Arch filed in Hawaii to adopt the Hawaii Insurance Bureau’s amended businessowners advisory loss costs, with a requested effective date of June 1, 2026 for both new and renewal business. The filing covers businessowners reference filings and calls for an overall rate increase of 18.9%, following a prior 9.3% revision that took effect on February 1, 2025.

Arch said it will keep its current loss cost multipliers unchanged at 1.957 for BOP property and 1.768 for BOP liability, even as it adopts the updated HIB loss costs. According to the filing, the proposed change would affect eight policyholders in Hawaii and increase written premium for the program by $21, from $112 in current written premium.

The company described the filing as an adoption of HIB Reference Number BP-2025-RLA1, tied to advisory circular BO 2025-02. For property, Arch’s filing shows a 5.1% loss cost modification factor and a selected underwriting profit and contingencies provision of 7.9%, implying an after tax return on equity of 16.1%. For liability, the filing shows a 2.8% loss cost modification factor and a 4.5% underwriting profit provision, implying an after tax return on equity of 16.4%.

The filing is not yet cleared. Hawaii regulator Grant Shintaku placed it in abeyance on March 12 and asked Arch to explain why an expense reduction referenced in RF 20A should not lead to a lower rate level for policyholders, noting that Exhibit I did not provide that explanation. Arch has until April 10, 2026 to respond before the filing could be returned as not filed and not available for use.