P&C Growth Goes Negative as Industry Hits Decade-Low Combined Ratio

The Triple-I/Milliman Forward View released May 14 projects P&C net premium growth at negative 3.7% for the first half of 2026, down sharply from positive 1.6% in 2025. That forecast landed just days after AM Best confirmed the industry posted a 92.9% net combined ratio for full-year 2025, the strongest underwriting result in nearly two decades. Net underwriting income tripled to $60.9 billion. Fitch pegged the result at 93.0%, calling it the best since 2006. Swiss Re went further, labeling 2025 the "cyclical peak" for U.S. P&C underwriting profitability.

This growth-profitability divergence is historically unusual, and it carries specific implications for actuaries across pricing, reserving, and capital functions. When premium volume contracts while profitability peaks, the industry is signaling that the rate adequacy gains driving today's margins have exhausted their capacity to attract new premium. The competitive dynamics that follow this pattern have played out consistently over the last three cycles: the 2006 peak preceded the 2007-2011 soft market, the 2013 trough in combined ratios set up the 2014-2017 competitive period, and the brief 2019 improvement reversed sharply through 2020-2022 catastrophe losses. Each time, the industry's best combined ratios preceded deterioration within 12 to 18 months.

From tracking these cycles over the past decade, the pattern is remarkably consistent: the peak profitability quarter is also the quarter where the seeds of the next downturn are planted. Carriers begin competing for market share on price precisely because current results look strong enough to absorb the concession. The actuarial challenge is distinguishing between rate-level adequacy and rate-level sustainability when premium volume is already contracting.

The Triple-I/Milliman Forward View: Core Projections

The May 2026 edition of the Triple-I/Milliman P&C Economics and Underwriting Projections report, authored by Michel Leonard of the Insurance Information Institute and Jason B. Kurtz of Milliman, provides six key data points that frame the current state of the market.

Net premium growth turns negative. The headline projection of negative 3.7% underlying P&C growth for H1 2026 marks the first industry-wide contraction since the pandemic disruption of 2020. Growth was positive 1.6% in full-year 2025, itself a deceleration from 4.0% in personal auto (the lowest since 2021) and similar decelerations across commercial lines. Recovery is not projected until 2027. As Leonard noted in the press release, "Although conditions have stabilized somewhat, insurers continue to operate in an environment marked by elevated catastrophe risk, higher claims severity and ongoing economic uncertainty."

Combined ratios are at decade lows. The industry-wide net combined ratio for 2025 was the lowest in more than a decade, driven by the personal lines turnaround that took hold through 2024 and 2025. AM Best's statutory filing data shows 92.9% for the full year. Fitch's estimate of 93.0% makes it the best result since 2006. The Q3 2025 quarterly combined ratio of 89%, per Swiss Re, was the lowest single-quarter result since at least 2001.

Replacement cost growth has moderated. The Forward View projects replacement cost growth at 2.1% for H1 2026, flat with 2025 levels. This represents a significant deceleration from the 6% to 8% range that drove severity inflation through 2022 and 2023. However, the report cautions that replacement costs are expected to re-accelerate through 2028 and eventually outpace overall U.S. inflation, particularly as tariff effects on construction materials and auto parts propagate through the claims pipeline.

Favorable reserve development provided a significant tailwind. AM Best reported $18.1 billion in favorable prior-year reserve development for 2025, nearly doubling the prior year's level. Excluding this favorable development, the accident-year combined ratio was 94.9, almost two full points worse than the calendar-year result. This gap between calendar-year and accident-year performance is a critical distinction for actuaries assessing the sustainability of current profitability.

Line-by-Line Performance: The Divergence Beneath the Average

Industry-level combined ratios obscure significant variation across lines of business. The 2025 results reveal a two-tier industry, with personal lines and workers' compensation posting exceptional results while general liability and commercial auto remain stubbornly above breakeven.

Line of Business	2025 Net Combined Ratio	Trend	Forward Outlook
Personal auto	91.8	Improved 3.5 pts from 2024	Favorable into 2026; NWP growth slowing to 4.0%
Homeowners	88.1	Decade low despite LA wildfires	Replacement cost re-acceleration could pressure margins
Workers' compensation	91 (CY, per NCCI)	12th consecutive year below 100	Low 90s through 2028; AY CR at 102
General liability	Above 100	Persistently unprofitable	Gradual improvement; above 100 through 2026
Commercial auto	Above 100	Persistently unprofitable	Forecast at 104.4 in 2026; no near-term breakeven

Personal auto's 91.8 combined ratio reflects the cumulative effect of three years of double-digit rate increases that finally caught up with the severity surge of 2021 through 2023. Dale Porfilio of Triple-I framed the result directly: "The substantial rate increases necessary to offset inflationary pressures on losses have driven the improved results in personal auto and homeowners." The 4.0% NWP growth rate, the lowest since 2021, suggests the pricing cycle has largely run its course in this line. Carriers that pushed rate harder and earlier, like Progressive (86.4% CR in Q1 2026) and GEICO (87.3%), are now competing for growth on the back of their pricing advantage.

