The amount of insurance or reinsurance on a risk (or occurrence) that applies to a loss before the next higher excess layer of insurance or reinsurance attaches.
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The amount of loss which attaches before the next higher excess layer of insurance or reinsurance attaches.

A clause in a reinsurance treaty reserving control of underwriting and claims negotiation to the reinsurer.

Depending on the context this term may refer to: (a) a member’s allocated capacity (b) syndicate allocated capacity, with or without the addition of cover from qualifying quota share reinsurance; (c) the total underwriting capacity of all syndicates combined, with or without the addition of cover from qualifying quota share reinsurance; or (d) the underwriting capacity of an insurance company or a reinsurance company. Underwriting stamp The stamp that is applied to a slip by an underwriter to signify his acceptance of a risk. It shows the number and pseudonym of the syndicate or the name of the (re)insurance company for whom the underwriter acts and has a space for his underwriting reference to be inserted. The underwriter will insert his line on a slip next to his underwriting stamp.******The maximum amount of money an insurer or reinsurer is willing to risk in a single loss event on a single risk or in the aggregate on all risks in a given period. This is the limit of capacity for an insurer or reinsurer that may also be imposed by law or regulatory authority. Common NAIC aggregate underwriting capacity is 3:1 (i.e.three dollars of premium for each dollar of surplus) depending on line of business. Many states also impose a per risk limit of 10% of surplus.*****
The risk retention ability of an insurer or of the insurance industry as a whole. Determined by the amount of surplus.
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US: The risk retention ability of an insurer or of the insurance industry as a whole. Determined by the amount of surplus.

To provide protection in the event of loss caused to one risk or loss arising from one event as the case may be. In contrast to Catastrophe or per event covers.

In rating the use of all premium written as arising from all policies written or renewed during the year and all losses relating to those same policies, whenever they occur.

Portion of a property or liability Insurance premium equal to the unexpired portion of the period for which the total premium has been paid. The unearned premium equals the gross premium minus the earned premium. Thus, for an annual Policy, at the end of the first month of coverage, eleventh-twelfths of the premium is unearned.*****That part of the original premium not yet earned by the Insurance Company and therefore due to the Policy-holder if the Policy should be cancelled.*****
That portion of an insurance premium that would have to be returned to the insured if the policy were canceled.
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That portion of the original premium that applies to the unexpired portion of risk A fire or casualty insurer or reinsurer must carry a reserve against all unearned premiums as a liability in its financial statement, for if the policy should be cancelled, the company would have to pay back the unearned part of the original premium.
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The proportion of premium that relates to the unused period of cover.
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The fraction of the premium which has remained unused during the time frame in which the premium was paid.
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That portion of the policy premium that has not yet been “earned” by the company because the policy still has some time to run before expiration. A property or casualty insurer must carry all unearned premiums as a liability in its financial statement since, if the policy should be canceled, the insurer would have to pay back a certain part of the original premium.

The sum of all unearned premium for in force policies of insurance under the reinsurance agreement, often with respect to a particular block, book or class of business during a particular period.
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UK: an amount payable by a cedant to a reinsurer in consideration of the reinsurer accepting liability for all or part of the liability arising under a contract of reinsurance for claims occurring after a specified date under all or certain underlying contract incepting prior to that date.