorable: the calendar year combined ratio has averaged roughly 88, while the accident year loss ratio implies a combined ratio in the 96 to 100 range once expense and dividend loads are added.

The arithmetic, simplified: if the calendar year combined ratio is 86 and prior-year development contributed 8 points of favorable runoff, the accident year combined ratio for the current year is approximately 94. That spread between calendar and accident year results is the prior-year cushion, and it is finite. Each spring's State of the Line includes a chart showing how much favorable development has been recognized by accident year, with the cushion concentrated in the AY 2010 through 2017 cohort and tapering through AY 2018 and AY 2019.

The Prior-Year Development Walk

Workers compensation is a long-tail line where ultimate losses are not known with confidence for many years after the accident period. Initial loss picks are typically set conservatively, and over time, as claims close and triangulation methods produce tighter ultimates, carriers release reserves on accident years where the initial pick proved high. NCCI's State of the Line tracks this release pattern at the industry aggregate level, and the cumulative dollar value of favorable development since AY 2010 runs into the tens of billions across private carriers. The pricing actuary's discipline is to read the accident year pick on its own terms and not let calendar year results, flattered by the development walk, mask underlying loss cost movement.

Backing Into the AY 2025 Pick: A Worked Approach

NCCI publishes the prior-year development chart as a stacked bar by accident year showing the cumulative recognition of favorable (or, rarely, adverse) development through the most recent calendar year. Almost nobody translates that chart into dollar terms applied against the contemporaneous calendar year result. The exercise is not difficult and produces a useful estimate of the AY 2025 ultimate pick implied by the published CY 2025 combined ratio.

The general formula: AY 2025 ultimate loss ratio equals CY 2025 incurred loss ratio plus the prior-year development contribution to CY 2025, with the development contribution expressed in loss ratio points. If the published CY 2025 combined ratio is 88 (a plausible estimate based on the 86 print for 2024 and the modest deterioration signals through 2025), and if expenses plus dividends together run 28 points (consistent with NCCI's recent industry expense ratio disclosures), then the implied CY 2025 incurred loss ratio is roughly 60. If prior-year favorable development contributed 7 to 9 loss ratio points (in line with the 2023 and 2024 pattern but trending down as the AY 2010 through 2017 cushion diminishes), then the AY 2025 implied loss ratio sits in the 67 to 69 range.

An AY 2025 loss ratio of 67 to 69, combined with the 28-point expense and dividend load, produces an AY 2025 combined ratio in the 95 to 97 range. That is not a loss-making accident year on its own terms, but it is a meaningful step up from the 92 to 94 implied AY combined ratios that prevailed in the late 2010s and early 2020s. More importantly, the AY 2025 result is a forward-looking indicator: it is the loss ratio that current pricing must absorb before any prior-year development support, and it is what 2027 and 2028 calendar year results will inherit as the prior-year cushion continues to taper.

Scenario	CY 2025 combined	Implied AY 2025 combined	Reading
Streak holds, modest favorable development	87 to 89	94 to 97	Streak intact, AY pick stable, pricing adequate
Streak holds but with frequency uptick recognized in current AY	89 to 91	97 to 100	Streak intact on CY basis, AY pick at industry breakeven
Streak breaks, frequency reversal plus medical severity acceleration	91 to 93	99 to 102	First sub-100 streak break since 2015, AY pick into deficit
Streak holds, but AY 2021 to 2024 adverse strengthening offsets older cushion	88 to 90	96 to 98	Cushion thinner than reported, AY pick directionally worse

The most likely outcome based on the year-end 2025 statutory data, the early Q1 2026 carrier disclosures, and the ISO loss cost trend signals is the second or fourth scenario. A clean streak break is possible but less likely. Pricing actuaries should be running their internal indications against the third scenario as a stress case, particularly for state books with high coastal cumulative trauma exposure and for the larger national writers whose books have material cross-state correlation.

Medical Severity: The 5 Percent Threshold and What Sits Underneath

NCCI tracks medical severity (average medical cost per claim) and indemnity severity (average wage replacement per claim) as separate trend series. Medical severity has run persistently above wage inflation for the entire post-2010 period, but until 2023 the gap was generally containable because the underlying utilization and unit-cost trends were both relatively stable. The 2024 print landed at 4.2 percent medical severity, and the 2025 statutory data is consistent with a print in the 4.8 to 5.2 range.