Homeowners at 88.1 is notable because the LA wildfires in January 2025, which generated approximately $40 billion in insured losses (Swiss Re sigma 1/2026), were not enough to push the line above breakeven for the year. The combination of rate adequacy built through 2023 and 2024 filings, moderating replacement cost inflation, and relatively benign catastrophe experience outside of California produced an exceptional result for the majority of carriers.

Workers' compensation continues its extended run of profitability, but the underlying dynamics are shifting. NCCI's State of the Line presentation at AIS 2026 reported a calendar-year combined ratio of 91 for 2025, up five points from 86 in 2024. That deterioration looks worse than it is in context: reserve redundancy declined from $16 billion to $14 billion, meaning the favorable prior-year development that suppressed the 2024 calendar-year result is being consumed. The accident-year combined ratio stands at 102, meaning current business is marginally unprofitable before any reserve releases. Lost-time claim frequency declined 2% in 2025, but medical severity ran at 4% and indemnity severity at 4%, with California posting an accident-year combined ratio of 129, above 100 for five consecutive years in a state that represents 20% of the national market.

General liability and commercial auto remain the persistent weak spots. Jason Kurtz noted that "litigation pressures and claims severity trends continue to result in elevated loss costs, constraining improvement in these segments despite broader industry strength." These two lines are the primary locus of social inflation and nuclear verdict exposure, and their continued underperformance above 100 means the industry's aggregate combined ratio is being carried by the personal lines turnaround and workers' comp releases. For pricing actuaries, the gap between the headline 92.9% industry result and the still-unprofitable casualty lines represents a diversification subsidy that could unwind if personal lines margins compress in a competitive market.

Historical Cycle Context: What Profitability Peaks Tell Us

Analyzing the last three P&C profitability peaks reveals that negative premium growth appearing within 18 months of a cycle-low combined ratio preceded each subsequent deterioration. The pattern is not inevitable, but it is consistent enough that actuaries should account for it in their assumptions.

Cycle Peak	Combined Ratio	ROE	What Followed	Time to Deterioration
2006	Best since mid-1990s	12.7%	2007-2011 soft market; financial crisis compounded losses	12 months
2013	Best in decade at that point	~10%	2014-2017 competitive softening across commercial lines	12 to 18 months
2019	Improved from 2017-2018 cats	~10%	2020-2022 pandemic, social inflation, severity surge	12 months (accelerated by COVID)
2025	92.9 (best since 2006)	15%	?	Premium growth already negative

The mechanism is straightforward. Exceptional profitability attracts capital and emboldens growth strategies. Carriers with strong balance sheets, flush from a year or two of elevated returns, begin competing for market share by offering rate concessions. Reinsurance capacity expands as reinsurers also report strong results, reducing the cost of risk transfer and enabling primary carriers to write at thinner margins. Brokers, sensing the shift, push for better terms. Within two to four quarters, the competitive pressure has eroded enough rate adequacy to begin compressing margins.

Swiss Re's characterization of 2025 as the "cyclical peak" aligns with this framework. Their forecast projects the industry ROE declining from 15% in 2025 to 12% in 2026 and 10% in 2027. Nominal premium growth is expected to trough at approximately 3% in 2026 before normalizing to 3.5% in 2027. AM Best's independent projection calls for a combined ratio deterioration from 92.9% in 2025 to 96.9% in 2026, a nearly four-point swing. Fitch forecasts a similar range of 96% to 97% for 2026.

Three independent rating agencies converging on essentially the same forecast, with combined ratios deteriorating by three to four points and ROE declining by three to five points, is unusual. The consensus is not that the industry faces a crisis; rather, it is returning to mid-cycle profitability levels that are sustainable but significantly less impressive than the 2025 peak. The risk, as always, is that the competitive dynamics overshoot the soft landing and push results into unprofitable territory by 2027 or 2028.

Why the Industry Is Shrinking at Peak Profitability

The negative 3.7% premium growth forecast seems counterintuitive when profitability is at its best level in nearly two decades. Several factors explain the divergence.

