A form of pro rata reinsurance (or proportional reinsurance) indemnifying the ceding company for an established percentage of loss on each risk covered in the contract in consideration of the same percentage of the premium paid to the ceding company. This may also be known as “first dollar ground up” reinsurance although it can be used for “Excess” original business such as original Umbrella or Excess policies.
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A type of pro rata or proportional reinsurance agreement under which the insurer and reinsurer agree to share a predetermined portion of all insurance, premium, and losses. The primary insurer’s retention in a quota share agreement is expressed as a percentage of the amount insured.

The Ceding Company binds herself to retain for own account a fixed proportion of all its business in a class, up to a limit, and cede a fixed proportion of all business up to an agreed amount to the Reinsurer, and give the corresponding proportion of the premium income.
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A reinsurance treaty which provides that the reassured shall cede to the reinsurer a specified percentage of all the premiums that it receives in respect of a given section or all of its underwriting account for a given period in return for which the reinsurer is obliged to pay the same percentage of any claims and specified expenses arising on the reinsured account.