The drivers underneath the 2025 acceleration are not uniform. Three components are doing most of the work. The first is physical therapy utilization, which has been growing in both visits per claim and average cost per visit, partially because PT has been the primary alternative to opioid prescribing since the post-2017 pharmacy formulary tightening. Second is high-cost specialty pharmacy, which Donna Glenn flagged in 2024 and 2025 keynotes and which is becoming a meaningfully larger share of total medical spend even though prescription volumes are down. The specialty pharmacy contribution includes biologic anti-inflammatory therapies, certain pain management modalities, and some specialty injectables that did not appear on workers comp formularies in volume before 2022. The third is hospital inpatient unit cost, which is being pulled by the broader medical CPI environment and by hospital pricing concentration in many regional markets.

The pharmacy leakage point that Donna Glenn flagged in the 2025 keynote deserves particular attention because it cuts across two trends at once. First, total prescription volume is down (the post-formulary opioid story remains the largest single driver of long-run pharmacy improvement in comp). Second, average cost per prescription is up materially, with the specialty pharmacy contribution concentrated in a small number of high-cost claims. The leakage refers to the fact that workers comp pharmacy controls (formulary lists, PBM arrangements, pharmacy fee schedules) work less well on specialty drugs than on traditional outpatient drugs, because the specialty supply chain is more vertically integrated and the unit cost basis is harder to negotiate. Pricing actuaries should be reviewing whether their internal medical trend indications adequately capture the specialty pharmacy component, because the historical trend data may understate the forward run.

Frequency: The Pandemic Floor Question

Workers compensation frequency, measured as lost-time claims per unit of payroll exposure, declined steadily from the early 1990s through 2019. The pandemic produced a sharp downward shock in 2020 and 2021 (less workplace presence, less workplace exposure, less injury). The 2022 and 2023 frequency reversion was partial: NCCI tracked it, the trend press wrote about it, and most pricing actuaries built the partial reversion into their forward indications.

The 2024 and 2025 frequency picture is more nuanced. Aggregate frequency continues to drift lower on a long-term trend basis, but the rate of decline has slowed materially, and several injury type categories are running flat to up rather than continuing the multi-decade descent. Three categories warrant specific attention. Cumulative trauma claims (carpal tunnel, repetitive strain, certain back injuries) have ticked up as remote and hybrid work configurations exposed ergonomic deficiencies that the office-based pre-pandemic environment masked. Motor vehicle accident claims arising in the course of employment have recovered to and slightly above 2019 levels as commercial driving exposure normalized. Presumption claims (statutory presumptions of work-relatedness for certain occupations and conditions, particularly in cardiac, cancer, and behavioral health categories for first responders) continue to grow as states expand the categories that qualify for presumption treatment.

For the 2026 State of the Line, the question is whether NCCI's published frequency chart shows the multi-decade descent reasserting itself or whether the 2024 to 2025 plateau is the new floor. Either reading has implications for pricing. If the descent reasserts, then loss cost decreases continue and the calendar year combined ratio streak holds. If the plateau hardens, then the offset that has been masking the medical severity acceleration disappears, and loss costs need to start rising in most states in 2026 to 2027 filings.

The Loss Cost Filing Tally and What It Says About Carrier Conviction

NCCI files loss cost recommendations in the states where it has filing authority (most states use NCCI loss costs as the regulatory benchmark, though a handful of states maintain independent rating bureaus). Each filing cycle produces a tally of states where NCCI proposed an overall loss cost decrease versus an increase, weighted by direction and magnitude. Through the 2017 to 2023 filing cycles, decreases dominated overwhelmingly: in some years, more than 45 of the NCCI states received a proposed loss cost reduction, with some single-year cuts exceeding 10 percent.

The 2024 to 2025 cycle saw the count of decreases shrink, with a handful of states moving to flat or modest increase. The 2025 to 2026 cycle (filings reviewed and approved through the first quarter of 2026) shows further compression: the count of decreases is the smallest since 2018, the average magnitude of the decreases is smaller, and the count of increases (still a minority but growing) has reached the highest level since 2015. The Virginia loss cost reduction filed in early 2026 was widely covered, but the more significant shift is the cluster of states (across the Mountain West, the Upper Midwest, and select Southeastern jurisdictions) where NCCI proposed flat or marginal increase rather than the multi-year pattern of decrease.