Rate adequacy has reduced the need for further rate increases. When combined ratios are in the low 90s, regulators and competitive dynamics make it difficult to justify continued double-digit rate increases. Personal auto rate filings, which ran at 10% to 15% annually through 2023 and 2024, have decelerated to low single digits. Homeowners rate filings outside of catastrophe-exposed states have similarly moderated. The premium growth that came from rate increases through the hard market is no longer available at the same magnitude.

Exposure growth has slowed. Auto unit counts, housing starts, and commercial property values have all decelerated as the economy navigates higher interest rates and tariff uncertainty. Premium is a function of rate times exposure, and when both components decelerate simultaneously, the top line contracts.

Competitive dynamics are accelerating. Property catastrophe reinsurance rates fell 14% to 25% at the January and April 2026 renewals, per Gallagher Re's First View. That decline transmits directly to primary property pricing. Chubb CEO Evan Greenberg characterized the property softening pace as happening "at a pace I'll only describe as dumb," while non-renewing business where rates dropped 30% to 40%. When the most disciplined underwriter in the market is walking away from business at current prices, the volume being written at those prices is coming at the expense of margin.

The tariff overhang introduces asymmetric severity risk. While replacement cost growth is projected at 2.1% for H1 2026, the tariff-driven inflation in auto parts and construction materials creates a forward-looking severity risk that current premium rates may not fully reflect. APCIA estimates a 2.7% increase in collision repair costs from tariffs alone, with $3.4 billion in added premiums needed across auto lines. If the severity materialization outpaces the rate filing cycle, the combined ratio improvement could reverse more quickly than the consensus expects.

Actuarial Implications: Rate Filing Strategy

For pricing actuaries preparing rate indications for 2027 effective dates, the Triple-I/Milliman data creates a specific challenge: explaining why rate increases are still needed when the industry just posted its best results in two decades.

The answer lies in the gap between calendar-year and accident-year results. AM Best's accident-year combined ratio of 94.9, adjusted for the $18.1 billion in favorable reserve development, is the number that reflects the current cost of writing business. That is nearly two points worse than the calendar-year result, and the favorable development that bridges the gap is a finite resource. Fitch expects reserve releases will not repeat at the same scale in 2026 and 2027.

Rate indications should separate the trend selection from the current-year result. A personal auto book showing a 91.8% combined ratio in 2025 may need 3% to 5% rate just to maintain that level if:

Tariff-driven parts and materials inflation runs at 2% to 3% above the embedded trend assumption
Frequency trends, which bottomed during the pandemic and have been gradually returning to pre-2020 levels, continue their upward drift
The favorable reserve development on 2022 and 2023 accident years, which flattered 2025 calendar-year results, does not repeat on 2024 and 2025 vintages

For casualty lines, the situation is more acute. General liability and commercial auto remain above 100 combined ratio, and social inflation continues to drive loss development above historical patterns. Actuaries should document the basis for their trend selections with particular care, citing the Triple-I/Milliman data alongside carrier-specific development experience. Under ASOP No. 25 (Credibility Procedures), the question of how much weight to give the industry-wide improvement versus line-specific deterioration in casualty becomes a credibility-weighting exercise that should be explicit in the rate filing documentation.

Reserve Review Considerations

The growth-profitability divergence has direct implications for reserve adequacy reviews. When premium volume contracts, the denominator in the combined ratio shrinks. If losses do not contract proportionally (and they rarely do when driven by litigation trends and severity inflation), the combined ratio deteriorates even without any change in absolute loss levels.

Reserving actuaries should pay particular attention to four dynamics in their next review cycle.

First, the calendar-to-accident-year gap is a leading indicator. The 92.9% versus 94.9% gap in 2025 means the industry is borrowing approximately two points of profitability from prior-year releases. As the hard-market vintages (2020 through 2024) mature, the remaining redundancy will shrink. For carriers that have been releasing reserves aggressively, the inflection point where calendar-year results worsen may arrive sooner than the aggregate industry data suggests.

Second, the line-of-business mix matters more in a contracting market. A carrier that is disproportionately concentrated in general liability or commercial auto, the two lines still above 100, faces a different reserve risk profile than one weighted toward personal auto and homeowners. The overall industry combined ratio is a weighted average that obscures this distinction. Reserve reviews should stress test the carried reserves under a scenario where personal lines margins compress by three to four points (consistent with the AM Best 2026 forecast) while casualty lines remain above breakeven.

Third, IBNR adequacy for the 2024 and 2025 accident years needs scrutiny. These accident years benefited from the tail end of the hard market's rate adequacy. If the 2026 premium contraction reflects competitive pressure that began building in late 2025, the rate levels applied to the most recent accident months of AY 2025 may already embed the early stages of competitive concessions. The IBNR for these months should be calibrated against the development patterns emerging from the AY 2021 through 2023 vintages, where casualty adverse development of $15.8 billion has expanded beyond the traditionally problematic soft-market vintages.

