Systems and methods for use in settling mass tort claims are disclosed for determining insurance premiums for asymptomatic claimants in order to provide an insured defined monetary benefit in the event of a future emergence of critical injuries associated with exposure to injurious substances or conditions. Asymptomatic claimant risk classification data are entered for each settling claimant. Mortality and critical injury tables are determined. Durational probabilities of surviving without emergence of a covered critical injury are determined from a present date for each future insurance coverage year during the remaining life of the settling claimant. The durational probabilities are multiplied by the critical injury rates and then multiplied by the amounts of the specified monetary benefits. The premiums are then determined for a single claimant and on an aggregate basis for all claimants in any particular batch of mass tort claims settlements.