The filing pattern matters because it is the most direct read on NCCI's underlying view of forward loss costs. NCCI's actuarial staff sees the same triangle data the carrier reserving actuaries see, augmented by industry aggregate detail no individual carrier has. The shift from broad-based decrease to mixed direction is a tell: the loss cost trend that supported a decade of rate reduction is no longer doing so uniformly, and carriers building 2027 rate plans should be prepared for a filing environment where flat to up is the modal outcome rather than the exception.

Reserve Adequacy by Accident Year: Where the Cushion Is Wearing Thin

The favorable prior-year development that has flattered calendar year results is not uniformly distributed across accident years. NCCI's State of the Line publishes a chart by accident year showing cumulative dollar value of favorable (or adverse) development recognized through the most recent calendar year. The pattern through year-end 2024 ran roughly as follows. Accident years 2010 through 2017 collectively contributed the bulk of favorable development, with single-year contributions in the $1.5 billion to $3.5 billion range and cumulative recognition for the cohort exceeding $18 billion across private carriers. Accident years 2018, 2019, and 2020 contributed smaller but still positive favorable development. Accident years 2021, 2022, 2023, and 2024 are too immature to read with confidence, but the early development indicators through year-end 2024 ran modestly adverse (small upward strengthening rather than continued favorable runoff).

The early adverse signal on AY 2021 through 2024 is what reserving actuaries should be focusing on through the 2026 State of the Line release. If those accident years continue to develop adversely (with the strengthening tracked at industry aggregate level), then the favorable cushion from older accident years is being partially consumed in the calendar year P&L by current strengthening. The reported calendar year favorable development is a net number, and a rising offset from recent accident years compresses the headline cushion even when the older accident years continue to release.

For Appointed Actuaries signing statements of opinion under ASOP No. 36 on year-end 2026 reserve indications, the AY 2021 to 2024 development trajectory should be one of the items getting explicit attention in the reasonable range analysis. The reserve indication framework that Travelers used in Q1 2026 for explicit AY 2025 uncertainty IBNR is a P&C-wide pattern, and it applies to comp with particular force given the long tail and the medical severity acceleration that affects ultimate loss values years after the accident occurred.

State-Level Variation: Where the Combined Ratio Spread Lives

The industry aggregate combined ratio masks substantial state-level variation. Workers compensation results in California, New York, and Florida have historically been more volatile than the national aggregate, driven by a combination of regulatory environment, indemnity benefit structure, medical fee schedule design, and state-specific litigation patterns. The 2026 State of the Line will publish state-by-state combined ratio detail (typically with a one-year lag, so the state detail covers 2024 results in the May 2026 release).

Three state stories warrant attention in the 2026 release. California, where the state-administered Workers Compensation Insurance Rating Bureau (WCIRB) sets pure premium rates rather than NCCI, has been running combined ratios well above the national aggregate for several years, driven by cumulative trauma frequency, presumption claim growth, and provider concentration in coastal markets. The 2026 California result will be a useful read on whether the WCIRB's recent pure premium decreases (which have continued through the 2025 to 2026 cycle) are running ahead of the underlying loss cost reality. Florida's recent Estes decision on the workers compensation statute of limitations created a meaningful structural change for older accident year exposure, and the 2026 State of the Line will be the first NCCI release that reflects post-Estes loss development on the state's older claim inventory. The Mountain West cluster of states (Colorado, Utah, Wyoming, and adjacent jurisdictions) has been a quiet outperformer for several years, but several of those states are running into the loss cost increase wall in the 2026 filing cycle, suggesting the underwriting margin on those state books is compressing.

Reinsurance and Excess of Loss Implications

Workers compensation excess of loss reinsurance is a smaller market than its property-cat counterpart but plays an outsized role in the capital structure of monoline workers comp writers and certain larger national writers with concentrated state exposure. The 2026 State of the Line read affects WC excess pricing on two paths. First, the medical severity acceleration directly affects expected ultimate loss values on the catastrophic claims that drive excess layer attachment, particularly the high-severity quadriplegia, severe traumatic brain injury, and complex burn claims that can run into the eight-figure ultimate. Second, the AY 2021 to 2024 development pattern, if it crystallizes as adverse, will pull through the excess layers on accident years that were assumed at lower ultimates when the treaty was written.

