The ultimate loss is the total sum the insured, its insurer(s), and/or its reinsurer(s) pay for a fully developed loss (i.e., paid losses plus outstanding reported losses and incurred but not reported losses).
It may not be possible to know the exact value of ultimate losses for a long time after the end of a policy period. Actuaries are employed to assist with these projections for purposes of financial modeling and/or year-end reserve determinations.
developed losses