US commercial insurance rates rose just 2.5% in the first quarter of 2026, marking the third consecutive quarter of decelerating increases and the softest reading in several years — a structural turning point that diverges sharply by line of business and carries direct consequences for carrier combined ratios and broker organic growth trajectories.
How the WTW CLIPS Composite Turned in One Quarter
The speed of the deceleration is striking. According to data tracked by the WTW Commercial Lines Insurance Pricing Survey (CLIPS), the aggregate US commercial rate stood at 2.9% in Q4 2025, itself already down sharply from 5.6% in Q4 2024. The first-quarter 2026 reading of 2.5% extends that compression, arriving at less than half the 5.3% pace recorded in Q1 2025 — a year-over-year halving in twelve months.
The CLIPS survey methodology deserves context. The index covers approximately 20% of the US commercial insurance market, excluding state workers’ compensation funds, and draws on 41 participating insurers. Its breadth makes it one of the most reliable forward-looking proxies for commercial pricing across the industry cycle. The prior quarter’s report had already flagged that commercial property had entered price-decrease territory — a signal that the broader softening was not limited to liability lines. What the first-quarter 2026 data confirms is that the deceleration is now aggregate, not isolated.
The trajectory has roots further back. As WTW noted in October 2025, nearly every commercial line of insurance — aside from excess casualty — had already moved into soft-market territory by that point. That observation, made mid-cycle, is now reflected in a headline rate that has crossed below recent lows for the first time in the current cycle.
Property, Cyber, and D&O: The Lines Pulling the Composite Down
The aggregate masks a more dramatic story at the sub-line level. Data from Risk & Insurance shows that average commercial premiums across all account sizes fell -1.2% in Q1 2026, ending a 33-quarter streak of consecutive increases — a streak that had persisted through inflation spikes, catastrophe years, and the COVID disruption.
Commercial property led the decline with a -5.5% print in Q1 2026, a sharp acceleration from -0.7% in the prior quarter. This is a line that saw extraordinary hardening through 2022 and 2023 driven by natural catastrophe losses and reinsurance repricing. The reversal to mid-single-digit decreases reflects a combination of increased carrier appetite, reinsurance capacity recovering, and buyers with clean loss histories pushing back hard at renewal. Shared-and-layered programs had already been seeing steeper discounts — WTW pricing data showed property renewal rates down 8% on average in Q2 2025, with shared-and-layered programs recording drops of up to 20%.
Cyber followed a parallel path. After years of double-digit rate increases driven by ransomware loss experience, the line recorded -3.5% in Q1 2026. This repricing reflects improved insured cyber hygiene (MFA adoption, endpoint detection requirements), more rational claims experience, and a significant influx of capacity from both incumbents and new entrants. Directors and officers liability came in at -2.1%, consistent with its multi-year softening trend as securities class action frequency moderated. Workers’ compensation continued its chronic softness at -3.7%, a line that has been structurally profitable for carriers for several years, attracting persistent competition. The pattern held into May 2026, with workers’ comp renewal rates at -1.31% that month, up fractionally from -1.35% in April — still firmly negative.
These figures carry immediate implications for carriers’ underwriting margins. The US P&C industry logged its best Q1 underwriting margin in 25 years — a result achieved in a pricing environment that was still positive in most segments. As those rate tailwinds turn to headwinds in property and liability, sustaining that margin trajectory will require disciplined underwriting and expense management rather than rate leverage alone.
Commercial Auto at 59 Consecutive Increases: The Last Hard-Market Holdout
Against the broad softening, one line stands alone. Commercial auto recorded +5.8% in Q1 2026, its 59th consecutive quarter of rate increases — a streak that stretches back over fourteen years and has outlasted every other hard-market episode in the commercial lines universe. The persistence is structural: social inflation driving nuclear verdicts in auto liability, claims severity amplified by medical cost trends, and repair costs that remain elevated despite easing supply-chain pressures.
Critically, the Q1 reading represents a moderation within the streak. Commercial auto fell below double-digit increases for the first time since Q3 2023, a signal that even this most stubborn of hard-market lines is beginning to respond to cumulative rate adequacy gains. The May 2026 renewal data reinforces this: commercial auto renewal rates came in at 4.96% in May, down from 5.24% in April, while umbrella — which is closely linked to auto liability — held at 8.01%.
For carriers heavily weighted toward commercial auto, the trajectory matters enormously. The line has been one of the few contributors of organic premium growth in a softening environment. As it moderates toward the mid-single-digit range, the revenue mix shift will become meaningful — particularly for those whose personal auto books are simultaneously under pressure from competitive forces.
AM Best’s Combined Ratio Warning and What Rate Deceleration Costs Carriers
The rate picture feeds directly into the underwriting profitability debate. AM Best projects the P/C industry combined ratio will rise to 96.9 in 2026, up 1.9 points from 95.0 in 2025 — a deterioration that is already embedded in analysts’ forward estimates. For commercial lines specifically, AM Best forecasts a combined ratio of 96.3 in 2026 versus 95.8 in 2025.
The agency’s language is precise on the mechanism: “premium volume expected to be constrained as year-over-year rate changes flatten.” In practical terms, this means earned premium growth — which lags written premium changes by 12-18 months — will begin to slow materially through 2026 and into 2027 even if rates stabilize at current levels. Carriers that ran combined ratios in the low-to-mid 90s during the hard-market peak will face compression unless loss costs simultaneously moderate. Net premiums written already grew 6.1% in 2025, down from 8.7% in 2024, signaling that the deceleration in the income statement has already begun.
The broker dimension is equally instructive. WTW’s first-quarter results showed Q1 2026 revenue of $2.41 billion, an 8% year-over-year gain, but organic growth of 3% trailed Aon at 5% and Marsh at 4%. The gap matters: in a softening pricing environment, commission and fee income tied to premium volume grows more slowly, making new business wins and retention rates the primary levers. WTW’s own commentary acknowledged “a more challenging global market” while pointing to efficiency gains as the margin offset — a posture that the other major brokers will need to replicate as rate support fades further. Aon’s own leadership reshuffles in EMEA reflect the broader repositioning underway across the large broker segment.
Mini-FAQ
What does the WTW CLIPS survey measure and how representative is it?
Why has commercial auto kept rising while every other major line is flat or declining?
What does the rate deceleration mean for carriers and brokers?
Sources
- GlobeNewswire – WTW CLIPS press release
- Risk & Insurance, Commercial P&C market shifts into reverse as soft market takes hold
- Insurance Business Magazine, US commercial renewal rates soften across most lines — May 2026
- Carrier Management / WTW, Nearly every commercial line in soft-market territory — October 2025
- Insurance Business Magazine – WTW revenue analysis
