Commercial Lines


Property/casualty insurance can be broken down into two major categories: commercial lines or types of insurance and personal lines. Personal lines, as the term suggests, includes coverages for individuals—auto and homeowners insurance. Commercial lines, which accounts for about half of U.S. property/casualty insurance industry premium, includes the many kinds of insurance products designed for businesses.

Commercial insurance performs a critical role in the world economy. Without it, the economy could not function. Insurers essentially protect the economic system from failure by assuming the risks inherent in the production of goods and services. For further information on commercial lines see the Commercial Insurance website.

There are over seven million small businesses in the U.S., ranging from construction firms to grocery stores to home-based businesses. All have one thing in common: Without the right insurance coverage, each could be wiped out by a disaster or a lawsuit. In addition, almost all businesses are accountable for the safety of their workers and bear responsibility for injuries suffered on the job. The I.I.I.’s Insuring Your Business website provides information on what coverages businesses should consider as well as what business owners should know about risk management and loss control. (See small business.)



($ billions)

(1) After reinsurance transactions, excludes state funds.
(2) Before reinsurance transactions; includes some state funds.
(3) Includes international and miscellaneous coverages.
(4) Includes federally sponsored multiple peril crop and private market crop-hail.
(5) Premiums from certain insurers that write health insurance but file financial statements with state regulators on a property/casualty rather than life/health basis.
(6) Only includes nonproportional reinsurance, an arrangement in which a reinsurer makes payments to an insurer whose losses exceed a predetermined amount.
(7) Coverages protecting against legal liability resulting from negligence, carelessness or failure to act.

Source: SNL Financial LC.

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Source: SNL Financial LC.

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Top 10 Writers Of Commercial Lines Insurance By Direct Premiums Written, 2015


Rank Group/company Direct premiums written (1) Market share (2)
1 American International Group (AIG) $16,980,061 5.8%
2 Chubb Ltd. (3) 16,675,193 5.7
3 Travelers Companies Inc. 16,347,492 5.6
4 Liberty Mutual 13,801,267 4.7
5 Zurich Insurance Group (4) 13,403,445 4.6
6 CNA Financial Corp. 9,203,419 3.2
7 Nationwide Mutual Group 8,401,984 2.9
8 Hartford Financial Services 7,478,308 2.6
9 Berkshire Hathaway Inc. 7,056,856 2.4
10 Tokio Marine Group 5,956,554 2.0

(1) Before reinsurance transactions, includes state funds.
(2) Based on U.S. total, includes territories.
(3) Chubb Ltd. data reflects the 2015 merger with Ace Ltd.
(4) Data for Farmers Insurance Group of Companies and Zurich Financial Group (which owns Farmers' management company) are reported separately by S&P Global Market Intelligence.

Source: NAIC data, sourced from S&P Global Market Intelligence, Insurance Information Institute.

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