Basic Premium Factor
  
Developed by the insurance industry's hordes of super-genius actuaries and statisticians, the Basic Premium Factor is used by insurance companies to calculate retrospective premiums. It is comprised of the profit, underwriting and acquisition costs, and the loss conversion factor, adjusted for a policy's insurance charge. Two elements not taken into account by the Basic Premium Factor are claims adjustment costs or taxes, which are handled in other parts of the retrospective premium calculation.