For the 1/1/2027 WC excess renewal cycle, ceding companies should be prepared for reinsurer questions on the medical severity trend assumption embedded in the cession, particularly on multi-claimant occurrence covers and on aggregate excess covers tied to medical loss ratio thresholds. The reinsurance market backdrop, which the broader 2026 reinsurance market analysis covered for the property side, has WC-specific implications: the loss cost trend story that supported a decade of soft excess pricing is moving in a less favorable direction, and the 2027 renewal is likely to see the first meaningful firming in WC excess pricing in several years.

What the AIS Keynote Will Probably Frame

NCCI Chief Actuary Donna Glenn's State of the Line presentation has followed a consistent structure for the past several years: macro frame, calendar year results, accident year decomposition, severity and frequency walks, prior-year development, state filing summary, and one or two emerging issue deep dives. The 2026 keynote, based on the trajectory of the 2024 and 2025 presentations, will probably devote substantial time to three threads.

The first thread is the medical severity acceleration and its decomposition. Expect detailed treatment of pharmacy leakage (continuing the 2025 thread), physical therapy utilization, and hospital unit cost. The presentation will probably preview NCCI research on how the medical severity components are likely to evolve through 2026 and 2027.

The second thread is the frequency stability question. Expect explicit treatment of the cumulative trauma trajectory, the motor vehicle accident category, and the presumption claim growth across states. The keynote will probably take a position on whether the multi-decade frequency descent has reasserted or whether the 2024 to 2025 plateau is structural.

The third thread is the loss cost filing environment and the implications for carrier rate adequacy. Expect a state-by-state graphic showing the 2025 to 2026 filing tally and an explicit discussion of the conditions under which NCCI's underlying loss cost view shifts from broad-based decrease to mixed direction. The conclusion will be measured (NCCI's institutional voice favors caution over alarm) but the substance will be that the rate-decrease era is winding down.

The Originality Angle: Why the Headline Combined Ratio Misleads

Trade press coverage of the State of the Line release will lead with the calendar year combined ratio. The headline number is real and informative, but it is also a lagging and composite indicator that bundles current accident year experience with the runoff of older accident years. The pricing actuary's discipline is to disaggregate the headline into its components: current accident year loss ratio, current accident year expense and dividend load, prior-year development contribution by source accident year, and the underlying frequency and severity trends that generated the current accident year pick.

The disaggregated read for 2025 is more informative than the headline. The headline combined ratio probably stays below 90 (the streak holds for a tenth year). The current accident year combined ratio probably runs in the mid-90s and may push to or through 100 in some scenarios. The prior-year development cushion is thinner than headline figures suggest, with a smaller positive contribution from the AY 2010 to 2017 cohort offset by emerging modest adverse strengthening on AY 2021 to 2024. The forward path for 2026 and 2027 calendar year results inherits a current accident year baseline that is materially worse than the headline implies, against a development cushion that is shrinking.

Why This Matters

For pricing actuaries supporting workers compensation rate filings in 2026 and 2027, the 2026 State of the Line is the single best industry-aggregate read on whether the current rate environment will support adequate loss cost coverage going forward. The broad-based loss cost decrease pattern that prevailed from 2017 through 2024 is winding down, and the filing environment for 2027 is likely to feature more states moving to flat or modest increase. Internal indications that anchor heavily on multi-year favorable development experience may be running ahead of the underlying loss cost reality.

For reserving actuaries on workers compensation books, the AY 2021 to 2024 development trajectory is the metric to watch. Modest current adverse strengthening can compound rapidly on a long-tail line, and the older accident year favorable cushion is finite. The reasonable range work supporting the year-end 2026 statement of actuarial opinion should explicitly contemplate scenarios where the AY 2021 to 2024 cohort develops adversely through 2027 and 2028.

For reinsurance underwriters writing workers compensation excess of loss covers, the 1/1/2027 renewal cycle is likely to be the first in several years where the loss cost trend story argues for firming rather than further softening. Cession structures, attachment points, and aggregate features that were calibrated to the 2018 to 2024 favorable development environment should be revisited against an accident year baseline that is moving the other direction.

The 2026 NCCI State of the Line is not going to produce a dramatic narrative. The streak will probably hold on the headline. The story is in the components, in the filing tally, and in the AY 2021 to 2024 development chart. Working actuaries should download the preview deck the week it lands, run their internal indications against the published industry aggregate, and pay particular attention to how the prior-year development walk has evolved since the May 2025 release. The 2027 rate filing season starts with the conclusions actuaries draw from the 2026 release, and the conclusions worth drawing live in the disaggregated detail rather than the headline.