On October 29, 2026, The Hanover Insurance Group reported third-quarter results, summarized by Reinsurance News and detailed in its 8-K earnings exhibit. Group net income was $172.6 million, the combined ratio was 92.3% (up from 91.1%), and the group current accident year loss and loss adjustment expense ratio excluding catastrophes fell 1.9 points to 55.7%. The Core Commercial segment looks different: a 100.5% combined ratio, up from 97.3%, with just $3.0 million (0.5 points) of favorable prior-year development, against $1.2 million (0.2 points) a year earlier.
Why the headline is not a benchmark
Many self-insureds set the expected claim ratio (ECR, the loss ratio assumed for an immature year before their own claims mature) by glancing at carrier results. The Core Commercial numbers show why the reported ratio misleads. Strip the two items that do not describe the current year:
| Core Commercial, Q3 | 2026 | 2025 |
|---|---|---|
| Reported combined ratio | 100.5% | 97.3% |
| Less catastrophe losses (points) | 7.8 | 3.2 |
| Plus favorable prior-year development (points) | 0.5 | 0.2 |
| Current accident year combined ratio, ex-cat | 93.2% | 94.3% |
All inputs come from the Hanover exhibit; the subtotals are our arithmetic. The reported ratio rose 3.2 points, but the underlying current-year ratio improved 1.1 points. Catastrophes, up $27.5 million to $45.3 million, drove the headline. Prior-year development moved the figure by 0.3 points, so it was not the distortion this quarter. The segment’s current-year ex-cat loss ratio was 60.5%, almost five points above the 55.7% group figure, which blends in personal lines.
Who it affects
Self-insured employers, captives, and public-entity pools with commercial property, general liability, or auto retentions that cite carrier loss ratios in ECR memos. Workers’ compensation pricing is its own market; this is a commercial package benchmark.
The reserve mechanism
Two levers sit inside a carrier ratio. The expected claim ratio sets the current year. Development pattern drives the prior-year line. Hanover’s small release (group prior-year development of 1.1 points favorable in the quarter and 1.4 points over nine months) suggests it is not leaning on old-year redundancy to flatter the current year. That makes its ex-cat current-year number cleaner than a carrier that is releasing heavily. Compare the older-year strengthening in Chubb’s Q3 and Everest’s Q3, and the release-with-higher-current-year pattern in CNA’s Q3. Dispersion across carriers is wide, so no single carrier is a benchmark.
Even a clean 60.5% is a pooled, priced book with a 7.4% average renewal price increase (per the Hanover release), expenses, and a mix your retention does not share. It is a cross-check on trend direction, not a number to import.
Our read
Hanover’s current-year ratio is improving while prior years stay near zero. That reads as price catching trend in commercial lines, not as reserve cushion. Expect that to hold unless the Q4 reserve review or the 10-K segment development table shows Core Commercial releases moving off 0.5 points. We have not verified the nine-month dollar split by segment; the exhibit gives nine-month ratios only.
What this means for your next review
Ask your actuary whether the latest-year ECR is built from your own experience, an industry benchmark, or a carrier loss ratio, and whether the carrier figure was stripped of catastrophes and prior-year development first. Under Bornhuetter-Ferguson, that prior expectation carries most of the weight for open years, so an unstripped input flows straight into IBNR. The expected loss ratio method explainer covers the mechanics, and the five leading indicators piece lists what to monitor next.