Fourth, workers' compensation reserve releases are decelerating. NCCI's data showing reserve redundancy falling from $16 billion to $14 billion, combined with the accident-year combined ratio of 102, means the WC line is no longer the reliable source of favorable development that it was from 2014 through 2024. For carriers that relied on WC releases to offset casualty adverse development, the reserve adequacy math changes when that offset shrinks.

Capital Allocation in a Contracting Market

Capital management actuaries face a distinct set of questions when premium volume shrinks while surplus grows. The industry's $60.9 billion in net underwriting income, combined with robust investment income, has pushed surplus to elevated levels. When premium contracts by 3.7%, the premium-to-surplus leverage ratio declines mechanically, meaning the industry is over-capitalized relative to the business it is writing.

Historically, excess capital in a soft market flows toward four destinations: share buybacks, special dividends, M&A premiums, and rate competition. The first two are shareholder-friendly; the second two tend to destroy underwriting value. The capital allocation decision at the enterprise level has direct actuarial implications because it determines how much capital is available to absorb adverse deviation if results deteriorate toward the 96% to 97% combined ratio that rating agencies project for 2026.

For carriers that choose to deploy excess capital into growth, the pricing actuary must assess whether the business being acquired through competitive pricing generates adequate risk-adjusted returns. In a market where the industry's best underwriters (Chubb, Travelers) are either walking away from business or explicitly flagging pricing as inadequate, the marginal business available for growth is disproportionately likely to be adversely selected on price.

The dynamic risk-based capital framework should incorporate scenario testing where the combined ratio reverts to 96% to 97% over two years while premium volume remains flat or negative. If the carrier's capital plan assumes premium growth funding an expanding investment portfolio, that assumption needs to be revised for a contracting-market scenario. The NAIC's RBC system does not explicitly capture cycle dynamics, so the responsibility falls on the appointed actuary and the enterprise risk management function to model the path dependency between premium volume, reserve adequacy, and capital consumption.

The Reinsurance Feedback Loop

Reinsurance market dynamics amplify the primary market cycle. The 14% to 25% property catastrophe rate declines at January and April 2026 renewals reflect reinsurer confidence in the current profitability environment. Munich Re reported Q1 2026 net profit of EUR 1.7 billion, up 57% year over year. Swiss Re's results were similarly strong. When reinsurers are profitable, they expand capacity and compete on price, which reduces primary carriers' ceded premium costs and enables those carriers to either improve margins or offer more competitive primary rates.

The feedback loop works in both directions. If primary premium contracts and catastrophe losses return to normal or above-normal levels on a smaller base, reinsurer profitability compresses. Reinsurers respond by tightening terms and raising rates at the next renewal, which forces primary carriers to either absorb the increased ceded costs or pass them through in rate filings. The transmission lag between the primary soft market and the reinsurance correction is typically 12 to 24 months, consistent with the historical pattern where the post-peak deterioration becomes visible in the second year after the combined ratio trough.

For actuaries working on ceded reinsurance programs, the current environment presents an opportunity to lock in favorable terms on multi-year treaties while reinsurer capacity is abundant. The trade-off is that multi-year commitments at soft-market rates may leave the carrier exposed if loss trends deteriorate and the reinsurance market hardens before the treaty expires.

Why This Matters for Actuaries

The Triple-I/Milliman Forward View provides a data-anchored framework for a market transition that actuaries across all functions will navigate over the next 12 to 24 months. The core message is straightforward: the industry's best combined ratios in nearly 20 years are coinciding with its first premium contraction in six years. Every prior instance of this pattern has preceded a period of competitive erosion and margin compression.

The actuarial response should be equally straightforward. Pricing actuaries need to anchor rate indications to accident-year fundamentals, not calendar-year results inflated by reserve releases. Reserving actuaries need to stress test carried reserves against a three-to-four-point combined ratio deterioration scenario that all three major rating agencies independently project. Capital actuaries need to model the premium contraction explicitly rather than assuming growth in their capital deployment plans.

This is not a prediction of a catastrophic cycle turn. The consensus view, shared by AM Best, Fitch, Swiss Re, and the Triple-I/Milliman team, is that the industry returns to mid-cycle profitability in the 96% to 97% combined ratio range by 2026 or 2027. The risk is not that the industry becomes unprofitable; it is that the transition from 93% to 97% happens faster than current reserve assumptions and capital plans contemplate, particularly if a significant catastrophe event or an acceleration in social inflation litigation costs compounds the competitive softening.