Spreading the Risk
Because a number of people enter into similar agreements with the same company, the number of people paying into the pool is large. Because there are more people contributing to the pool than there are making claims on the pool, the company should have enough to pay whoever files a claim with them.
This  is called “spreading the risk” or “common funding.” Because the company has to  be able to calculate the chance of something happening, you are obliged to give  them specific information that they can use to work out the risk of them having  to pay you during the agreed period. The agreement is a contract of “good faith.”  If anyone does not tell the company the whole truth, the company may not  properly work out what an individual’s payment should be, and may be able to  refuse to pay if an incident occurs.
The  agreement with an insurance company is a policy or contract of insurance; the amount  you pay is a premium; and the amount  the insurance company pays is an indemnity. 
Indemnity 
An “indemnity” is an amount that restores you  to the same financial position that you were in immediately before the  incident. This could be the whole amount that you agreed on with the insurance  company or a portion of it that matches the cost you incurred, if it is less  than the whole amount you agreed at the start. The amount you agreed is called  the sum insured and is the amount  that you and the insurance company agreed was the maximum amount that you would  be able to claim. For example, for a house destroyed by a fire or hurricane this  would be the cost of its reconstruction, and the removal of all debris and so  on, but is unlikely to include the cost of the land, as you would still own  this. 
Common Fund
So insurance,  in its basic form, is a group of people who pool money into a common fund.  When someone in the group suffers a loss,  such as damaging their car in an accident, they can use the common fund to fix  their car.  If someone keeps getting into  accidents and taking money from the fund, whoever is running the fund will say  that they should pay more because they represent a higher risk to the whole fund.  Similarly, for example, if there is a year  when bad weather hits the islands, many people would have losses and have to  draw from the common fund.  It may be  that the next year, everyone will have a higher premium to ensure that the fund  pool is able to meet the cost of a similar storm should one occur
Due  to its small population compared to, say the USA, there will be fewer people  putting money into the fund so consumers in the BVI may pay higher premiums (put  more money in the common fund) than they might have to elsewhere. 
How much Insurance do you pay?
The  amount you pay (your premium) for an insurance policy will be based on the  information you provide to the insurance company, the type of risks that you  want to insure against, and the statistical chance of the risk happening.  An insurance policy usually states the length  of time that the insurance will cover (the  term) which could be for six months or a year for auto insurance or “the  rest of your life” for life insurance.   You can pay for the term in a lump sum or by regular monthly or weekly installments.
Some  countries have a type of insurance called Social  Security where you must pay an amount of your wage into a “social fund” and  you can claim money from the social fund under certain circumstances.  This is usually a mandatory payment.
Some  types of insurance such as auto insurance are compulsory – that means you are  required by BVI law to have coverage if you drive a motor vehicle.  Most insurance is not compulsory; you can  choose whether you want to buy it, what type of insurance you would like to  have, and which insurance company you will buy your policy from.