• Deposit premium is (1) In property and casualty insurance, the premium deposit required by an insurer under forms of insurance subject to periodic premium adjustments. Also called “pre-bonus”. (2) In reinsurance, the amount of the premium (usually for the excess of a loss reinsurance contract) that the ceding company pays periodically to the reinsurer during the term of the contract. This amount is generally determined as a percentage of the estimated amount of the premium that the contract will produce, based on the rate and the assumed premium. It often coincides with the minimum premium, but can be higher or lower. The deposit premium will be adjusted depending on which of these amounts is higher: the actual premium or the minimum premium after the actual insurance premium has been determined by auditing or reporting the actual insured risks during the coverage period.