Inland marine rate filings in California (2026)
Every carrier writing inland marine coverage in California files its rates and rating rules with the state's insurance regulator — the primary-source records behind every inland marine quote in California. This page tracks the 169 active inland marine filing(s) on record for California, filed by 27 distinct carrier(s).
Inland marine rate filings in California are reviewed by the California Department of Insurance. The governing authority is California Insurance Code §1631 et seq. (licensing) · Labor Code §3700 (WC mandatory). You can confirm any California carrier or agent is licensed with the state's license-lookup tool. A inland marine premium in California is built from each carrier's filed base rates and rating rules applied to your business's exposure — the classification of your operation and the rating basis for this line. Because every carrier files its own rates and loadings, two California businesses with the same profile can be quoted very different inland marine premiums, which is exactly why comparing multiple carriers is the only reliable way to see where you land.
Carriers with inland marine filings on record in California include MARKEL INSURANCE COMPANY, ARCH INSURANCE COMPANY, MARKEL AMERICAN INSURANCE COMPANY, TRAVELERS INDEMNITY COMPANY OF CONNECTICUT (THE), NEXT INSURANCE US COMPANY, CLEAR BLUE INSURANCE COMPANY, ACCREDITED SURETY AND CASUALTY COMPANY, INC., NATIONWIDE AGRIBUSINESS INSURANCE COMPANY, CHUBB NATIONAL INSURANCE COMPANY, AMERICAN BANKERS INSURANCE COMPANY OF FLORIDA, MASSACHUSETTS BAY INSURANCE COMPANY, NORTHLAND INSURANCE COMPANY, and 15 more. Disclosed rate changes among these filings range from -48.4% to 44.3%. The most-recent inland marine filing we track for California is effective July 2026. Every row below cites its filing reference so the California regulator record can be verified.
Recent rate-filing activity — 8 state filings across 1 commercial line
Commercial carriers can't charge whatever they want — each state's Department of Insurance must approve loss-cost filings before they take effect. These are primary-source, government-held records available on SERFF Filing Access. Cited below: the most-recent active filings affecting commercial operations, with the real SERFF tracking number for each.
| Line | State | Overall change | Effective | SERFF tracking |
|---|---|---|---|---|
| Inland Marine | CA | filing on record (magnitude not publicly disclosed) | Jul 17, 2026 | MRKB-135003115 |
| Inland Marine | CA | filing on record (magnitude not publicly disclosed) | May 29, 2026 | AICO-G134899752 |
| Inland Marine | CA | filing on record (magnitude not publicly disclosed) | May 29, 2026 | MRKB-134915218 |
| Inland Marine | CA | filing on record (magnitude not publicly disclosed) | May 8, 2026 | AICO-G134914958 |
| Inland Marine | CA | filing on record (magnitude not publicly disclosed) | Mar 6, 2026 | TRVD-134826218 |
| Inland Marine | CA | filing on record (magnitude not publicly disclosed) | Mar 6, 2026 | TRVD-134821666 |
| Inland Marine | CA | 0% overall rate change (filed) | Feb 13, 2026 | NXUS-134766937 |
| Inland Marine | CA | 0% overall rate change (filed) | Nov 28, 2025 | MRTN-134717923 |
Source: SERFF Filing Access (filingaccess.serff.com) — the official public-records interface for state Department of Insurance filings. Loss-cost changes shown are the overall bureau-wide change in each state; the actual impact on your quote depends on your class code, payroll, experience modifier, and carrier-specific loss-cost multiplier (LCM). Get a quote for your exact numbers.
