Methods of Insurance

 Methods of Insurance According to the study books of The Chartered Insurance Institute, there are variant methods of insurance as follows:

Co-insurance – risks shared between insurers (sometimes referred to as "Retention")

Dual insurance – having two or more policies with overlapping coverage of a risk (both the individual policies would not pay separately – under a concept named contribution, they would contribute together to make up the policyholder's losses. However, in case of contingency insurances such as life insurance, dual payment is allowed)

Self-insurance – situations where risk is not transferred to insurance companies and solely retained by the entities or individuals themselves

Reinsurance – situations when the insurer passes some part of or all risks to another Insurer, called the reinsurer.

Insurance Methods

Underwriting and investing

Insurers' business model aims to collect more in premium and investment income than is paid out in losses, and to also offer a competitive price which consumers will accept. Profit can be reduced to a simple equation:

Profit = earned premium + investment income – incurred loss – underwriting expenses.

Insurers make money in two ways:

Through underwriting, the process by which insurers select the risks to insure and decide how much in premiums to charge for accepting those risks, and taking the brunt of the risk should it come to fruition.

By investing the premiums they collect from insured parties

The most complicated aspect of insuring is the actuarial science of ratemaking (price-setting) of policies, which uses statistics and probability to approximate the rate of future claims based on a given risk. After producing rates, the insurer will use discretion to reject or accept risks through the underwriting process.

At the most basic level, initial rate-making involves looking at the frequency and severity of insured perils and the expected average payout resulting from these perils. 

Thereafter an insurance company will collect historical loss-data, bring the loss data to present value, and compare these prior losses to the premium collected in order to assess rate adequacy. 

Loss ratios and expense loads are also used. Rating for different risk characteristics involves - at the most basic level - comparing the losses with "loss relativities"—a policy with twice as many losses would, therefore, be charged twice as much. 

More complex multivariate analyses are sometimes used when multiple characteristics are involved and a univariate analysis could produce confounded results. Other statistical methods may be used in assessing the probability of future losses.

Upon termination of a given policy, the amount of premium collected minus the amount paid out in claims is the insurer's underwriting profit on that policy. Underwriting performance is measured by something called the "combined ratio", which is the ratio of expenses/losses to premiums. 

A combined ratio of less than 100% indicates an underwriting profit, while anything over 100 indicates an underwriting loss. A company with a combined ratio over 100% may nevertheless remain profitable due to investment earnings.

Insurance companies earn investment profits on "float". Float, or available reserve, is the amount of money on hand at any given moment that an insurer has collected in insurance premiums but has not paid out in claims. Insurers start investing insurance premiums as soon as they are collected and continue to earn interest or other income on them until claims are paid out. 

The Association of British Insurers (grouping together 400 insurance companies and 94% of UK insurance services) has almost 20% of the investments in the London Stock Exchange. In 2007, U.S. industry profits from float totaled $58 billion. In a 2009 letter to investors, Warren Buffett wrote, "we were paid $2.8 billion to hold our float in 2008".

In the United States, the underwriting loss of property and casualty insurance companies was $142.3 billion in the five years ending 2003. But overall profit for the same period was $68.4 billion, as the result of float. 

Some insurance-industry insiders, most notably Hank Greenberg, do not believe that it is possible to sustain a profit from float forever without an underwriting profit as well, but this opinion is not universally held. Reliance on float for profit has led some industry experts to call insurance companies "investment companies that raise the money for their investments by selling insurance".