What type of whole life insurance maintains no fixed premium structure?

The type of whole life insurance that maintains no fixed premium structure is known as non-fixed premium whole life. This form of whole life insurance can have premiums that vary based on certain factors related to the insurer's performance or other criteria, as opposed to traditional whole life policies, which generally require consistent premium payments throughout the life of the policyholder.

In non-fixed premium whole life, the premium amounts can change, reflecting the policy's investment performance, mortality costs, or other risk factors. This provides a more flexible approach for policyholders, allowing them to adjust their payments according to their financial circumstances or the insurer's management of the policy.

The other types of whole life insurance mentioned propose more defined premium structures. Modified premium whole life, for example, starts with lower premiums that increase after a certain period, and graded premium whole life typically features increasing premiums over time in a structured manner. Traditional ordinary whole life insurance, on the other hand, has a stable premium that remains the same throughout the life of the policy.

Thus, the essence of non-fixed premium whole life lies in its flexibility and variability in premium payments based on the underlying dynamics of the policy itself, unlike the more rigid structures of the other listed options.