MARKEL INSURANCE COMPANY filed MRKB-135003115 effective July 2026 (active). ARCH INSURANCE COMPANY filed AICO-G134899752 effective May 2026 (active). MARKEL AMERICAN INSURANCE COMPANY filed MRKB-134915218 effective May 2026 (active). ARCH INSURANCE COMPANY filed AICO-G134914958 effective May 2026 (active). TRAVELERS INDEMNITY COMPANY OF CONNECTICUT (THE) filed TRVD-134826218 effective March 2026 (active). TRAVELERS INDEMNITY COMPANY OF CONNECTICUT (THE) filed TRVD-134821666 effective March 2026 (active). NEXT INSURANCE US COMPANY filed NXUS-134766937 effective February 2026 (active). CLEAR BLUE INSURANCE COMPANY filed MRTN-134717923 effective November 2025 (active). ACCREDITED SURETY AND CASUALTY COMPANY, INC. filed PERR-134702067 effective October 2025 (active). NATIONWIDE AGRIBUSINESS INSURANCE COMPANY filed NWPP-134664148 effective September 2025 (active). CHUBB NATIONAL INSURANCE COMPANY filed ACEH-134609948 effective August 2025 (active). MARKEL INSURANCE COMPANY filed MRKB-134616207 effective August 2025 (active). NATIONWIDE AGRIBUSINESS INSURANCE COMPANY filed NWPP-134587609 effective July 2025 (active). NATIONWIDE AGRIBUSINESS INSURANCE COMPANY filed NWPP-134586736 effective July 2025 (active). ARCH INSURANCE COMPANY filed AICO-G134578131 effective June 2025 (active). TRAVELERS INDEMNITY COMPANY OF CONNECTICUT (THE) filed TRVD-134451200 effective March 2025 (active). NATIONWIDE AGRIBUSINESS INSURANCE COMPANY filed NWPP-134371576 effective February 2025 (active). MARKEL INSURANCE COMPANY filed MRKA-134369504 effective February 2025 (active). ARCH INSURANCE COMPANY filed AICO-134363746 effective January 2025 (active). AMERICAN BANKERS INSURANCE COMPANY OF FLORIDA filed 25-489 effective January 2025 (active). MASSACHUSETTS BAY INSURANCE COMPANY filed 25-1929-A effective January 2025 (active). NORTHLAND INSURANCE COMPANY filed 25-1166 effective January 2025 (active). ARCH INSURANCE COMPANY filed AICO-134359830 effective December 2024 (active). NATIONWIDE AGRIBUSINESS INSURANCE COMPANY filed NWPP-134273681 effective October 2024 (active). TRAVELERS INDEMNITY COMPANY OF CONNECTICUT (THE) filed TRVD-134225125 effective September 2024 (active). TRAVELERS INDEMNITY COMPANY OF CONNECTICUT (THE) filed TRVD-133842227 effective September 2024 (active). TRAVELERS CASUALTY COMPANY (THE) filed TRVD-134225146 effective September 2024 (active). TRAVELERS INDEMNITY COMPANY OF CONNECTICUT (THE) filed TRVD-134225145 effective August 2024 (active). CHUBB NATIONAL INSURANCE COMPANY filed ACEH-134099181 effective May 2024 (active). CHUBB NATIONAL INSURANCE COMPANY filed ACEH-134069729 effective May 2024 (active).
Inland marine covers movable or specialized California business property — tools, equipment, and goods in transit — that standard commercial property does not.
Across California, inland marine carriers earned about $4.3B in premiums at a 47.6% loss ratio and a 19.4% underwriting profit (NAIC 2023). That market-level result comes from the NAIC Report on Profitability by Line by State — a primary-source view of how inland marine actually performs in California, beyond any single carrier's filing.
Key takeaways for California inland marine
- California inland marine rate filings are public, primary-source records — every figure here traces to a filing reference you can verify with the state regulator.
- Your actual California inland marine premium depends on your classification, exposure basis, and each carrier's filed rates and loadings — the filings below are the starting point, not a single market price.
- Comparing quotes from multiple carriers is the only way to see how California inland marine rates differ for your specific operation.
Get a real California inland marine quote
These filings are the regulator-held record — your actual inland marine premium depends on your classification, exposure basis, and each carrier's filed rates and loadings. Request a free California quote in under 90 seconds.
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Figures summarized here are drawn from public California Department of Insurance rate filings and, where shown, the NAIC Report on Profitability by Line by State — each traceable to its source. No proprietary rating-manual content is reproduced. See our full sourcing policy.